VIM: syntax

## SYNTAX

    *syntax.txt*	For Vim version 8.2.  Last change: 2020 Feb 29

    		  VIM REFERENCE MANUAL	  by Bram Moolenaar

    Syntax highlighting		*syntax* *syntax-highlighting* *coloring*

    Syntax highlighting enables Vim to show parts of the text in another font or
    color.	Those parts can be specific keywords or text matching a pattern.  Vim
    doesn't parse the whole file (to keep it fast), so the highlighting has its
    limitations.  Lexical highlighting might be a better name, but since everybody
    calls it syntax highlighting we'll stick with that.

    Vim supports syntax highlighting on all terminals.  But since most ordinary
    terminals have very limited highlighting possibilities, it works best in the
    GUI version, gvim.

    In the User Manual:
    |usr_06| introduces syntax highlighting.
    |usr_44| introduces writing a syntax file.

    1.  Quick start			|:syn-qstart|
    2.  Syntax files		|:syn-files|
    3.  Syntax loading procedure	|syntax-loading|
    4.  Converting to HTML		|2html.vim|
    5.  Syntax file remarks		|:syn-file-remarks|
    6.  Defining a syntax		|:syn-define|
    7.  :syntax arguments		|:syn-arguments|
    8.  Syntax patterns		|:syn-pattern|
    9.  Syntax clusters		|:syn-cluster|
    10. Including syntax files	|:syn-include|
    11. Synchronizing		|:syn-sync|
    12. Listing syntax items	|:syntax|
    13. Highlight command		|:highlight|
    14. Linking groups		|:highlight-link|
    15. Cleaning up			|:syn-clear|
    16. Highlighting tags		|tag-highlight|
    17. Window-local syntax		|:ownsyntax|
    18. Color xterms		|xterm-color|
    19. When syntax is slow		|:syntime|

    {Vi does not have any of these commands}

    Syntax highlighting is not available when the |+syntax| feature has been
    disabled at compile time.

    1. Quick start						*:syn-qstart*

    						*:syn-enable* *:syntax-enable*
    This command switches on syntax highlighting:

    	:syntax enable

    What this command actually does is to execute the command
    	:source $VIMRUNTIME/syntax/syntax.vim

    If the VIM environment variable is not set, Vim will try to find
    the path in another way (see |$VIMRUNTIME|).  Usually this works just
    fine.  If it doesn't, try setting the VIM environment variable to the
    directory where the Vim stuff is located.  For example, if your syntax files
    are in the "/usr/vim/vim82/syntax" directory, set $VIMRUNTIME to
    "/usr/vim/vim82".  You must do this in the shell, before starting Vim.
    This command also sources the |menu.vim| script when the GUI is running or
    will start soon.  See |'go-M'| about avoiding that.

    							*:syn-on* *:syntax-on*
    The `:syntax enable` command will keep your current color settings.  This
    allows using `:highlight` commands to set your preferred colors before or
    after using this command.  If you want Vim to overrule your settings with the
    defaults, use:
    	:syntax on

    					*:hi-normal* *:highlight-normal*
    If you are running in the GUI, you can get white text on a black background
    with:
    	:highlight Normal guibg=Black guifg=White
    For a color terminal see |:hi-normal-cterm|.
    For setting up your own colors syntax highlighting see |syncolor|.

    NOTE: The syntax files on MS-Windows have lines that end in <CR><NL>.
    The files for Unix end in <NL>.  This means you should use the right type of
    file for your system.  Although on MS-Windows the right format is
    automatically selected if the 'fileformats' option is not empty.

    NOTE: When using reverse video ("gvim -fg white -bg black"), the default value
    of 'background' will not be set until the GUI window is opened, which is after
    reading the |gvimrc|.  This will cause the wrong default highlighting to be
    used.  To set the default value of 'background' before switching on
    highlighting, include the ":gui" command in the |gvimrc|:

       :gui		" open window and set default for 'background'
       :syntax on	" start highlighting, use 'background' to set colors

    NOTE: Using ":gui" in the |gvimrc| means that "gvim -f" won't start in the
    foreground!  Use ":gui -f" then.

    							*g:syntax_on*
    You can toggle the syntax on/off with this command:
       :if exists("g:syntax_on") | syntax off | else | syntax enable | endif

    To put this into a mapping, you can use:
       :map <F7> :if exists("g:syntax_on") <Bar>
    	\   syntax off <Bar>
    	\ else <Bar>
    	\   syntax enable <Bar>
    	\ endif <CR>
    [using the |<>| notation, type this literally]

    Details:
    The ":syntax" commands are implemented by sourcing a file.  To see exactly how
    this works, look in the file:
        command		file
        :syntax enable	$VIMRUNTIME/syntax/syntax.vim
        :syntax on		$VIMRUNTIME/syntax/syntax.vim
        :syntax manual	$VIMRUNTIME/syntax/manual.vim
        :syntax off		$VIMRUNTIME/syntax/nosyntax.vim
    Also see |syntax-loading|.

    NOTE: If displaying long lines is slow and switching off syntax highlighting
    makes it fast, consider setting the 'synmaxcol' option to a lower value.

    2. Syntax files						*:syn-files*

    The syntax and highlighting commands for one language are normally stored in
    a syntax file.	The name convention is: "{name}.vim".  Where {name} is the
    name of the language, or an abbreviation (to fit the name in 8.3 characters,
    a requirement in case the file is used on a DOS filesystem).
    Examples:
    	c.vim		perl.vim	java.vim	html.vim
    	cpp.vim		sh.vim		csh.vim

    The syntax file can contain any Ex commands, just like a vimrc file.  But
    the idea is that only commands for a specific language are included.  When a
    language is a superset of another language, it may include the other one,
    for example, the cpp.vim file could include the c.vim file:
       :so $VIMRUNTIME/syntax/c.vim

    The .vim files are normally loaded with an autocommand.  For example:
       :au Syntax c	    runtime! syntax/c.vim
       :au Syntax cpp   runtime! syntax/cpp.vim
    These commands are normally in the file $VIMRUNTIME/syntax/synload.vim.

    MAKING YOUR OWN SYNTAX FILES				*mysyntaxfile*

    When you create your own syntax files, and you want to have Vim use these
    automatically with ":syntax enable", do this:

    1. Create your user runtime directory.	You would normally use the first item
       of the 'runtimepath' option.  Example for Unix:
    	mkdir ~/.vim

    2. Create a directory in there called "syntax".  For Unix:
    	mkdir ~/.vim/syntax

    3. Write the Vim syntax file.  Or download one from the internet.  Then write
       it in your syntax directory.  For example, for the "mine" syntax:
    	:w ~/.vim/syntax/mine.vim

    Now you can start using your syntax file manually:
    	:set syntax=mine
    You don't have to exit Vim to use this.

    If you also want Vim to detect the type of file, see |new-filetype|.

    If you are setting up a system with many users and you don't want each user
    to add the same syntax file, you can use another directory from 'runtimepath'.

    ADDING TO AN EXISTING SYNTAX FILE		*mysyntaxfile-add*

    If you are mostly satisfied with an existing syntax file, but would like to
    add a few items or change the highlighting, follow these steps:

    1. Create your user directory from 'runtimepath', see above.

    2. Create a directory in there called "after/syntax".  For Unix:
    	mkdir ~/.vim/after
    	mkdir ~/.vim/after/syntax

    3. Write a Vim script that contains the commands you want to use.  For
       example, to change the colors for the C syntax:
    	highlight cComment ctermfg=Green guifg=Green

    4. Write that file in the "after/syntax" directory.  Use the name of the
       syntax, with ".vim" added.  For our C syntax:
    	:w ~/.vim/after/syntax/c.vim

    That's it.  The next time you edit a C file the Comment color will be
    different.  You don't even have to restart Vim.

    If you have multiple files, you can use the filetype as the directory name.
    All the "*.vim" files in this directory will be used, for example:
    	~/.vim/after/syntax/c/one.vim
    	~/.vim/after/syntax/c/two.vim

    REPLACING AN EXISTING SYNTAX FILE			*mysyntaxfile-replace*

    If you don't like a distributed syntax file, or you have downloaded a new
    version, follow the same steps as for |mysyntaxfile| above.  Just make sure
    that you write the syntax file in a directory that is early in 'runtimepath'.
    Vim will only load the first syntax file found, assuming that it sets
    b:current_syntax.

    NAMING CONVENTIONS		    *group-name* *{group-name}* *E669* *W18*

    A syntax group name is to be used for syntax items that match the same kind of
    thing.  These are then linked to a highlight group that specifies the color.
    A syntax group name doesn't specify any color or attributes itself.

    The name for a highlight or syntax group must consist of ASCII letters, digits
    and the underscore.  As a regexp: "[a-zA-Z0-9_]*".  However, Vim does not give
    an error when using other characters.

    To be able to allow each user to pick their favorite set of colors, there must
    be preferred names for highlight groups that are common for many languages.
    These are the suggested group names (if syntax highlighting works properly
    you can see the actual color, except for "Ignore"):

    	*Comment	any comment

    	*Constant	any constant
    	 String		a string constant: "this is a string"
    	 Character	a character constant: 'c', '\n'
    	 Number		a number constant: 234, 0xff
    	 Boolean	a boolean constant: TRUE, false
    	 Float		a floating point constant: 2.3e10

    	*Identifier	any variable name
    	 Function	function name (also: methods for classes)

    	*Statement	any statement
    	 Conditional	if, then, else, endif, switch, etc.
    	 Repeat		for, do, while, etc.
    	 Label		case, default, etc.
    	 Operator	"sizeof", "+", "*", etc.
    	 Keyword	any other keyword
    	 Exception	try, catch, throw

    	*PreProc	generic Preprocessor
    	 Include	preprocessor #include
    	 Define		preprocessor #define
    	 Macro		same as Define
    	 PreCondit	preprocessor #if, #else, #endif, etc.

    	*Type		int, long, char, etc.
    	 StorageClass	static, register, volatile, etc.
    	 Structure	struct, union, enum, etc.
    	 Typedef	A typedef

    	*Special	any special symbol
    	 SpecialChar	special character in a constant
    	 Tag		you can use CTRL-] on this
    	 Delimiter	character that needs attention
    	 SpecialComment	special things inside a comment
    	 Debug		debugging statements

    	*Underlined	text that stands out, HTML links

    	*Ignore		left blank, hidden  |hl-Ignore|

    	*Error		any erroneous construct

    	*Todo		anything that needs extra attention; mostly the
    			keywords TODO FIXME and XXX

    The names marked with * are the preferred groups; the others are minor groups.
    For the preferred groups, the "syntax.vim" file contains default highlighting.
    The minor groups are linked to the preferred groups, so they get the same
    highlighting.  You can override these defaults by using ":highlight" commands
    after sourcing the "syntax.vim" file.

    Note that highlight group names are not case sensitive.  "String" and "string"
    can be used for the same group.

    The following names are reserved and cannot be used as a group name:
    	NONE   ALL   ALLBUT   contains	 contained

    							*hl-Ignore*
    When using the Ignore group, you may also consider using the conceal
    mechanism.  See |conceal|.

    3. Syntax loading procedure				*syntax-loading*

    This explains the details that happen when the command ":syntax enable" is
    issued.  When Vim initializes itself, it finds out where the runtime files are
    located.  This is used here as the variable |$VIMRUNTIME|.

    ":syntax enable" and ":syntax on" do the following:

        Source $VIMRUNTIME/syntax/syntax.vim
        |
        +-	Clear out any old syntax by sourcing $VIMRUNTIME/syntax/nosyntax.vim
        |
        +-	Source first syntax/synload.vim in 'runtimepath'
        |	|
        |	+-  Setup the colors for syntax highlighting.  If a color scheme is
        |	|   defined it is loaded again with ":colors {name}".  Otherwise
        |	|   ":runtime! syntax/syncolor.vim" is used.  ":syntax on" overrules
        |	|   existing colors, ":syntax enable" only sets groups that weren't
        |	|   set yet.
        |	|
        |	+-  Set up syntax autocmds to load the appropriate syntax file when
        |	|   the 'syntax' option is set. *synload-1*
        |	|
        |	+-  Source the user's optional file, from the |mysyntaxfile| variable.
        |	    This is for backwards compatibility with Vim 5.x only. *synload-2*
        |
        +-	Do ":filetype on", which does ":runtime! filetype.vim".  It loads any
        |	filetype.vim files found.  It should always Source
        |	$VIMRUNTIME/filetype.vim, which does the following.
        |	|
        |	+-  Install autocmds based on suffix to set the 'filetype' option
        |	|   This is where the connection between file name and file type is
        |	|   made for known file types. *synload-3*
        |	|
        |	+-  Source the user's optional file, from the *myfiletypefile*
        |	|   variable.  This is for backwards compatibility with Vim 5.x only.
        |	|   *synload-4*
        |	|
        |	+-  Install one autocommand which sources scripts.vim when no file
        |	|   type was detected yet. *synload-5*
        |	|
        |	+-  Source $VIMRUNTIME/menu.vim, to setup the Syntax menu. |menu.vim|
        |
        +-	Install a FileType autocommand to set the 'syntax' option when a file
        |	type has been detected. *synload-6*
        |
        +-	Execute syntax autocommands to start syntax highlighting for each
    	already loaded buffer.

    Upon loading a file, Vim finds the relevant syntax file as follows:

        Loading the file triggers the BufReadPost autocommands.
        |
        +-	If there is a match with one of the autocommands from |synload-3|
        |	(known file types) or |synload-4| (user's file types), the 'filetype'
        |	option is set to the file type.
        |
        +-	The autocommand at |synload-5| is triggered.  If the file type was not
        |	found yet, then scripts.vim is searched for in 'runtimepath'.  This
        |	should always load $VIMRUNTIME/scripts.vim, which does the following.
        |	|
        |	+-  Source the user's optional file, from the *myscriptsfile*
        |	|   variable.  This is for backwards compatibility with Vim 5.x only.
        |	|
        |	+-  If the file type is still unknown, check the contents of the file,
        |	    again with checks like "getline(1) =~ pattern" as to whether the
        |	    file type can be recognized, and set 'filetype'.
        |
        +-	When the file type was determined and 'filetype' was set, this
        |	triggers the FileType autocommand |synload-6| above.  It sets
        |	'syntax' to the determined file type.
        |
        +-	When the 'syntax' option was set above, this triggers an autocommand
        |	from |synload-1| (and |synload-2|).  This find the main syntax file in
        |	'runtimepath', with this command:
        |		runtime! syntax/<name>.vim
        |
        +-	Any other user installed FileType or Syntax autocommands are
    	triggered.  This can be used to change the highlighting for a specific
    	syntax.

    4. Conversion to HTML				*2html.vim* *convert-to-HTML*

    2html is not a syntax file itself, but a script that converts the current
    window into HTML. Vim opens a new window in which it builds the HTML file.

    After you save the resulting file, you can view it with any browser. The
    colors should be exactly the same as you see them in Vim.  With
    |g:html_line_ids| you can jump to specific lines by adding (for example) #L123
    or #123 to the end of the URL in your browser's address bar. And with
    |g:html_dynamic_folds| enabled, you can show or hide the text that is folded
    in Vim.

    You are not supposed to set the 'filetype' or 'syntax' option to "2html"!
    Source the script to convert the current file:

    	:runtime! syntax/2html.vim

    Many variables affect the output of 2html.vim; see below. Any of the on/off
    options listed below can be enabled or disabled by setting them explicitly to
    the desired value, or restored to their default by removing the variable using
    |:unlet|.

    Remarks:
    - Some truly ancient browsers may not show the background colors.
    - From most browsers you can also print the file (in color)!
    - The latest TOhtml may actually work with older versions of Vim, but some
      features such as conceal support will not function, and the colors may be
      incorrect for an old Vim without GUI support compiled in.

    Here is an example how to run the script over all .c and .h files from a
    Unix shell:
       for f in *.[ch]; do gvim -f +"syn on" +"run! syntax/2html.vim" +"wq" +"q" $f; done

    					*g:html_start_line* *g:html_end_line*
    To restrict the conversion to a range of lines, use a range with the |:TOhtml|
    command below, or set "g:html_start_line" and "g:html_end_line" to the first
    and last line to be converted.  Example, using the last set Visual area:

    	:let g:html_start_line = line("'<")
    	:let g:html_end_line = line("'>")
    	:runtime! syntax/2html.vim

    							*:TOhtml*
    :[range]TOhtml		The ":TOhtml" command is defined in a standard plugin.
    			This command will source |2html.vim| for you. When a
    			range is given, this command sets |g:html_start_line|
    			and |g:html_end_line| to the start and end of the
    			range, respectively. Default range is the entire
    			buffer.

    			If the current window is part of a |diff|, unless
    			|g:html_diff_one_file| is set, :TOhtml will convert
    			all windows which are part of the diff in the current
    			tab and place them side-by-side in a <table> element
    			in the generated HTML. With |g:html_line_ids| you can
    			jump to lines in specific windows with (for example)
    			#W1L42 for line 42 in the first diffed window, or
    			#W3L87 for line 87 in the third.

    			Examples:

    	:10,40TOhtml " convert lines 10-40 to html
    	:'<,'>TOhtml " convert current/last visual selection
    	:TOhtml      " convert entire buffer

    							*g:html_diff_one_file*
    Default: 0.
    When 0, and using |:TOhtml| all windows involved in a |diff| in the current tab
    page are converted to HTML and placed side-by-side in a <table> element. When
    1, only the current buffer is converted.
    Example:

    	let g:html_diff_one_file = 1

    							 *g:html_whole_filler*
    Default: 0.
    When 0, if |g:html_diff_one_file| is 1, a sequence of more than 3 filler lines
    is displayed as three lines with the middle line mentioning the total number
    of inserted lines.
    When 1, always display all inserted lines as if |g:html_diff_one_file| were
    not set.

        :let g:html_whole_filler = 1

    				     *TOhtml-performance* *g:html_no_progress*
    Default: 0.
    When 0, display a progress bar in the statusline for each major step in the
    2html.vim conversion process.
    When 1, do not display the progress bar. This offers a minor speed improvement
    but you won't have any idea how much longer the conversion might take; for big
    files it can take a long time!
    Example:

    	let g:html_no_progress = 1

    You can obtain better performance improvements by also instructing Vim to not
    run interactively, so that too much time is not taken to redraw as the script
    moves through the buffer, switches windows, and the like:

      vim -E -s -c "let g:html_no_progress=1" -c "syntax on" -c "set ft=c" -c "runtime syntax/2html.vim" -cwqa myfile.c

    Note that the -s flag prevents loading your .vimrc and any plugins, so you
    need to explicitly source/enable anything that will affect the HTML
    conversion. See |-E| and |-s-ex| for details. It is probably best to create a
    script to replace all the -c commands and use it with the -u flag instead of
    specifying each command separately.

    				    *hl-TOhtmlProgress* *TOhtml-progress-color*
    When displayed, the progress bar will show colored boxes along the statusline
    as the HTML conversion proceeds. By default, the background color as the
    current "DiffDelete" highlight group is used. If "DiffDelete" and "StatusLine"
    have the same background color, TOhtml will automatically adjust the color to
    differ. If you do not like the automatically selected colors, you can define
    your own highlight colors for the progress bar. Example:

    	hi TOhtmlProgress guifg=#c0ffee ctermbg=7

    							 *g:html_number_lines*
    Default: current 'number' setting.
    When 0, buffer text is displayed in the generated HTML without line numbering.
    When 1, a column of line numbers is added to the generated HTML with the same
    highlighting as the line number column in Vim (|hl-LineNr|).
    Force line numbers even if 'number' is not set:
       :let g:html_number_lines = 1
    Force to omit the line numbers:
       :let g:html_number_lines = 0
    Go back to the default to use 'number' by deleting the variable:
       :unlet g:html_number_lines

                                                                 *g:html_line_ids*
    Default: 1 if |g:html_number_lines| is set, 0 otherwise.
    When 1, adds an HTML id attribute to each line number, or to an empty <span>
    inserted for that purpose if no line numbers are shown. This ID attribute
    takes the form of L123 for single-buffer HTML pages, or W2L123 for diff-view
    pages, and is used to jump to a specific line (in a specific window of a diff
    view). Javascript is inserted to open any closed dynamic folds
    (|g:html_dynamic_folds|) containing the specified line before jumping. The
    javascript also allows omitting the window ID in the url, and the leading L.
    For example:

    	page.html#L123	jumps to line 123 in a single-buffer file
    	page.html#123	does the same

    	diff.html#W1L42	jumps to line 42 in the first window in a diff
    	diff.html#42	does the same

    							      *g:html_use_css*
    Default: 1.
    When 1, generate valid HTML 5 markup with CSS styling, supported in all modern
    browsers and many old browsers.
    When 0, generate <font> tags and similar outdated markup. This is not
    recommended but it may work better in really old browsers, email clients,
    forum posts, and similar situations where basic CSS support is unavailable.
    Example:
       :let g:html_use_css = 0

    						       *g:html_ignore_conceal*
    Default: 0.
    When 0, concealed text is removed from the HTML and replaced with a character
    from |:syn-cchar| or 'listchars' as appropriate, depending on the current
    value of 'conceallevel'.
    When 1, include all text from the buffer in the generated HTML, even if it is
    |conceal|ed.

    Either of the following commands will ensure that all text in the buffer is
    included in the generated HTML (unless it is folded):
       :let g:html_ignore_conceal = 1
       :setl conceallevel=0

    						       *g:html_ignore_folding*
    Default: 0.
    When 0, text in a closed fold is replaced by the text shown for the fold in
    Vim (|fold-foldtext|). See |g:html_dynamic_folds| if you also want to allow
    the user to expand the fold as in Vim to see the text inside.
    When 1, include all text from the buffer in the generated HTML; whether the
    text is in a fold has no impact at all. |g:html_dynamic_folds| has no effect.

    Either of these commands will ensure that all text in the buffer is included
    in the generated HTML (unless it is concealed):
       zR
       :let g:html_ignore_folding = 1

    							*g:html_dynamic_folds*
    Default: 0.
    When 0, text in a closed fold is not included at all in the generated HTML.
    When 1, generate javascript to open a fold and show the text within, just like
    in Vim.

    Setting this variable to 1 causes 2html.vim to always use CSS for styling,
    regardless of what |g:html_use_css| is set to.

    This variable is ignored when |g:html_ignore_folding| is set.

       :let g:html_dynamic_folds = 1

    							*g:html_no_foldcolumn*
    Default: 0.
    When 0, if |g:html_dynamic_folds| is 1, generate a column of text similar to
    Vim's foldcolumn (|fold-foldcolumn|) the user can click on to toggle folds
    open or closed. The minimum width of the generated text column is the current
    'foldcolumn' setting.
    When 1, do not generate this column; instead, hovering the mouse cursor over
    folded text will open the fold as if |g:html_hover_unfold| were set.

       :let g:html_no_foldcolumn = 1

    				*TOhtml-uncopyable-text* *g:html_prevent_copy*
    Default: empty string.
    This option prevents certain regions of the generated HTML from being copied,
    when you select all text in document rendered in a browser and copy it. Useful
    for allowing users to copy-paste only the source text even if a fold column or
    line numbers are shown in the generated content. Specify regions to be
    affected in this way as follows:
    	f:	fold column
    	n:	line numbers (also within fold text)
    	t:	fold text
    	d:	diff filler

    Example, to make the fold column and line numbers uncopyable:
    	:let g:html_prevent_copy = "fn"

    The method used to prevent copying in the generated page depends on the value
    of |g:html_use_input_for_pc|.

    						    *g:html_use_input_for_pc*
    Default: "fallback"
    If |g:html_prevent_copy| is non-empty, then:

    When "all", read-only <input> elements are used in place of normal text for
    uncopyable regions. In some browsers, especially older browsers, after
    selecting an entire page and copying the selection, the <input> tags are not
    pasted with the page text. If |g:html_no_invalid| is 0, the <input> tags have
    invalid type; this works in more browsers, but the page will not validate.
    Note: this method does NOT work in recent versions of Chrome and equivalent
    browsers; the <input> tags get pasted with the text.

    When "fallback" (default value), the same <input> elements are generated for
    older browsers, but newer browsers (detected by CSS feature query) hide the
    <input> elements and instead use generated content in an ::before pseudoelement
    to display the uncopyable text. This method should work with the largest
    number of browsers, both old and new.

    When "none", the <input> elements are not generated at all. Only the
    generated-content method is used. This means that old browsers, notably
    Internet Explorer, will either copy the text intended not to be copyable, or
    the non-copyable text may not appear at all. However, this is the most
    standards-based method, and there will be much less markup.

    							   *g:html_no_invalid*
    Default: 0.
    When 0, if |g:html_prevent_copy| is non-empty and |g:html_use_input_for_pc| is
    not "none", an invalid attribute is intentionally inserted into the <input>
    element for the uncopyable areas. This prevents pasting the <input> elements
    in some applications. Specifically, some versions of Microsoft Word will not
    paste the <input> elements if they contain this invalid attribute. When 1, no
    invalid markup is inserted, and the generated page should validate. However,
    <input> elements may be pasted into some applications and can be difficult to
    remove afterward.

    							 *g:html_hover_unfold*
    Default: 0.
    When 0, the only way to open a fold generated by 2html.vim with
    |g:html_dynamic_folds| set, is to click on the generated fold column.
    When 1, use CSS 2.0 to allow the user to open a fold by moving the mouse
    cursor over the displayed fold text. This is useful to allow users with
    disabled javascript to view the folded text.

    Note that old browsers (notably Internet Explorer 6) will not support this
    feature.  Browser-specific markup for IE6 is included to fall back to the
    normal CSS1 styling so that the folds show up correctly for this browser, but
    they will not be openable without a foldcolumn.

       :let g:html_hover_unfold = 1

    							      *g:html_id_expr*
    Default: ""
    Dynamic folding and jumping to line IDs rely on unique IDs within the document
    to work. If generated HTML is copied into a larger document, these IDs are no
    longer guaranteed to be unique. Set g:html_id_expr to an expression Vim can
    evaluate to get a unique string to append to each ID used in a given document,
    so that the full IDs will be unique even when combined with other content in a
    larger HTML document. Example, to append _ and the buffer number to each ID:

    	:let g:html_id_expr = '"_".bufnr("%")'

    To append a string "_mystring" to the end of each ID:

    	:let g:html_id_expr = '"_mystring"'

    Note, when converting a diff view to HTML, the expression will only be
    evaluated for the first window in the diff, and the result used for all the
    windows.

    					  *TOhtml-wrap-text* *g:html_pre_wrap*
    Default: current 'wrap' setting.
    When 0, if |g:html_no_pre| is 0 or unset, the text in the generated HTML does
    not wrap at the edge of the browser window.
    When 1, if |g:html_use_css| is 1, the CSS 2.0 "white-space:pre-wrap" value is
    used, causing the text to wrap at whitespace at the edge of the browser
    window.
    Explicitly enable text wrapping:
       :let g:html_pre_wrap = 1
    Explicitly disable wrapping:
       :let g:html_pre_wrap = 0
    Go back to default, determine wrapping from 'wrap' setting:
       :unlet g:html_pre_wrap

    							       *g:html_no_pre*
    Default: 0.
    When 0, buffer text in the generated HTML is surrounded by <pre>...</pre>
    tags. Series of whitespace is shown as in Vim without special markup, and tab
    characters can be included literally (see |g:html_expand_tabs|).
    When 1 (not recommended), the <pre> tags are omitted, and a plain <div> is
    used instead. Whitespace is replaced by a series of &nbsp; character
    references, and <br> is used to end each line. This is another way to allow
    text in the generated HTML is wrap (see |g:html_pre_wrap|) which also works in
    old browsers, but may cause noticeable differences between Vim's display and
    the rendered page generated by 2html.vim.

       :let g:html_no_pre = 1

    							  *g:html_expand_tabs*
    Default: 0 if 'tabstop' is 8, 'expandtab' is 0, 'vartabstop' is not in use,
    	       and no fold column or line numbers occur in the generated HTML;
    	 1 otherwise.
    When 1, <Tab> characters in the buffer text are replaced with an appropriate
    number of space characters, or &nbsp; references if |g:html_no_pre| is 1.
    When 0, if |g:html_no_pre| is 0 or unset, <Tab> characters in the buffer text
    are included as-is in the generated HTML. This is useful for when you want to
    allow copy and paste from a browser without losing the actual whitespace in
    the source document. Note that this can easily break text alignment and
    indentation in the HTML, unless set by default.

    Force |2html.vim| to keep <Tab> characters:
       :let g:html_expand_tabs = 0

    Force tabs to be expanded:
       :let g:html_expand_tabs = 1

    				    *TOhtml-encoding-detect* *TOhtml-encoding*
    It is highly recommended to set your desired encoding with
    |g:html_use_encoding| for any content which will be placed on a web server.

    If you do not specify an encoding, |2html.vim| uses the preferred IANA name
    for the current value of 'fileencoding' if set, or 'encoding' if not.
    'encoding' is always used for certain 'buftype' values. 'fileencoding' will be
    set to match the chosen document encoding.

    Automatic detection works for the encodings mentioned specifically by name in
    |encoding-names|, but TOhtml will only automatically use those encodings with
    wide browser support. However, you can override this to support specific
    encodings that may not be automatically detected by default (see options
    below). See http://www.iana.org/assignments/character-sets for the IANA names.

    Note, by default all Unicode encodings are converted to UTF-8 with no BOM in
    the generated HTML, as recommended by W3C:

    	http://www.w3.org/International/questions/qa-choosing-encodings
    	http://www.w3.org/International/questions/qa-byte-order-mark

    							 *g:html_use_encoding*
    Default: none, uses IANA name for current 'fileencoding' as above.
    To overrule all automatic charset detection, set g:html_use_encoding to the
    name of the charset to be used. It is recommended to set this variable to
    something widely supported, like UTF-8, for anything you will be hosting on a
    webserver:
       :let g:html_use_encoding = "UTF-8"
    You can also use this option to omit the line that specifies the charset
    entirely, by setting g:html_use_encoding to an empty string (NOT recommended):
       :let g:html_use_encoding = ""
    To go back to the automatic mechanism, delete the |g:html_use_encoding|
    variable:
       :unlet g:html_use_encoding

    						    *g:html_encoding_override*
    Default: none, autoload/tohtml.vim contains default conversions for encodings
    		mentioned by name at |encoding-names|.
    This option allows |2html.vim| to detect the correct 'fileencoding' when you
    specify an encoding with |g:html_use_encoding| which is not in the default
    list of conversions.

    This is a dictionary of charset-encoding pairs that will replace existing
    pairs automatically detected by TOhtml, or supplement with new pairs.

    Detect the HTML charset "windows-1252" as the encoding "8bit-cp1252":
       :let g:html_encoding_override = {'windows-1252': '8bit-cp1252'}

    						     *g:html_charset_override*
    Default: none, autoload/tohtml.vim contains default conversions for encodings
    		mentioned by name at |encoding-names| and which have wide
    		browser support.
    This option allows |2html.vim| to detect the HTML charset for any
    'fileencoding' or 'encoding' which is not detected automatically. You can also
    use it to override specific existing encoding-charset pairs. For example,
    TOhtml will by default use UTF-8 for all Unicode/UCS encodings. To use UTF-16
    and UTF-32 instead, use:
       :let g:html_charset_override = {'ucs-4': 'UTF-32', 'utf-16': 'UTF-16'}

    Note that documents encoded in either UTF-32 or UTF-16 have known
    compatibility problems with some major browsers.

    								 *g:html_font*
    Default: "monospace"
    You can specify the font or fonts used in the converted document using
    g:html_font. If this option is set to a string, then the value will be
    surrounded with single quotes. If this option is set to a list then each list
    item is surrounded by single quotes and the list is joined with commas. Either
    way, "monospace" is added as the fallback generic family name and the entire
    result used as the font family (using CSS) or font face (if not using CSS).
    Examples:

       " font-family: 'Consolas', monospace;
       :let g:html_font = "Consolas"

       " font-family: 'DejaVu Sans Mono', 'Consolas', monospace;
       :let g:html_font = ["DejaVu Sans Mono", "Consolas"]

    			*convert-to-XML* *convert-to-XHTML* *g:html_use_xhtml*
    Default: 0.
    When 0, generate standard HTML 4.01 (strict when possible).
    When 1, generate XHTML 1.0 instead (XML compliant HTML).

        :let g:html_use_xhtml = 1

    5. Syntax file remarks					*:syn-file-remarks*

    						*b:current_syntax-variable*
    Vim stores the name of the syntax that has been loaded in the
    "b:current_syntax" variable.  You can use this if you want to load other
    settings, depending on which syntax is active.	Example:
       :au BufReadPost * if b:current_syntax == "csh"
       :au BufReadPost *   do-some-things
       :au BufReadPost * endif

    ABEL						*abel.vim* *ft-abel-syntax*

    ABEL highlighting provides some user-defined options.  To enable them, assign
    any value to the respective variable.  Example:
    	:let abel_obsolete_ok=1
    To disable them use ":unlet".  Example:
    	:unlet abel_obsolete_ok

    Variable			Highlight
    abel_obsolete_ok		obsolete keywords are statements, not errors
    abel_cpp_comments_illegal	do not interpret '//' as inline comment leader

    ADA

    See |ft-ada-syntax|

    ANT						*ant.vim* *ft-ant-syntax*

    The ant syntax file provides syntax highlighting for javascript and python
    by default.  Syntax highlighting for other script languages can be installed
    by the function AntSyntaxScript(), which takes the tag name as first argument
    and the script syntax file name as second argument.  Example:

    	:call AntSyntaxScript('perl', 'perl.vim')

    will install syntax perl highlighting for the following ant code

    	<script language = 'perl'><![CDATA[
    	    # everything inside is highlighted as perl
    	]]></script>

    See |mysyntaxfile-add| for installing script languages permanently.

    APACHE						*apache.vim* *ft-apache-syntax*

    The apache syntax file provides syntax highlighting for Apache HTTP server
    version 2.2.3.

    		*asm.vim* *asmh8300.vim* *nasm.vim* *masm.vim* *asm68k*
    ASSEMBLY	*ft-asm-syntax* *ft-asmh8300-syntax* *ft-nasm-syntax*
    		*ft-masm-syntax* *ft-asm68k-syntax* *fasm.vim*

    Files matching "*.i" could be Progress or Assembly.  If the automatic detection
    doesn't work for you, or you don't edit Progress at all, use this in your
    startup vimrc:
       :let filetype_i = "asm"
    Replace "asm" with the type of assembly you use.

    There are many types of assembly languages that all use the same file name
    extensions.  Therefore you will have to select the type yourself, or add a
    line in the assembly file that Vim will recognize.  Currently these syntax
    files are included:
    	asm		GNU assembly (the default)
    	asm68k		Motorola 680x0 assembly
    	asmh8300	Hitachi H-8300 version of GNU assembly
    	ia64		Intel Itanium 64
    	fasm		Flat assembly (http://flatassembler.net)
    	masm		Microsoft assembly (probably works for any 80x86)
    	nasm		Netwide assembly
    	tasm		Turbo Assembly (with opcodes 80x86 up to Pentium, and
    			MMX)
    	pic		PIC assembly (currently for PIC16F84)

    The most flexible is to add a line in your assembly file containing:
    	asmsyntax=nasm
    Replace "nasm" with the name of the real assembly syntax.  This line must be
    one of the first five lines in the file.  No non-white text must be
    immediately before or after this text.  Note that specifying asmsyntax=foo is
    equivalent to setting ft=foo in a |modeline|, and that in case of a conflict
    between the two settings the one from the modeline will take precedence (in
    particular, if you have ft=asm in the modeline, you will get the GNU syntax
    highlighting regardless of what is specified as asmsyntax).

    The syntax type can always be overruled for a specific buffer by setting the
    b:asmsyntax variable:
    	:let b:asmsyntax = "nasm"

    If b:asmsyntax is not set, either automatically or by hand, then the value of
    the global variable asmsyntax is used.	This can be seen as a default assembly
    language:
    	:let asmsyntax = "nasm"

    As a last resort, if nothing is defined, the "asm" syntax is used.

    Netwide assembler (nasm.vim) optional highlighting

    To enable a feature:
    	:let   {variable}=1|set syntax=nasm
    To disable a feature:
    	:unlet {variable}  |set syntax=nasm

    Variable		Highlight
    nasm_loose_syntax	unofficial parser allowed syntax not as Error
    			  (parser dependent; not recommended)
    nasm_ctx_outside_macro	contexts outside macro not as Error
    nasm_no_warn		potentially risky syntax not as ToDo

    ASPPERL and ASPVBS			*ft-aspperl-syntax* *ft-aspvbs-syntax*

    *.asp and *.asa files could be either Perl or Visual Basic script.  Since it's
    hard to detect this you can set two global variables to tell Vim what you are
    using.	For Perl script use:
    	:let g:filetype_asa = "aspperl"
    	:let g:filetype_asp = "aspperl"
    For Visual Basic use:
    	:let g:filetype_asa = "aspvbs"
    	:let g:filetype_asp = "aspvbs"

    BAAN						    *baan.vim* *baan-syntax*

    The baan.vim gives syntax support for BaanC of release BaanIV upto SSA ERP LN
    for both 3 GL and 4 GL programming. Large number of standard defines/constants
    are supported.

    Some special violation of coding standards will be signalled when one specify
    in ones |.vimrc|:
    	let baan_code_stds=1

    *baan-folding*

    Syntax folding can be enabled at various levels through the variables
    mentioned below (Set those in your |.vimrc|). The more complex folding on
    source blocks and SQL can be CPU intensive.

    To allow any folding and enable folding at function level use:
    	let baan_fold=1
    Folding can be enabled at source block level as if, while, for ,... The
    indentation preceding the begin/end keywords has to match (spaces are not
    considered equal to a tab).
    	let baan_fold_block=1
    Folding can be enabled for embedded SQL blocks as SELECT, SELECTDO,
    SELECTEMPTY, ... The indentation preceding the begin/end keywords has to
    match (spaces are not considered equal to a tab).
    	let baan_fold_sql=1
    Note: Block folding can result in many small folds. It is suggested to |:set|
    the options 'foldminlines' and 'foldnestmax' in |.vimrc| or use |:setlocal| in
    .../after/syntax/baan.vim (see |after-directory|). Eg:
    	set foldminlines=5
    	set foldnestmax=6

    BASIC			*basic.vim* *vb.vim* *ft-basic-syntax* *ft-vb-syntax*

    Both Visual Basic and "normal" basic use the extension ".bas".	To detect
    which one should be used, Vim checks for the string "VB_Name" in the first
    five lines of the file.  If it is not found, filetype will be "basic",
    otherwise "vb".  Files with the ".frm" extension will always be seen as Visual
    Basic.

    C							*c.vim* *ft-c-syntax*

    A few things in C highlighting are optional.  To enable them assign any value
    (including zero) to the respective variable.  Example:
    	:let c_comment_strings = 1
    	:let c_no_bracket_error = 0
    To disable them use `:unlet`.  Example:
    	:unlet c_comment_strings
    Setting the value to zero doesn't work!

    An alternative is to switch to the C++ highlighting:
    	:set filetype=cpp

    Variable		Highlight
    *c_gnu*			GNU gcc specific items
    *c_comment_strings*	strings and numbers inside a comment
    *c_space_errors*		trailing white space and spaces before a <Tab>
    *c_no_trail_space_error*	 ... but no trailing spaces
    *c_no_tab_space_error*	 ... but no spaces before a <Tab>
    *c_no_bracket_error*	don't highlight {}; inside [] as errors
    *c_no_curly_error*	don't highlight {}; inside [] and () as errors;
    				except { and } in first column
    				Default is to highlight them, otherwise you
    				can't spot a missing ")".
    *c_curly_error*		highlight a missing } by finding all pairs; this
    			forces syncing from the start of the file, can be slow
    *c_no_ansi*		don't do standard ANSI types and constants
    *c_ansi_typedefs*		 ... but do standard ANSI types
    *c_ansi_constants*	 ... but do standard ANSI constants
    *c_no_utf*		don't highlight \u and \U in strings
    *c_syntax_for_h*		for *.h files use C syntax instead of C++ and use objc
    			syntax instead of objcpp
    *c_no_if0*		don't highlight "#if 0" blocks as comments
    *c_no_cformat*		don't highlight %-formats in strings
    *c_no_c99*		don't highlight C99 standard items
    *c_no_c11*		don't highlight C11 standard items
    *c_no_bsd*		don't highlight BSD specific types

    When 'foldmethod' is set to "syntax" then /* */ comments and { } blocks will
    become a fold.  If you don't want comments to become a fold use:
    	:let c_no_comment_fold = 1
    "#if 0" blocks are also folded, unless:
    	:let c_no_if0_fold = 1

    If you notice highlighting errors while scrolling backwards, which are fixed
    when redrawing with CTRL-L, try setting the "c_minlines" internal variable
    to a larger number:
    	:let c_minlines = 100
    This will make the syntax synchronization start 100 lines before the first
    displayed line.  The default value is 50 (15 when c_no_if0 is set).  The
    disadvantage of using a larger number is that redrawing can become slow.

    When using the "#if 0" / "#endif" comment highlighting, notice that this only
    works when the "#if 0" is within "c_minlines" from the top of the window.  If
    you have a long "#if 0" construct it will not be highlighted correctly.

    To match extra items in comments, use the cCommentGroup cluster.
    Example:
       :au Syntax c call MyCadd()
       :function MyCadd()
       :  syn keyword cMyItem contained Ni
       :  syn cluster cCommentGroup add=cMyItem
       :  hi link cMyItem Title
       :endfun

    ANSI constants will be highlighted with the "cConstant" group.	This includes
    "NULL", "SIG_IGN" and others.  But not "TRUE", for example, because this is
    not in the ANSI standard.  If you find this confusing, remove the cConstant
    highlighting:
    	:hi link cConstant NONE

    If you see '{' and '}' highlighted as an error where they are OK, reset the
    highlighting for cErrInParen and cErrInBracket.

    If you want to use folding in your C files, you can add these lines in a file
    in the "after" directory in 'runtimepath'.  For Unix this would be
    ~/.vim/after/syntax/c.vim.
        syn sync fromstart
        set foldmethod=syntax

    CH						*ch.vim* *ft-ch-syntax*

    C/C++ interpreter.  Ch has similar syntax highlighting to C and builds upon
    the C syntax file.  See |c.vim| for all the settings that are available for C.

    By setting a variable you can tell Vim to use Ch syntax for *.h files, instead
    of C or C++:
    	:let ch_syntax_for_h = 1

    CHILL						*chill.vim* *ft-chill-syntax*

    Chill syntax highlighting is similar to C.  See |c.vim| for all the settings
    that are available.  Additionally there is:

    chill_space_errors	like c_space_errors
    chill_comment_string	like c_comment_strings
    chill_minlines		like c_minlines

    CHANGELOG				*changelog.vim* *ft-changelog-syntax*

    ChangeLog supports highlighting spaces at the start of a line.
    If you do not like this, add following line to your .vimrc:
    	let g:changelog_spacing_errors = 0
    This works the next time you edit a changelog file.  You can also use
    "b:changelog_spacing_errors" to set this per buffer (before loading the syntax
    file).

    You can change the highlighting used, e.g., to flag the spaces as an error:
    	:hi link ChangelogError Error
    Or to avoid the highlighting:
    	:hi link ChangelogError NONE
    This works immediately.

    CLOJURE							*ft-clojure-syntax*

    The default syntax groups can be augmented through the
    *g:clojure_syntax_keywords* and *b:clojure_syntax_keywords* variables. The
    value should be a |Dictionary| of syntax group names to a |List| of custom
    identifiers:

    	let g:clojure_syntax_keywords = {
    	    \ 'clojureMacro': ["defproject", "defcustom"],
    	    \ 'clojureFunc': ["string/join", "string/replace"]
    	    \ }

    Refer to the Clojure syntax script for valid syntax group names.

    If the |buffer-variable| *b:clojure_syntax_without_core_keywords* is set, only
    language constants and special forms are matched.

    Setting *g:clojure_fold* enables folding Clojure code via the syntax engine.
    Any list, vector, or map that extends over more than one line can be folded
    using the standard Vim |fold-commands|.

    Please note that this option does not work with scripts that redefine the
    bracket syntax regions, such as rainbow-parentheses plugins.

    This option is off by default.

    	" Default
    	let g:clojure_fold = 0

    COBOL						*cobol.vim* *ft-cobol-syntax*

    COBOL highlighting has different needs for legacy code than it does for fresh
    development.  This is due to differences in what is being done (maintenance
    versus development) and other factors.	To enable legacy code highlighting,
    add this line to your .vimrc:
    	:let cobol_legacy_code = 1
    To disable it again, use this:
    	:unlet cobol_legacy_code

    COLD FUSION			*coldfusion.vim* *ft-coldfusion-syntax*

    The ColdFusion has its own version of HTML comments.  To turn on ColdFusion
    comment highlighting, add the following line to your startup file:

    	:let html_wrong_comments = 1

    The ColdFusion syntax file is based on the HTML syntax file.

    CPP						*cpp.vim* *ft-cpp-syntax*

    Most of things are same as |ft-c-syntax|.

    Variable		Highlight
    cpp_no_cpp11		don't highlight C++11 standard items
    cpp_no_cpp14		don't highlight C++14 standard items

    CSH						*csh.vim* *ft-csh-syntax*

    This covers the shell named "csh".  Note that on some systems tcsh is actually
    used.

    Detecting whether a file is csh or tcsh is notoriously hard.  Some systems
    symlink /bin/csh to /bin/tcsh, making it almost impossible to distinguish
    between csh and tcsh.  In case VIM guesses wrong you can set the
    "filetype_csh" variable.  For using csh:  *g:filetype_csh*

    	:let g:filetype_csh = "csh"

    For using tcsh:

    	:let g:filetype_csh = "tcsh"

    Any script with a tcsh extension or a standard tcsh filename (.tcshrc,
    tcsh.tcshrc, tcsh.login) will have filetype tcsh.  All other tcsh/csh scripts
    will be classified as tcsh, UNLESS the "filetype_csh" variable exists.  If the
    "filetype_csh" variable exists, the filetype will be set to the value of the
    variable.

    CYNLIB						*cynlib.vim* *ft-cynlib-syntax*

    Cynlib files are C++ files that use the Cynlib class library to enable
    hardware modelling and simulation using C++.  Typically Cynlib files have a .cc
    or a .cpp extension, which makes it very difficult to distinguish them from a
    normal C++ file.  Thus, to enable Cynlib highlighting for .cc files, add this
    line to your .vimrc file:

    	:let cynlib_cyntax_for_cc=1

    Similarly for cpp files (this extension is only usually used in Windows)

    	:let cynlib_cyntax_for_cpp=1

    To disable these again, use this:

    	:unlet cynlib_cyntax_for_cc
    	:unlet cynlib_cyntax_for_cpp

    CWEB						*cweb.vim* *ft-cweb-syntax*

    Files matching "*.w" could be Progress or cweb.  If the automatic detection
    doesn't work for you, or you don't edit Progress at all, use this in your
    startup vimrc:
       :let filetype_w = "cweb"

    DART						*dart.vim* *ft-dart-syntax*

    Dart is an object-oriented, typed, class defined, garbage collected language
    used for developing mobile, desktop, web, and back-end applications.  Dart uses
    a C-like syntax derived from C, Java, and JavaScript, with features adopted
    from Smalltalk, Python, Ruby, and others.

    More information about the language and its development environment at the
    official Dart language website at https://dart.dev

    dart.vim syntax detects and highlights Dart statements, reserved words,
    type declarations, storage classes, conditionals, loops, interpolated values,
    and comments.  There is no support idioms from Flutter or any other Dart
    framework.

    Changes, fixes?  Submit an issue or pull request via:

    https://github.com/pr3d4t0r/dart-vim-syntax/

    DESKTOP					   *desktop.vim* *ft-desktop-syntax*

    Primary goal of this syntax file is to highlight .desktop and .directory files
    according to freedesktop.org standard:
    http://standards.freedesktop.org/desktop-entry-spec/latest/
    But actually almost none implements this standard fully.  Thus it will
    highlight all Unix ini files.  But you can force strict highlighting according
    to standard by placing this in your vimrc file:
    	:let enforce_freedesktop_standard = 1

    DIFF							*diff.vim*

    The diff highlighting normally finds translated headers.  This can be slow if
    there are very long lines in the file.  To disable translations:

    	:let diff_translations = 0

    Also see |diff-slow|.

    DIRCOLORS			       *dircolors.vim* *ft-dircolors-syntax*

    The dircolors utility highlighting definition has one option.  It exists to
    provide compatibility with the Slackware GNU/Linux distributions version of
    the command.  It adds a few keywords that are generally ignored by most
    versions.  On Slackware systems, however, the utility accepts the keywords and
    uses them for processing.  To enable the Slackware keywords add the following
    line to your startup file:
    	let dircolors_is_slackware = 1

    DOCBOOK					*docbk.vim* *ft-docbk-syntax* *docbook*
    DOCBOOK XML				*docbkxml.vim* *ft-docbkxml-syntax*
    DOCBOOK SGML				*docbksgml.vim* *ft-docbksgml-syntax*

    There are two types of DocBook files: SGML and XML.  To specify what type you
    are using the "b:docbk_type" variable should be set.  Vim does this for you
    automatically if it can recognize the type.  When Vim can't guess it the type
    defaults to XML.
    You can set the type manually:
    	:let docbk_type = "sgml"
    or:
    	:let docbk_type = "xml"
    You need to do this before loading the syntax file, which is complicated.
    Simpler is setting the filetype to "docbkxml" or "docbksgml":
    	:set filetype=docbksgml
    or:
    	:set filetype=docbkxml

    You can specify the DocBook version:
    	:let docbk_ver = 3
    When not set 4 is used.

    DOSBATCH				*dosbatch.vim* *ft-dosbatch-syntax*

    There is one option with highlighting DOS batch files.	This covers new
    extensions to the Command Interpreter introduced with Windows 2000 and
    is controlled by the variable dosbatch_cmdextversion.  For Windows NT
    this should have the value 1, and for Windows 2000 it should be 2.
    Select the version you want with the following line:

       :let dosbatch_cmdextversion = 1

    If this variable is not defined it defaults to a value of 2 to support
    Windows 2000.

    A second option covers whether *.btm files should be detected as type
    "dosbatch" (MS-DOS batch files) or type "btm" (4DOS batch files).  The latter
    is used by default.  You may select the former with the following line:

       :let g:dosbatch_syntax_for_btm = 1

    If this variable is undefined or zero, btm syntax is selected.

    DOXYGEN						*doxygen.vim* *doxygen-syntax*

    Doxygen generates code documentation using a special documentation format
    (similar to Javadoc).  This syntax script adds doxygen highlighting to c, cpp,
    idl and php files, and should also work with java.

    There are a few of ways to turn on doxygen formatting. It can be done
    explicitly or in a modeline by appending '.doxygen' to the syntax of the file.
    Example:
    	:set syntax=c.doxygen
    or
    	// vim:syntax=c.doxygen

    It can also be done automatically for C, C++, C#, IDL and PHP files by setting
    the global or buffer-local variable load_doxygen_syntax.  This is done by
    adding the following to your .vimrc.
    	:let g:load_doxygen_syntax=1

    There are a couple of variables that have an effect on syntax highlighting, and
    are to do with non-standard highlighting options.

    Variable			Default	Effect
    g:doxygen_enhanced_color
    g:doxygen_enhanced_colour	0	Use non-standard highlighting for
    					doxygen comments.

    doxygen_my_rendering		0	Disable rendering of HTML bold, italic
    					and html_my_rendering underline.

    doxygen_javadoc_autobrief	1	Set to 0 to disable javadoc autobrief
    					colour highlighting.

    doxygen_end_punctuation		'[.]'	Set to regexp match for the ending
    					punctuation of brief

    There are also some highlight groups worth mentioning as they can be useful in
    configuration.

    Highlight			Effect
    doxygenErrorComment		The colour of an end-comment when missing
    				punctuation in a code, verbatim or dot section
    doxygenLinkError		The colour of an end-comment when missing the
    				\endlink from a \link section.

    DTD						*dtd.vim* *ft-dtd-syntax*

    The DTD syntax highlighting is case sensitive by default.  To disable
    case-sensitive highlighting, add the following line to your startup file:

    	:let dtd_ignore_case=1

    The DTD syntax file will highlight unknown tags as errors.  If
    this is annoying, it can be turned off by setting:

    	:let dtd_no_tag_errors=1

    before sourcing the dtd.vim syntax file.
    Parameter entity names are highlighted in the definition using the
    'Type' highlighting group and 'Comment' for punctuation and '%'.
    Parameter entity instances are highlighted using the 'Constant'
    highlighting group and the 'Type' highlighting group for the
    delimiters % and ;.  This can be turned off by setting:

    	:let dtd_no_param_entities=1

    The DTD syntax file is also included by xml.vim to highlight included dtd's.

    EIFFEL					*eiffel.vim* *ft-eiffel-syntax*

    While Eiffel is not case-sensitive, its style guidelines are, and the
    syntax highlighting file encourages their use.  This also allows to
    highlight class names differently.  If you want to disable case-sensitive
    highlighting, add the following line to your startup file:

    	:let eiffel_ignore_case=1

    Case still matters for class names and TODO marks in comments.

    Conversely, for even stricter checks, add one of the following lines:

    	:let eiffel_strict=1
    	:let eiffel_pedantic=1

    Setting eiffel_strict will only catch improper capitalization for the
    five predefined words "Current", "Void", "Result", "Precursor", and
    "NONE", to warn against their accidental use as feature or class names.

    Setting eiffel_pedantic will enforce adherence to the Eiffel style
    guidelines fairly rigorously (like arbitrary mixes of upper- and
    lowercase letters as well as outdated ways to capitalize keywords).

    If you want to use the lower-case version of "Current", "Void",
    "Result", and "Precursor", you can use

    	:let eiffel_lower_case_predef=1

    instead of completely turning case-sensitive highlighting off.

    Support for ISE's proposed new creation syntax that is already
    experimentally handled by some compilers can be enabled by:

    	:let eiffel_ise=1

    Finally, some vendors support hexadecimal constants.  To handle them, add

    	:let eiffel_hex_constants=1

    to your startup file.

    EUPHORIA	    *euphoria3.vim* *euphoria4.vim* *ft-euphoria-syntax*

    Two syntax highlighting files exists for Euphoria. One for Euphoria
    version 3.1.1, which is the default syntax highlighting file, and one for
    Euphoria version 4.0.5 or later.

    Euphoria version 3.1.1 (http://www.rapideuphoria.com/) is still necessary
    for developing applications for the DOS platform, which Euphoria version 4
    (http://www.openeuphoria.org/) does not support.

    The following file extensions are auto-detected as Euphoria file type:

    	*.e, *.eu, *.ew, *.ex, *.exu, *.exw
    	*.E, *.EU, *.EW, *.EX, *.EXU, *.EXW

    To select syntax highlighting file for Euphoria, as well as for
    auto-detecting the *.e and *.E file extensions as Euphoria file type,
    add the following line to your startup file:

    	:let filetype_euphoria="euphoria3"

    	or

    	:let filetype_euphoria="euphoria4"

    ERLANG						*erlang.vim* *ft-erlang-syntax*

    Erlang is a functional programming language developed by Ericsson.  Files with
    the following extensions are recognized as Erlang files: erl, hrl, yaws.

    The BIFs (built-in functions) are highlighted by default. To disable this,
    put the following line in your vimrc:

          :let g:erlang_highlight_bifs = 0

    To enable highlighting some special atoms, put this in your vimrc:

          :let g:erlang_highlight_special_atoms = 1

    FLEXWIKI				*flexwiki.vim* *ft-flexwiki-syntax*

    FlexWiki is an ASP.NET-based wiki package available at http://www.flexwiki.com
    NOTE: this site currently doesn't work, on Wikipedia is mentioned that
    development stopped in 2009.

    Syntax highlighting is available for the most common elements of FlexWiki
    syntax. The associated ftplugin script sets some buffer-local options to make
    editing FlexWiki pages more convenient. FlexWiki considers a newline as the
    start of a new paragraph, so the ftplugin sets 'tw'=0 (unlimited line length),
    'wrap' (wrap long lines instead of using horizontal scrolling), 'linebreak'
    (to wrap at a character in 'breakat' instead of at the last char on screen),
    and so on. It also includes some keymaps that are disabled by default.

    If you want to enable the keymaps that make "j" and "k" and the cursor keys
    move up and down by display lines, add this to your .vimrc:
    	:let flexwiki_maps = 1

    FORM						*form.vim* *ft-form-syntax*

    The coloring scheme for syntax elements in the FORM file uses the default
    modes Conditional, Number, Statement, Comment, PreProc, Type, and String,
    following the language specifications in 'Symbolic Manipulation with FORM' by
    J.A.M. Vermaseren, CAN, Netherlands, 1991.

    If you want include your own changes to the default colors, you have to
    redefine the following syntax groups:

        - formConditional
        - formNumber
        - formStatement
        - formHeaderStatement
        - formComment
        - formPreProc
        - formDirective
        - formType
        - formString

    Note that the form.vim syntax file implements FORM preprocessor commands and
    directives per default in the same syntax group.

    A predefined enhanced color mode for FORM is available to distinguish between
    header statements and statements in the body of a FORM program.  To activate
    this mode define the following variable in your vimrc file

    	:let form_enhanced_color=1

    The enhanced mode also takes advantage of additional color features for a dark
    gvim display.  Here, statements are colored LightYellow instead of Yellow, and
    conditionals are LightBlue for better distinction.

    FORTRAN					*fortran.vim* *ft-fortran-syntax*

    Default highlighting and dialect
    Highlighting appropriate for Fortran 2008 is used by default.  This choice
    should be appropriate for most users most of the time because Fortran 2008 is
    almost a superset of previous versions (Fortran 2003, 95, 90, and 77).

    Fortran source code form
    Fortran code can be in either fixed or free source form.  Note that the
    syntax highlighting will not be correct if the form is incorrectly set.

    When you create a new fortran file, the syntax script assumes fixed source
    form.  If you always use free source form, then
        :let fortran_free_source=1
    in your .vimrc prior to the :syntax on command.  If you always use fixed source
    form, then
        :let fortran_fixed_source=1
    in your .vimrc prior to the :syntax on command.

    If the form of the source code depends, in a non-standard way, upon the file
    extension, then it is most convenient to set fortran_free_source in a ftplugin
    file.  For more information on ftplugin files, see |ftplugin|. Note that this
    will work only if the "filetype plugin indent on" command precedes the "syntax
    on" command in your .vimrc file.

    When you edit an existing fortran file, the syntax script will assume free
    source form if the fortran_free_source variable has been set, and assumes
    fixed source form if the fortran_fixed_source variable has been set.  If
    neither of these variables have been set, the syntax script attempts to
    determine which source form has been used by examining the file extension
    using conventions common to the ifort, gfortran, Cray, NAG, and PathScale
    compilers (.f, .for, .f77 for fixed-source, .f90, .f95, .f03, .f08 for
    free-source). If none of this works, then the script examines the first five
    columns of the first 500 lines of your file.  If no signs of free source form
    are detected, then the file is assumed to be in fixed source form.  The
    algorithm should work in the vast majority of cases.  In some cases, such as a
    file that begins with 500 or more full-line comments, the script may
    incorrectly decide that the fortran code is in fixed form.  If that happens,
    just add a non-comment statement beginning anywhere in the first five columns
    of the first twenty-five lines, save (:w) and then reload (:e!) the file.

    Tabs in fortran files
    Tabs are not recognized by the Fortran standards.  Tabs are not a good idea in
    fixed format fortran source code which requires fixed column boundaries.
    Therefore, tabs are marked as errors.  Nevertheless, some programmers like
    using tabs.  If your fortran files contain tabs, then you should set the
    variable fortran_have_tabs in your .vimrc with a command such as
        :let fortran_have_tabs=1
    placed prior to the :syntax on command.  Unfortunately, the use of tabs will
    mean that the syntax file will not be able to detect incorrect margins.

    Syntax folding of fortran files
    If you wish to use foldmethod=syntax, then you must first set the variable
    fortran_fold with a command such as
        :let fortran_fold=1
    to instruct the syntax script to define fold regions for program units, that
    is main programs starting with a program statement, subroutines, function
    subprograms, block data subprograms, interface blocks, and modules.  If you
    also set the variable fortran_fold_conditionals with a command such as
        :let fortran_fold_conditionals=1
    then fold regions will also be defined for do loops, if blocks, and select
    case constructs.  If you also set the variable
    fortran_fold_multilinecomments with a command such as
        :let fortran_fold_multilinecomments=1
    then fold regions will also be defined for three or more consecutive comment
    lines.  Note that defining fold regions can be slow for large files.

    If fortran_fold, and possibly fortran_fold_conditionals and/or
    fortran_fold_multilinecomments, have been set, then vim will fold your file if
    you set foldmethod=syntax.  Comments or blank lines placed between two program
    units are not folded because they are seen as not belonging to any program
    unit.

    More precise fortran syntax
    If you set the variable fortran_more_precise with a command such as
        :let fortran_more_precise=1
    then the syntax coloring will be more precise but slower.  In particular,
    statement labels used in do, goto and arithmetic if statements will be
    recognized, as will construct names at the end of a do, if, select or forall
    construct.

    Non-default fortran dialects
    The syntax script supports two Fortran dialects: f08 and F. You will probably
    find the default highlighting (f08) satisfactory.  A few legacy constructs
    deleted or declared obsolescent in the 2008 standard are highlighted as todo
    items.

    If you use F, the advantage of setting the dialect appropriately is that
    other legacy features excluded from F will be highlighted as todo items and
    that free source form will be assumed.

    The dialect can be selected in various ways.  If all your fortran files use
    the same dialect, set the global variable fortran_dialect in your .vimrc prior
    to your syntax on statement.  The case-sensitive, permissible values of
    fortran_dialect are "f08" or "F".  Invalid values of fortran_dialect are
    ignored.

    If the dialect depends upon the file extension, then it is most convenient to
    set a buffer-local variable in a ftplugin file.  For more information on
    ftplugin files, see |ftplugin|.  For example, if all your fortran files with
    an .f90 extension are written in the F subset, your ftplugin file should
    contain the code
        let s:extfname = expand("%:e")
        if s:extfname ==? "f90"
    	let b:fortran_dialect="F"
        else
    	unlet! b:fortran_dialect
        endif
    Note that this will work only if the "filetype plugin indent on" command
    precedes the "syntax on" command in your .vimrc file.

    Finer control is necessary if the file extension does not uniquely identify
    the dialect.  You can override the default dialect, on a file-by-file basis,
    by including a comment with the directive "fortran_dialect=xx" (where xx=F or
    f08) in one of the first three lines in your file.  For example, your older .f
    files may be legacy code but your newer ones may be F codes, and you would
    identify the latter by including in the first three lines of those files a
    Fortran comment of the form
      ! fortran_dialect=F

    For previous versions of the syntax, you may have set fortran_dialect to the
    now-obsolete values "f77", "f90", "f95", or "elf". Such settings will be
    silently handled as "f08". Users of "elf" may wish to experiment with "F"
    instead.

    The syntax/fortran.vim script contains embedded comments that tell you how to
    comment and/or uncomment some lines to (a) activate recognition of some
    non-standard, vendor-supplied intrinsics and (b) to prevent features deleted
    or declared obsolescent in the 2008 standard from being highlighted as todo
    items.

    Limitations
    Parenthesis checking does not catch too few closing parentheses.  Hollerith
    strings are not recognized.  Some keywords may be highlighted incorrectly
    because Fortran90 has no reserved words.

    For further information related to fortran, see |ft-fortran-indent| and
    |ft-fortran-plugin|.

    FVWM CONFIGURATION FILES			*fvwm.vim* *ft-fvwm-syntax*

    In order for Vim to recognize Fvwm configuration files that do not match
    the patterns *fvwmrc* or *fvwm2rc* , you must put additional patterns
    appropriate to your system in your myfiletypes.vim file.  For these
    patterns, you must set the variable "b:fvwm_version" to the major version
    number of Fvwm, and the 'filetype' option to fvwm.

    For example, to make Vim identify all files in /etc/X11/fvwm2/
    as Fvwm2 configuration files, add the following:

      :au! BufNewFile,BufRead /etc/X11/fvwm2/*  let b:fvwm_version = 2 |
    					 \ set filetype=fvwm

    If you'd like Vim to highlight all valid color names, tell it where to
    find the color database (rgb.txt) on your system.  Do this by setting
    "rgb_file" to its location.  Assuming your color database is located
    in /usr/X11/lib/X11/, you should add the line

    	:let rgb_file = "/usr/X11/lib/X11/rgb.txt"

    to your .vimrc file.

    GSP						*gsp.vim* *ft-gsp-syntax*

    The default coloring style for GSP pages is defined by |html.vim|, and
    the coloring for java code (within java tags or inline between backticks)
    is defined by |java.vim|.  The following HTML groups defined in |html.vim|
    are redefined to incorporate and highlight inline java code:

        htmlString
        htmlValue
        htmlEndTag
        htmlTag
        htmlTagN

    Highlighting should look fine most of the places where you'd see inline
    java code, but in some special cases it may not.  To add another HTML
    group where you will have inline java code where it does not highlight
    correctly, just copy the line you want from |html.vim| and add gspJava
    to the contains clause.

    The backticks for inline java are highlighted according to the htmlError
    group to make them easier to see.

    GROFF						*groff.vim* *ft-groff-syntax*

    The groff syntax file is a wrapper for |nroff.vim|, see the notes
    under that heading for examples of use and configuration.  The purpose
    of this wrapper is to set up groff syntax extensions by setting the
    filetype from a |modeline| or in a personal filetype definitions file
    (see |filetype|).

    HASKELL			     *haskell.vim* *lhaskell.vim* *ft-haskell-syntax*

    The Haskell syntax files support plain Haskell code as well as literate
    Haskell code, the latter in both Bird style and TeX style.  The Haskell
    syntax highlighting will also highlight C preprocessor directives.

    If you want to highlight delimiter characters (useful if you have a
    light-coloured background), add to your .vimrc:
    	:let hs_highlight_delimiters = 1
    To treat True and False as keywords as opposed to ordinary identifiers,
    add:
    	:let hs_highlight_boolean = 1
    To also treat the names of primitive types as keywords:
    	:let hs_highlight_types = 1
    And to treat the names of even more relatively common types as keywords:
    	:let hs_highlight_more_types = 1
    If you want to highlight the names of debugging functions, put in
    your .vimrc:
    	:let hs_highlight_debug = 1

    The Haskell syntax highlighting also highlights C preprocessor
    directives, and flags lines that start with # but are not valid
    directives as erroneous.  This interferes with Haskell's syntax for
    operators, as they may start with #.  If you want to highlight those
    as operators as opposed to errors, put in your .vimrc:
    	:let hs_allow_hash_operator = 1

    The syntax highlighting for literate Haskell code will try to
    automatically guess whether your literate Haskell code contains
    TeX markup or not, and correspondingly highlight TeX constructs
    or nothing at all.  You can override this globally by putting
    in your .vimrc
    	:let lhs_markup = none
    for no highlighting at all, or
    	:let lhs_markup = tex
    to force the highlighting to always try to highlight TeX markup.
    For more flexibility, you may also use buffer local versions of
    this variable, so e.g.
    	:let b:lhs_markup = tex
    will force TeX highlighting for a particular buffer.  It has to be
    set before turning syntax highlighting on for the buffer or
    loading a file.

    HTML						*html.vim* *ft-html-syntax*

    The coloring scheme for tags in the HTML file works as follows.

    The  <> of opening tags are colored differently than the </> of a closing tag.
    This is on purpose! For opening tags the 'Function' color is used, while for
    closing tags the 'Type' color is used (See syntax.vim to check how those are
    defined for you)

    Known tag names are colored the same way as statements in C.  Unknown tag
    names are colored with the same color as the <> or </> respectively which
    makes it easy to spot errors

    Note that the same is true for argument (or attribute) names.  Known attribute
    names are colored differently than unknown ones.

    Some HTML tags are used to change the rendering of text.  The following tags
    are recognized by the html.vim syntax coloring file and change the way normal
    text is shown: <B> <I> <U> <EM> <STRONG> (<EM> is used as an alias for <I>,
    while <STRONG> as an alias for <B>), <H1> - <H6>, <HEAD>, <TITLE> and <A>, but
    only if used as a link (that is, it must include a href as in
    <A href="somefile.html">).

    If you want to change how such text is rendered, you must redefine the
    following syntax groups:

        - htmlBold
        - htmlBoldUnderline
        - htmlBoldUnderlineItalic
        - htmlUnderline
        - htmlUnderlineItalic
        - htmlItalic
        - htmlTitle for titles
        - htmlH1 - htmlH6 for headings

    To make this redefinition work you must redefine them all with the exception
    of the last two (htmlTitle and htmlH[1-6], which are optional) and define the
    following variable in your vimrc (this is due to the order in which the files
    are read during initialization)
    	:let html_my_rendering=1

    If you'd like to see an example download mysyntax.vim at
    http://www.fleiner.com/vim/download.html

    You can also disable this rendering by adding the following line to your
    vimrc file:
    	:let html_no_rendering=1

    HTML comments are rather special (see an HTML reference document for the
    details), and the syntax coloring scheme will highlight all errors.
    However, if you prefer to use the wrong style (starts with <!-- and
    ends with -->) you can define
    	:let html_wrong_comments=1

    JavaScript and Visual Basic embedded inside HTML documents are highlighted as
    'Special' with statements, comments, strings and so on colored as in standard
    programming languages.  Note that only JavaScript and Visual Basic are currently
    supported, no other scripting language has been added yet.

    Embedded and inlined cascading style sheets (CSS) are highlighted too.

    There are several html preprocessor languages out there.  html.vim has been
    written such that it should be trivial to include it.  To do so add the
    following two lines to the syntax coloring file for that language
    (the example comes from the asp.vim file):

        runtime! syntax/html.vim
        syn cluster htmlPreproc add=asp

    Now you just need to make sure that you add all regions that contain
    the preprocessor language to the cluster htmlPreproc.

    HTML/OS (by Aestiva)				*htmlos.vim* *ft-htmlos-syntax*

    The coloring scheme for HTML/OS works as follows:

    Functions and variable names are the same color by default, because VIM
    doesn't specify different colors for Functions and Identifiers.  To change
    this (which is recommended if you want function names to be recognizable in a
    different color) you need to add the following line to either your ~/.vimrc:
      :hi Function term=underline cterm=bold ctermfg=LightGray

    Of course, the ctermfg can be a different color if you choose.

    Another issues that HTML/OS runs into is that there is no special filetype to
    signify that it is a file with HTML/OS coding.	You can change this by opening
    a file and turning on HTML/OS syntax by doing the following:
      :set syntax=htmlos

    Lastly, it should be noted that the opening and closing characters to begin a
    block of HTML/OS code can either be << or [[ and >> or ]], respectively.

    IA64				*ia64.vim* *intel-itanium* *ft-ia64-syntax*

    Highlighting for the Intel Itanium 64 assembly language.  See |asm.vim| for
    how to recognize this filetype.

    To have *.inc files be recognized as IA64, add this to your .vimrc file:
    	:let g:filetype_inc = "ia64"

    INFORM						*inform.vim* *ft-inform-syntax*

    Inform highlighting includes symbols provided by the Inform Library, as
    most programs make extensive use of it.  If do not wish Library symbols
    to be highlighted add this to your vim startup:
    	:let inform_highlight_simple=1

    By default it is assumed that Inform programs are Z-machine targeted,
    and highlights Z-machine assembly language symbols appropriately.  If
    you intend your program to be targeted to a Glulx/Glk environment you
    need to add this to your startup sequence:
    	:let inform_highlight_glulx=1

    This will highlight Glulx opcodes instead, and also adds glk() to the
    set of highlighted system functions.

    The Inform compiler will flag certain obsolete keywords as errors when
    it encounters them.  These keywords are normally highlighted as errors
    by Vim.  To prevent such error highlighting, you must add this to your
    startup sequence:
    	:let inform_suppress_obsolete=1

    By default, the language features highlighted conform to Compiler
    version 6.30 and Library version 6.11.  If you are using an older
    Inform development environment, you may with to add this to your
    startup sequence:
    	:let inform_highlight_old=1

    IDL							*idl.vim* *idl-syntax*

    IDL (Interface Definition Language) files are used to define RPC calls.  In
    Microsoft land, this is also used for defining COM interfaces and calls.

    IDL's structure is simple enough to permit a full grammar based approach to
    rather than using a few heuristics.  The result is large and somewhat
    repetitive but seems to work.

    There are some Microsoft extensions to idl files that are here.  Some of them
    are disabled by defining idl_no_ms_extensions.

    The more complex of the extensions are disabled by defining idl_no_extensions.

    Variable			Effect

    idl_no_ms_extensions		Disable some of the Microsoft specific
    				extensions
    idl_no_extensions		Disable complex extensions
    idlsyntax_showerror		Show IDL errors (can be rather intrusive, but
    				quite helpful)
    idlsyntax_showerror_soft	Use softer colours by default for errors

    JAVA						*java.vim* *ft-java-syntax*

    The java.vim syntax highlighting file offers several options:

    In Java 1.0.2 it was never possible to have braces inside parens, so this was
    flagged as an error.  Since Java 1.1 this is possible (with anonymous
    classes), and therefore is no longer marked as an error.  If you prefer the old
    way, put the following line into your vim startup file:
    	:let java_mark_braces_in_parens_as_errors=1

    All identifiers in java.lang.* are always visible in all classes.  To
    highlight them use:
    	:let java_highlight_java_lang_ids=1

    You can also highlight identifiers of most standard Java packages if you
    download the javaid.vim script at http://www.fleiner.com/vim/download.html.
    If you prefer to only highlight identifiers of a certain package, say java.io
    use the following:
    	:let java_highlight_java_io=1
    Check the javaid.vim file for a list of all the packages that are supported.

    Function names are not highlighted, as the way to find functions depends on
    how you write Java code.  The syntax file knows two possible ways to highlight
    functions:

    If you write function declarations that are always indented by either
    a tab, 8 spaces or 2 spaces you may want to set
    	:let java_highlight_functions="indent"
    However, if you follow the Java guidelines about how functions and classes are
    supposed to be named (with respect to upper and lowercase), use
    	:let java_highlight_functions="style"
    If both options do not work for you, but you would still want function
    declarations to be highlighted create your own definitions by changing the
    definitions in java.vim or by creating your own java.vim which includes the
    original one and then adds the code to highlight functions.

    In Java 1.1 the functions System.out.println() and System.err.println() should
    only be used for debugging.  Therefore it is possible to highlight debugging
    statements differently.  To do this you must add the following definition in
    your startup file:
    	:let java_highlight_debug=1
    The result will be that those statements are highlighted as 'Special'
    characters.  If you prefer to have them highlighted differently you must define
    new highlightings for the following groups.:
        Debug, DebugSpecial, DebugString, DebugBoolean, DebugType
    which are used for the statement itself, special characters used in debug
    strings, strings, boolean constants and types (this, super) respectively.  I
    have opted to chose another background for those statements.

    Javadoc is a program that takes special comments out of Java program files and
    creates HTML pages.  The standard configuration will highlight this HTML code
    similarly to HTML files (see |html.vim|).  You can even add Javascript
    and CSS inside this code (see below).  There are four differences however:
      1. The title (all characters up to the first '.' which is followed by
         some white space or up to the first '@') is colored differently (to change
         the color change the group CommentTitle).
      2. The text is colored as 'Comment'.
      3. HTML comments are colored as 'Special'
      4. The special Javadoc tags (@see, @param, ...) are highlighted as specials
         and the argument (for @see, @param, @exception) as Function.
    To turn this feature off add the following line to your startup file:
    	:let java_ignore_javadoc=1

    If you use the special Javadoc comment highlighting described above you
    can also turn on special highlighting for Javascript, visual basic
    scripts and embedded CSS (stylesheets).  This makes only sense if you
    actually have Javadoc comments that include either Javascript or embedded
    CSS.  The options to use are
    	:let java_javascript=1
    	:let java_css=1
    	:let java_vb=1

    In order to highlight nested parens with different colors define colors
    for javaParen, javaParen1 and javaParen2, for example with
    	:hi link javaParen Comment
    or
    	:hi javaParen ctermfg=blue guifg=#0000ff

    If you notice highlighting errors while scrolling backwards, which are fixed
    when redrawing with CTRL-L, try setting the "java_minlines" internal variable
    to a larger number:
    	:let java_minlines = 50
    This will make the syntax synchronization start 50 lines before the first
    displayed line.  The default value is 10.  The disadvantage of using a larger
    number is that redrawing can become slow.

    JSON						*json.vim* *ft-json-syntax*

    The json syntax file provides syntax highlighting with conceal support by
    default. To disable concealment:
    	let g:vim_json_conceal = 0

    To disable syntax highlighting of errors:
    	let g:vim_json_warnings = 0

    LACE						*lace.vim* *ft-lace-syntax*

    Lace (Language for Assembly of Classes in Eiffel) is case insensitive, but the
    style guide lines are not.  If you prefer case insensitive highlighting, just
    define the vim variable 'lace_case_insensitive' in your startup file:
    	:let lace_case_insensitive=1

    LEX						*lex.vim* *ft-lex-syntax*

    Lex uses brute-force synchronizing as the "^%%$" section delimiter
    gives no clue as to what section follows.  Consequently, the value for
    	:syn sync minlines=300
    may be changed by the user if s/he is experiencing synchronization
    difficulties (such as may happen with large lex files).

    LIFELINES				*lifelines.vim* *ft-lifelines-syntax*

    To highlight deprecated functions as errors, add in your .vimrc:

    	:let g:lifelines_deprecated = 1

    LISP						*lisp.vim* *ft-lisp-syntax*

    The lisp syntax highlighting provides two options:

    	g:lisp_instring : if it exists, then "(...)" strings are highlighted
    			  as if the contents of the string were lisp.
    			  Useful for AutoLisp.
    	g:lisp_rainbow  : if it exists and is nonzero, then differing levels
    			  of parenthesization will receive different
    			  highlighting.

    The g:lisp_rainbow option provides 10 levels of individual colorization for
    the parentheses and backquoted parentheses.  Because of the quantity of
    colorization levels, unlike non-rainbow highlighting, the rainbow mode
    specifies its highlighting using ctermfg and guifg, thereby bypassing the
    usual color scheme control using standard highlighting groups.  The actual
    highlighting used depends on the dark/bright setting  (see |'bg'|).

    LITE						*lite.vim* *ft-lite-syntax*

    There are two options for the lite syntax highlighting.

    If you like SQL syntax highlighting inside Strings, use this:

    	:let lite_sql_query = 1

    For syncing, minlines defaults to 100.	If you prefer another value, you can
    set "lite_minlines" to the value you desire.  Example:

    	:let lite_minlines = 200

    LPC						*lpc.vim* *ft-lpc-syntax*

    LPC stands for a simple, memory-efficient language: Lars Pensjö C.  The
    file name of LPC is usually *.c.  Recognizing these files as LPC would bother
    users writing only C programs.	If you want to use LPC syntax in Vim, you
    should set a variable in your .vimrc file:

    	:let lpc_syntax_for_c = 1

    If it doesn't work properly for some particular C or LPC files, use a
    modeline.  For a LPC file:

    	// vim:set ft=lpc:

    For a C file that is recognized as LPC:

    	// vim:set ft=c:

    If you don't want to set the variable, use the modeline in EVERY LPC file.

    There are several implementations for LPC, we intend to support most widely
    used ones.  Here the default LPC syntax is for MudOS series, for MudOS v22
    and before, you should turn off the sensible modifiers, and this will also
    assert the new efuns after v22 to be invalid, don't set this variable when
    you are using the latest version of MudOS:

    	:let lpc_pre_v22 = 1

    For LpMud 3.2 series of LPC:

    	:let lpc_compat_32 = 1

    For LPC4 series of LPC:

    	:let lpc_use_lpc4_syntax = 1

    For uLPC series of LPC:
    uLPC has been developed to Pike, so you should use Pike syntax
    instead, and the name of your source file should be *.pike

    LUA						*lua.vim* *ft-lua-syntax*

    The Lua syntax file can be used for versions 4.0, 5.0, 5.1 and 5.2 (5.2 is
    the default). You can select one of these versions using the global variables
    lua_version and lua_subversion. For example, to activate Lua
    5.1 syntax highlighting, set the variables like this:

    	:let lua_version = 5
    	:let lua_subversion = 1

    MAIL						*mail.vim* *ft-mail.vim*

    Vim highlights all the standard elements of an email (headers, signatures,
    quoted text and URLs / email addresses).  In keeping with standard conventions,
    signatures begin in a line containing only "--" followed optionally by
    whitespaces and end with a newline.

    Vim treats lines beginning with ']', '}', '|', '>' or a word followed by '>'
    as quoted text.  However Vim highlights headers and signatures in quoted text
    only if the text is quoted with '>' (optionally followed by one space).

    By default mail.vim synchronises syntax to 100 lines before the first
    displayed line.  If you have a slow machine, and generally deal with emails
    with short headers, you can change this to a smaller value:

        :let mail_minlines = 30

    MAKE						*make.vim* *ft-make-syntax*

    In makefiles, commands are usually highlighted to make it easy for you to spot
    errors.  However, this may be too much coloring for you.  You can turn this
    feature off by using:

    	:let make_no_commands = 1

    MAPLE						*maple.vim* *ft-maple-syntax*

    Maple V, by Waterloo Maple Inc, supports symbolic algebra.  The language
    supports many packages of functions which are selectively loaded by the user.
    The standard set of packages' functions as supplied in Maple V release 4 may be
    highlighted at the user's discretion.  Users may place in their .vimrc file:

    	:let mvpkg_all= 1

    to get all package functions highlighted, or users may select any subset by
    choosing a variable/package from the table below and setting that variable to
    1, also in their .vimrc file (prior to sourcing
    $VIMRUNTIME/syntax/syntax.vim).

    	Table of Maple V Package Function Selectors
      mv_DEtools	 mv_genfunc	mv_networks	mv_process
      mv_Galois	 mv_geometry	mv_numapprox	mv_simplex
      mv_GaussInt	 mv_grobner	mv_numtheory	mv_stats
      mv_LREtools	 mv_group	mv_orthopoly	mv_student
      mv_combinat	 mv_inttrans	mv_padic	mv_sumtools
      mv_combstruct mv_liesymm	mv_plots	mv_tensor
      mv_difforms	 mv_linalg	mv_plottools	mv_totorder
      mv_finance	 mv_logic	mv_powseries

    MATHEMATICA		*mma.vim* *ft-mma-syntax* *ft-mathematica-syntax*

    Empty *.m files will automatically be presumed to be Matlab files unless you
    have the following in your .vimrc:

    	let filetype_m = "mma"

    MOO						*moo.vim* *ft-moo-syntax*

    If you use C-style comments inside expressions and find it mangles your
    highlighting, you may want to use extended (slow!) matches for C-style
    comments:

    	:let moo_extended_cstyle_comments = 1

    To disable highlighting of pronoun substitution patterns inside strings:

    	:let moo_no_pronoun_sub = 1

    To disable highlighting of the regular expression operator '%|', and matching
    '%(' and '%)' inside strings:

    	:let moo_no_regexp = 1

    Unmatched double quotes can be recognized and highlighted as errors:

    	:let moo_unmatched_quotes = 1

    To highlight builtin properties (.name, .location, .programmer etc.):

    	:let moo_builtin_properties = 1

    Unknown builtin functions can be recognized and highlighted as errors.  If you
    use this option, add your own extensions to the mooKnownBuiltinFunction group.
    To enable this option:

    	:let moo_unknown_builtin_functions = 1

    An example of adding sprintf() to the list of known builtin functions:

    	:syn keyword mooKnownBuiltinFunction sprintf contained

    MSQL						*msql.vim* *ft-msql-syntax*

    There are two options for the msql syntax highlighting.

    If you like SQL syntax highlighting inside Strings, use this:

    	:let msql_sql_query = 1

    For syncing, minlines defaults to 100.	If you prefer another value, you can
    set "msql_minlines" to the value you desire.  Example:

    	:let msql_minlines = 200

    N1QL						*n1ql.vim* *ft-n1ql-syntax*

    N1QL is a SQL-like declarative language for manipulating JSON documents in
    Couchbase Server databases.

    Vim syntax highlights N1QL statements, keywords, operators, types, comments,
    and special values.  Vim ignores syntactical elements specific to SQL or its
    many dialects, like COLUMN or CHAR, that don't exist in N1QL.

    NCF						*ncf.vim* *ft-ncf-syntax*

    There is one option for NCF syntax highlighting.

    If you want to have unrecognized (by ncf.vim) statements highlighted as
    errors, use this:

    	:let ncf_highlight_unknowns = 1

    If you don't want to highlight these errors, leave it unset.

    NROFF						*nroff.vim* *ft-nroff-syntax*

    The nroff syntax file works with AT&T n/troff out of the box.  You need to
    activate the GNU groff extra features included in the syntax file before you
    can use them.

    For example, Linux and BSD distributions use groff as their default text
    processing package.  In order to activate the extra syntax highlighting
    features for groff, add the following option to your start-up files:

      :let b:nroff_is_groff = 1

    Groff is different from the old AT&T n/troff that you may still find in
    Solaris.  Groff macro and request names can be longer than 2 characters and
    there are extensions to the language primitives.  For example, in AT&T troff
    you access the year as a 2-digit number with the request \(yr.  In groff you
    can use the same request, recognized for compatibility, or you can use groff's
    native syntax, \[yr].  Furthermore, you can use a 4-digit year directly:
    \[year].  Macro requests can be longer than 2 characters, for example, GNU mm
    accepts the requests ".VERBON" and ".VERBOFF" for creating verbatim
    environments.

    In order to obtain the best formatted output g/troff can give you, you should
    follow a few simple rules about spacing and punctuation.

    1. Do not leave empty spaces at the end of lines.

    2. Leave one space and one space only after an end-of-sentence period,
       exclamation mark, etc.

    3. For reasons stated below, it is best to follow all period marks with a
       carriage return.

    The reason behind these unusual tips is that g/n/troff have a line breaking
    algorithm that can be easily upset if you don't follow the rules given above.

    Unlike TeX, troff fills text line-by-line, not paragraph-by-paragraph and,
    furthermore, it does not have a concept of glue or stretch, all horizontal and
    vertical space input will be output as is.

    Therefore, you should be careful about not using more space between sentences
    than you intend to have in your final document.  For this reason, the common
    practice is to insert a carriage return immediately after all punctuation
    marks.  If you want to have "even" text in your final processed output, you
    need to maintain regular spacing in the input text.  To mark both trailing
    spaces and two or more spaces after a punctuation as an error, use:

      :let nroff_space_errors = 1

    Another technique to detect extra spacing and other errors that will interfere
    with the correct typesetting of your file, is to define an eye-catching
    highlighting definition for the syntax groups "nroffDefinition" and
    "nroffDefSpecial" in your configuration files.  For example:

      hi def nroffDefinition term=italic cterm=italic gui=reverse
      hi def nroffDefSpecial term=italic,bold cterm=italic,bold
    			 \ gui=reverse,bold

    If you want to navigate preprocessor entries in your source file as easily as
    with section markers, you can activate the following option in your .vimrc
    file:

    	let b:preprocs_as_sections = 1

    As well, the syntax file adds an extra paragraph marker for the extended
    paragraph macro (.XP) in the ms package.

    Finally, there is a |groff.vim| syntax file that can be used for enabling
    groff syntax highlighting either on a file basis or globally by default.

    OCAML						*ocaml.vim* *ft-ocaml-syntax*

    The OCaml syntax file handles files having the following prefixes: .ml,
    .mli, .mll and .mly.  By setting the following variable

    	:let ocaml_revised = 1

    you can switch from standard OCaml-syntax to revised syntax as supported
    by the camlp4 preprocessor.  Setting the variable

    	:let ocaml_noend_error = 1

    prevents highlighting of "end" as error, which is useful when sources
    contain very long structures that Vim does not synchronize anymore.

    PAPP						*papp.vim* *ft-papp-syntax*

    The PApp syntax file handles .papp files and, to a lesser extent, .pxml
    and .pxsl files which are all a mixture of perl/xml/html/other using xml
    as the top-level file format.  By default everything inside phtml or pxml
    sections is treated as a string with embedded preprocessor commands.  If
    you set the variable:

    	:let papp_include_html=1

    in your startup file it will try to syntax-hilight html code inside phtml
    sections, but this is relatively slow and much too colourful to be able to
    edit sensibly. ;)

    The newest version of the papp.vim syntax file can usually be found at
    http://papp.plan9.de.

    PASCAL						*pascal.vim* *ft-pascal-syntax*

    Files matching "*.p" could be Progress or Pascal.  If the automatic detection
    doesn't work for you, or you don't edit Progress at all, use this in your
    startup vimrc:

       :let filetype_p = "pascal"

    The Pascal syntax file has been extended to take into account some extensions
    provided by Turbo Pascal, Free Pascal Compiler and GNU Pascal Compiler.
    Delphi keywords are also supported.  By default, Turbo Pascal 7.0 features are
    enabled.  If you prefer to stick with the standard Pascal keywords, add the
    following line to your startup file:

       :let pascal_traditional=1

    To switch on Delphi specific constructions (such as one-line comments,
    keywords, etc):

       :let pascal_delphi=1

    The option pascal_symbol_operator controls whether symbol operators such as +,
    *, .., etc. are displayed using the Operator color or not.  To colorize symbol
    operators, add the following line to your startup file:

       :let pascal_symbol_operator=1

    Some functions are highlighted by default.  To switch it off:

       :let pascal_no_functions=1

    Furthermore, there are specific variables for some compilers.  Besides
    pascal_delphi, there are pascal_gpc and pascal_fpc.  Default extensions try to
    match Turbo Pascal.

       :let pascal_gpc=1

    or

       :let pascal_fpc=1

    To ensure that strings are defined on a single line, you can define the
    pascal_one_line_string variable.

       :let pascal_one_line_string=1

    If you dislike <Tab> chars, you can set the pascal_no_tabs variable.  Tabs
    will be highlighted as Error.

       :let pascal_no_tabs=1

    PERL						*perl.vim* *ft-perl-syntax*

    There are a number of possible options to the perl syntax highlighting.

    Inline POD highlighting is now turned on by default.  If you don't wish
    to have the added complexity of highlighting POD embedded within Perl
    files, you may set the 'perl_include_pod' option to 0:

    	:let perl_include_pod = 0

    To reduce the complexity of parsing (and increase performance) you can switch
    off two elements in the parsing of variable names and contents.

    To handle package references in variable and function names not differently
    from the rest of the name (like 'PkgName::' in '$PkgName::VarName'):

    	:let perl_no_scope_in_variables = 1

    (In Vim 6.x it was the other way around: "perl_want_scope_in_variables"
    enabled it.)

    If you do not want complex things like '@{${"foo"}}' to be parsed:

    	:let perl_no_extended_vars = 1

    (In Vim 6.x it was the other way around: "perl_extended_vars" enabled it.)

    The coloring strings can be changed.  By default strings and qq friends will be
    highlighted like the first line.  If you set the variable
    perl_string_as_statement, it will be highlighted as in the second line.

       "hello world!"; qq|hello world|;
       ^^^^^^^^^^^^^^NN^^^^^^^^^^^^^^^N	  (unlet perl_string_as_statement)
       S^^^^^^^^^^^^SNNSSS^^^^^^^^^^^SN	  (let perl_string_as_statement)

    (^ = perlString, S = perlStatement, N = None at all)

    The syncing has 3 options.  The first two switch off some triggering of
    synchronization and should only be needed in case it fails to work properly.
    If while scrolling all of a sudden the whole screen changes color completely
    then you should try and switch off one of those.  Let me know if you can figure
    out the line that causes the mistake.

    One triggers on "^\s*sub\s*" and the other on "^[$@%]" more or less.

    	:let perl_no_sync_on_sub
    	:let perl_no_sync_on_global_var

    Below you can set the maximum distance VIM should look for starting points for
    its attempts in syntax highlighting.

    	:let perl_sync_dist = 100

    If you want to use folding with perl, set perl_fold:

    	:let perl_fold = 1

    If you want to fold blocks in if statements, etc. as well set the following:

    	:let perl_fold_blocks = 1

    Subroutines are folded by default if 'perl_fold' is set.  If you do not want
    this, you can set 'perl_nofold_subs':

    	:let perl_nofold_subs = 1

    Anonymous subroutines are not folded by default; you may enable their folding
    via 'perl_fold_anonymous_subs':

    	:let perl_fold_anonymous_subs = 1

    Packages are also folded by default if 'perl_fold' is set.  To disable this
    behavior, set 'perl_nofold_packages':

    	:let perl_nofold_packages = 1

    PHP3 and PHP4		*php.vim* *php3.vim* *ft-php-syntax* *ft-php3-syntax*

    [note: previously this was called "php3", but since it now also supports php4
    it has been renamed to "php"]

    There are the following options for the php syntax highlighting.

    If you like SQL syntax highlighting inside Strings:

      let php_sql_query = 1

    For highlighting the Baselib methods:

      let php_baselib = 1

    Enable HTML syntax highlighting inside strings:

      let php_htmlInStrings = 1

    Using the old colorstyle:

      let php_oldStyle = 1

    Enable highlighting ASP-style short tags:

      let php_asp_tags = 1

    Disable short tags:

      let php_noShortTags = 1

    For highlighting parent error ] or ):

      let php_parent_error_close = 1

    For skipping a php end tag, if there exists an open ( or [ without a closing
    one:

      let php_parent_error_open = 1

    Enable folding for classes and functions:

      let php_folding = 1

    Selecting syncing method:

      let php_sync_method = x

    x = -1 to sync by search (default),
    x > 0 to sync at least x lines backwards,
    x = 0 to sync from start.

    PLAINTEX				*plaintex.vim* *ft-plaintex-syntax*

    TeX is a typesetting language, and plaintex is the file type for the "plain"
    variant of TeX.  If you never want your *.tex files recognized as plain TeX,
    see |ft-tex-plugin|.

    This syntax file has the option

    	let g:plaintex_delimiters = 1

    if you want to highlight brackets "[]" and braces "{}".

    PPWIZARD					*ppwiz.vim* *ft-ppwiz-syntax*

    PPWizard is a preprocessor for HTML and OS/2 INF files

    This syntax file has the options:

    - ppwiz_highlight_defs : determines highlighting mode for PPWizard's
      definitions.  Possible values are

      ppwiz_highlight_defs = 1 : PPWizard #define statements retain the
        colors of their contents (e.g. PPWizard macros and variables)

      ppwiz_highlight_defs = 2 : preprocessor #define and #evaluate
        statements are shown in a single color with the exception of line
        continuation symbols

      The default setting for ppwiz_highlight_defs is 1.

    - ppwiz_with_html : If the value is 1 (the default), highlight literal
      HTML code; if 0, treat HTML code like ordinary text.

    PHTML						*phtml.vim* *ft-phtml-syntax*

    There are two options for the phtml syntax highlighting.

    If you like SQL syntax highlighting inside Strings, use this:

    	:let phtml_sql_query = 1

    For syncing, minlines defaults to 100.	If you prefer another value, you can
    set "phtml_minlines" to the value you desire.  Example:

    	:let phtml_minlines = 200

    POSTSCRIPT				*postscr.vim* *ft-postscr-syntax*

    There are several options when it comes to highlighting PostScript.

    First which version of the PostScript language to highlight.  There are
    currently three defined language versions, or levels.  Level 1 is the original
    and base version, and includes all extensions prior to the release of level 2.
    Level 2 is the most common version around, and includes its own set of
    extensions prior to the release of level 3.  Level 3 is currently the highest
    level supported.  You select which level of the PostScript language you want
    highlighted by defining the postscr_level variable as follows:

    	:let postscr_level=2

    If this variable is not defined it defaults to 2 (level 2) since this is
    the most prevalent version currently.

    Note, not all PS interpreters will support all language features for a
    particular language level.  In particular the %!PS-Adobe-3.0 at the start of
    PS files does NOT mean the PostScript present is level 3 PostScript!

    If you are working with Display PostScript, you can include highlighting of
    Display PS language features by defining the postscr_display variable as
    follows:

    	:let postscr_display=1

    If you are working with Ghostscript, you can include highlighting of
    Ghostscript specific language features by defining the variable
    postscr_ghostscript as follows:

    	:let postscr_ghostscript=1

    PostScript is a large language, with many predefined elements.	While it
    useful to have all these elements highlighted, on slower machines this can
    cause Vim to slow down.  In an attempt to be machine friendly font names and
    character encodings are not highlighted by default.  Unless you are working
    explicitly with either of these this should be ok.  If you want them to be
    highlighted you should set one or both of the following variables:

    	:let postscr_fonts=1
    	:let postscr_encodings=1

    There is a stylistic option to the highlighting of and, or, and not.  In
    PostScript the function of these operators depends on the types of their
    operands - if the operands are booleans then they are the logical operators,
    if they are integers then they are binary operators.  As binary and logical
    operators can be highlighted differently they have to be highlighted one way
    or the other.  By default they are treated as logical operators.  They can be
    highlighted as binary operators by defining the variable
    postscr_andornot_binary as follows:

    	:let postscr_andornot_binary=1

    			*ptcap.vim* *ft-printcap-syntax*
    PRINTCAP + TERMCAP	*ft-ptcap-syntax* *ft-termcap-syntax*

    This syntax file applies to the printcap and termcap databases.

    In order for Vim to recognize printcap/termcap files that do not match
    the patterns *printcap*, or *termcap*, you must put additional patterns
    appropriate to your system in your |myfiletypefile| file.  For these
    patterns, you must set the variable "b:ptcap_type" to either "print" or
    "term", and then the 'filetype' option to ptcap.

    For example, to make Vim identify all files in /etc/termcaps/ as termcap
    files, add the following:

       :au BufNewFile,BufRead /etc/termcaps/* let b:ptcap_type = "term" |
    				       \ set filetype=ptcap

    If you notice highlighting errors while scrolling backwards, which
    are fixed when redrawing with CTRL-L, try setting the "ptcap_minlines"
    internal variable to a larger number:

       :let ptcap_minlines = 50

    (The default is 20 lines.)

    PROGRESS				*progress.vim* *ft-progress-syntax*

    Files matching "*.w" could be Progress or cweb.  If the automatic detection
    doesn't work for you, or you don't edit cweb at all, use this in your
    startup vimrc:
       :let filetype_w = "progress"
    The same happens for "*.i", which could be assembly, and "*.p", which could be
    Pascal.  Use this if you don't use assembly and Pascal:
       :let filetype_i = "progress"
       :let filetype_p = "progress"

    PYTHON						*python.vim* *ft-python-syntax*

    There are six options to control Python syntax highlighting.

    For highlighted numbers:
    	:let python_no_number_highlight = 1

    For highlighted builtin functions:
    	:let python_no_builtin_highlight = 1

    For highlighted standard exceptions:
    	:let python_no_exception_highlight = 1

    For highlighted doctests and code inside:
    	:let python_no_doctest_highlight = 1
    or
    	:let python_no_doctest_code_highlight = 1
    (first option implies second one).

    For highlighted trailing whitespace and mix of spaces and tabs:
    	:let python_space_error_highlight = 1

    If you want all possible Python highlighting (the same as setting the
    preceding last option and unsetting all other ones):
    	:let python_highlight_all = 1

    Note: only existence of these options matter, not their value. You can replace
          1 above with anything.

    QUAKE						*quake.vim* *ft-quake-syntax*

    The Quake syntax definition should work for most FPS (First Person Shooter)
    based on one of the Quake engines.  However, the command names vary a bit
    between the three games (Quake, Quake 2, and Quake 3 Arena) so the syntax
    definition checks for the existence of three global variables to allow users
    to specify what commands are legal in their files.  The three variables can
    be set for the following effects:

    set to highlight commands only available in Quake:
    	:let quake_is_quake1 = 1

    set to highlight commands only available in Quake 2:
    	:let quake_is_quake2 = 1

    set to highlight commands only available in Quake 3 Arena:
    	:let quake_is_quake3 = 1

    Any combination of these three variables is legal, but might highlight more
    commands than are actually available to you by the game.

    R							*r.vim* *ft-r-syntax*

    The parsing of R code for syntax highlight starts 40 lines backwards, but you
    can set a different value in your |vimrc|. Example:
    	let r_syntax_minlines = 60

    You can also turn off syntax highlighting of ROxygen:
    	let r_syntax_hl_roxygen = 0

    enable folding of code delimited by parentheses, square brackets and curly
    braces:
    	let r_syntax_folding = 1

    and highlight as functions all keywords followed by an opening parenthesis:
    	let r_syntax_fun_pattern = 1

    R MARKDOWN					*rmd.vim* *ft-rmd-syntax*

    To disable syntax highlight of YAML header, add to your |vimrc|:
    	let rmd_syn_hl_yaml = 0

    To disable syntax highlighting of citation keys:
    	let rmd_syn_hl_citations = 0

    To highlight R code in knitr chunk headers:
    	let rmd_syn_hl_chunk = 1

    By default, chunks of R code will be highlighted following the rules of R
    language. If you want proper syntax highlighting of chunks of other languages,
    you should add them to either `markdown_fenced_languages` or
    `rmd_fenced_languages`. For example to properly highlight both R and Python,
    you may add this to your |vimrc|:
    	let rmd_fenced_languages = ['r', 'python']

    R RESTRUCTURED TEXT				*rrst.vim* *ft-rrst-syntax*

    To highlight R code in knitr chunk headers, add to your |vimrc|:
    	let rrst_syn_hl_chunk = 1

    READLINE				*readline.vim* *ft-readline-syntax*

    The readline library is primarily used by the BASH shell, which adds quite a
    few commands and options to the ones already available.  To highlight these
    items as well you can add the following to your |vimrc| or just type it in the
    command line before loading a file with the readline syntax:
    	let readline_has_bash = 1

    This will add highlighting for the commands that BASH (version 2.05a and
    later, and part earlier) adds.

    REGO						*rego.vim* *ft-rego-syntax*

    Rego is a query language developed by Styra.  It is mostly used as a policy
    language for kubernetes, but can be applied to almost anything.  Files with
    the following extensions are recognized as rego files: .rego.

    RESTRUCTURED TEXT			*rst.vim* *ft-rst-syntax*

    Syntax highlighting is enabled for code blocks within the document for a
    select number of file types.  See $VIMRUNTIME/syntax/rst.vim for the default
    syntax list.

    To set a user-defined list of code block syntax highlighting:
    	let rst_syntax_code_list = ['vim', 'lisp', ...]

    To assign multiple code block types to a single syntax, define
    `rst_syntax_code_list` as a mapping:
    	let rst_syntax_code_list = {
    		\ 'cpp': ['cpp', 'c++'],
    		\ 'bash': ['bash', 'sh'],
    		...
    	\ }

    To use color highlighting for emphasis text:
    	let rst_use_emphasis_colors = 1

    To enable folding of sections:
    	let rst_fold_enabled = 1

    Note that folding can cause performance issues on some platforms.

    REXX						*rexx.vim* *ft-rexx-syntax*

    If you notice highlighting errors while scrolling backwards, which are fixed
    when redrawing with CTRL-L, try setting the "rexx_minlines" internal variable
    to a larger number:
    	:let rexx_minlines = 50
    This will make the syntax synchronization start 50 lines before the first
    displayed line.  The default value is 10.  The disadvantage of using a larger
    number is that redrawing can become slow.

    Vim tries to guess what type a ".r" file is.  If it can't be detected (from
    comment lines), the default is "r".  To make the default rexx add this line to
    your .vimrc:  *g:filetype_r*

    	:let g:filetype_r = "r"

    RUBY						*ruby.vim* *ft-ruby-syntax*

        Ruby: Operator highlighting		|ruby_operators|
        Ruby: Whitespace errors		|ruby_space_errors|
        Ruby: Folding			|ruby_fold| |ruby_foldable_groups|
        Ruby: Reducing expensive operations	|ruby_no_expensive| |ruby_minlines|
        Ruby: Spellchecking strings		|ruby_spellcheck_strings|

    						*ruby_operators*
     Ruby: Operator highlighting

    Operators can be highlighted by defining "ruby_operators":

    	:let ruby_operators = 1

    						*ruby_space_errors*
     Ruby: Whitespace errors

    Whitespace errors can be highlighted by defining "ruby_space_errors":

    	:let ruby_space_errors = 1

    This will highlight trailing whitespace and tabs preceded by a space character
    as errors.  This can be refined by defining "ruby_no_trail_space_error" and
    "ruby_no_tab_space_error" which will ignore trailing whitespace and tabs after
    spaces respectively.

    					*ruby_fold* *ruby_foldable_groups*
     Ruby: Folding

    Folding can be enabled by defining "ruby_fold":

    	:let ruby_fold = 1

    This will set the value of 'foldmethod' to "syntax" locally to the current
    buffer or window, which will enable syntax-based folding when editing Ruby
    filetypes.

    Default folding is rather detailed, i.e., small syntax units like "if", "do",
    "%w[]" may create corresponding fold levels.

    You can set "ruby_foldable_groups" to restrict which groups are foldable:

            :let ruby_foldable_groups = 'if case %'

    The value is a space-separated list of keywords:

        keyword       meaning
        --------  -------------------------------------
        ALL        Most block syntax (default)
        NONE       Nothing
        if         "if" or "unless" block
        def        "def" block
        class      "class" block
        module     "module" block
        do         "do" block
        begin      "begin" block
        case       "case" block
        for        "for", "while", "until" loops
        {          Curly bracket block or hash literal
        [          Array literal
        %          Literal with "%" notation, e.g.: %w(STRING), %!STRING!
        /          Regexp
        string     String and shell command output (surrounded by ', ", `)
        :          Symbol
        #          Multiline comment
        <<         Here documents
        __END__    Source code after "__END__" directive

    						*ruby_no_expensive*
     Ruby: Reducing expensive operations

    By default, the "end" keyword is colorized according to the opening statement
    of the block it closes.  While useful, this feature can be expensive; if you
    experience slow redrawing (or you are on a terminal with poor color support)
    you may want to turn it off by defining the "ruby_no_expensive" variable:

    	:let ruby_no_expensive = 1

    In this case the same color will be used for all control keywords.

    						*ruby_minlines*

    If you do want this feature enabled, but notice highlighting errors while
    scrolling backwards, which are fixed when redrawing with CTRL-L, try setting
    the "ruby_minlines" variable to a value larger than 50:

    	:let ruby_minlines = 100

    Ideally, this value should be a number of lines large enough to embrace your
    largest class or module.

    						*ruby_spellcheck_strings*
     Ruby: Spellchecking strings

    Ruby syntax will perform spellchecking of strings if you define
    "ruby_spellcheck_strings":

    	:let ruby_spellcheck_strings = 1

    SCHEME						*scheme.vim* *ft-scheme-syntax*

    By default only R7RS keywords are highlighted and properly indented.

    scheme.vim also supports extensions of the CHICKEN Scheme->C compiler.
    Define b:is_chicken or g:is_chicken, if you need them.

    SDL						*sdl.vim* *ft-sdl-syntax*

    The SDL highlighting probably misses a few keywords, but SDL has so many
    of them it's almost impossibly to cope.

    The new standard, SDL-2000, specifies that all identifiers are
    case-sensitive (which was not so before), and that all keywords can be
    used either completely lowercase or completely uppercase.  To have the
    highlighting reflect this, you can set the following variable:
    	:let sdl_2000=1

    This also sets many new keywords.  If you want to disable the old
    keywords, which is probably a good idea, use:
    	:let SDL_no_96=1

    The indentation is probably also incomplete, but right now I am very
    satisfied with it for my own projects.

    SED						*sed.vim* *ft-sed-syntax*

    To make tabs stand out from regular blanks (accomplished by using Todo
    highlighting on the tabs), define "highlight_sedtabs" by putting

    	:let highlight_sedtabs = 1

    in the vimrc file.  (This special highlighting only applies for tabs
    inside search patterns, replacement texts, addresses or text included
    by an Append/Change/Insert command.)  If you enable this option, it is
    also a good idea to set the tab width to one character; by doing that,
    you can easily count the number of tabs in a string.

    Bugs:

      The transform command (y) is treated exactly like the substitute
      command.  This means that, as far as this syntax file is concerned,
      transform accepts the same flags as substitute, which is wrong.
      (Transform accepts no flags.)  I tolerate this bug because the
      involved commands need very complex treatment (95 patterns, one for
      each plausible pattern delimiter).

    SGML						*sgml.vim* *ft-sgml-syntax*

    The coloring scheme for tags in the SGML file works as follows.

    The <> of opening tags are colored differently than the </> of a closing tag.
    This is on purpose! For opening tags the 'Function' color is used, while for
    closing tags the 'Type' color is used (See syntax.vim to check how those are
    defined for you)

    Known tag names are colored the same way as statements in C.  Unknown tag
    names are not colored which makes it easy to spot errors.

    Note that the same is true for argument (or attribute) names.  Known attribute
    names are colored differently than unknown ones.

    Some SGML tags are used to change the rendering of text.  The following tags
    are recognized by the sgml.vim syntax coloring file and change the way normal
    text is shown: <varname> <emphasis> <command> <function> <literal>
    <replaceable> <ulink> and <link>.

    If you want to change how such text is rendered, you must redefine the
    following syntax groups:

        - sgmlBold
        - sgmlBoldItalic
        - sgmlUnderline
        - sgmlItalic
        - sgmlLink for links

    To make this redefinition work you must redefine them all and define the
    following variable in your vimrc (this is due to the order in which the files
    are read during initialization)
       let sgml_my_rendering=1

    You can also disable this rendering by adding the following line to your
    vimrc file:
       let sgml_no_rendering=1

    (Adapted from the html.vim help text by Claudio Fleiner <claudio@fleiner.com>)

    		*ft-posix-synax* *ft-dash-syntax*
    SH		*sh.vim*  *ft-sh-syntax*  *ft-bash-syntax*  *ft-ksh-syntax*

    This covers syntax highlighting for the older Unix (Bourne) sh, and newer
    shells such as bash, dash, posix, and the Korn shells.

    Vim attempts to determine which shell type is in use by specifying that
    various filenames are of specific types, e.g.:

        ksh : .kshrc* *.ksh
        bash: .bashrc* bashrc bash.bashrc .bash_profile* *.bash

    See $VIMRUNTIME/filetype.vim for the full list of patterns.  If none of these
    cases pertain, then the first line of the file is examined (ex. looking for
    /bin/sh  /bin/ksh  /bin/bash).  If the first line specifies a shelltype, then
    that shelltype is used.  However some files (ex. .profile) are known to be
    shell files but the type is not apparent.  Furthermore, on many systems sh is
    symbolically linked to "bash" (Linux, Windows+cygwin) or "ksh" (Posix).

    One may specify a global default by instantiating one of the following
    variables in your <.vimrc>:

       ksh:
    	let g:is_kornshell = 1
    <   posix:  (using this is nearly the same as setting g:is_kornshell to 1)
    	let g:is_posix     = 1
    <   bash:
    	let g:is_bash	   = 1
    <   sh: (default) Bourne shell
    	let g:is_sh	   = 1

       (dash users should use posix)

    If there's no "#! ..." line, and the user hasn't availed himself/herself of a
    default sh.vim syntax setting as just shown, then syntax/sh.vim will assume
    the Bourne shell syntax.  No need to quote RFCs or market penetration
    statistics in error reports, please -- just select the default version of the
    sh your system uses and install the associated "let..." in your <.vimrc>.

    The syntax/sh.vim file provides several levels of syntax-based folding:

    	let g:sh_fold_enabled= 0     (default, no syntax folding)
    	let g:sh_fold_enabled= 1     (enable function folding)
    	let g:sh_fold_enabled= 2     (enable heredoc folding)
    	let g:sh_fold_enabled= 4     (enable if/do/for folding)

    then various syntax items (ie. HereDocuments and function bodies) become
    syntax-foldable (see |:syn-fold|).  You also may add these together
    to get multiple types of folding:

    	let g:sh_fold_enabled= 3     (enables function and heredoc folding)

    If you notice highlighting errors while scrolling backwards which are fixed
    when one redraws with CTRL-L, try setting the "sh_minlines" internal variable
    to a larger number.  Example:

    	let sh_minlines = 500

    This will make syntax synchronization start 500 lines before the first
    displayed line.  The default value is 200.  The disadvantage of using a larger
    number is that redrawing can become slow.

    If you don't have much to synchronize on, displaying can be very slow.	To
    reduce this, the "sh_maxlines" internal variable can be set.  Example:

    	let sh_maxlines = 100

    The default is to use the twice sh_minlines.  Set it to a smaller number to
    speed up displaying.  The disadvantage is that highlight errors may appear.

    syntax/sh.vim tries to flag certain problems as errors; usually things like
    extra ']'s, 'done's, 'fi's, etc.  If you find the error handling problematic
    for your purposes, you may suppress such error highlighting by putting
    the following line in your .vimrc:

    	let g:sh_no_error= 1

    						*sh-embed*  *sh-awk*
     Sh: EMBEDDING LANGUAGES

    You may wish to embed languages into sh.  I'll give an example courtesy of
    Lorance Stinson on how to do this with awk as an example. Put the following
    file into $HOME/.vim/after/syntax/sh/awkembed.vim:

        " AWK Embedding:
        " ==============
        " Shamelessly ripped from aspperl.vim by Aaron Hope.
        if exists("b:current_syntax")
          unlet b:current_syntax
        endif
        syn include @AWKScript syntax/awk.vim
        syn region AWKScriptCode matchgroup=AWKCommand start=+[=\\]\@<!'+ skip=+\\'+ end=+'+ contains=@AWKScript contained
        syn region AWKScriptEmbedded matchgroup=AWKCommand start=+\<awk\>+ skip=+\\$+ end=+[=\\]\@<!'+me=e-1 contains=@shIdList,@shExprList2 nextgroup=AWKScriptCode
        syn cluster shCommandSubList add=AWKScriptEmbedded
        hi def link AWKCommand Type

    This code will then let the awk code in the single quotes:
    	awk '...awk code here...'
    be highlighted using the awk highlighting syntax.  Clearly this may be
    extended to other languages.

    SPEEDUP						*spup.vim* *ft-spup-syntax*
    (AspenTech plant simulator)

    The Speedup syntax file has some options:

    - strict_subsections : If this variable is defined, only keywords for
      sections and subsections will be highlighted as statements but not
      other keywords (like WITHIN in the OPERATION section).

    - highlight_types : Definition of this variable causes stream types
      like temperature or pressure to be highlighted as Type, not as a
      plain Identifier.  Included are the types that are usually found in
      the DECLARE section; if you defined own types, you have to include
      them in the syntax file.

    - oneline_comments : this value ranges from 1 to 3 and determines the
      highlighting of # style comments.

      oneline_comments = 1 : allow normal Speedup code after an even
      number of #s.

      oneline_comments = 2 : show code starting with the second # as
      error.  This is the default setting.

      oneline_comments = 3 : show the whole line as error if it contains
      more than one #.

    Since especially OPERATION sections tend to become very large due to
    PRESETting variables, syncing may be critical.  If your computer is
    fast enough, you can increase minlines and/or maxlines near the end of
    the syntax file.

    SQL						*sql.vim* *ft-sql-syntax*
    				*sqlinformix.vim* *ft-sqlinformix-syntax*
    				*sqlanywhere.vim* *ft-sqlanywhere-syntax*

    While there is an ANSI standard for SQL, most database engines add their own
    custom extensions.  Vim currently supports the Oracle and Informix dialects of
    SQL.  Vim assumes "*.sql" files are Oracle SQL by default.

    Vim currently has SQL support for a variety of different vendors via syntax
    scripts.  You can change Vim's default from Oracle to any of the current SQL
    supported types.  You can also easily alter the SQL dialect being used on a
    buffer by buffer basis.

    For more detailed instructions see |ft_sql|.

    TCSH						*tcsh.vim* *ft-tcsh-syntax*

    This covers the shell named "tcsh".  It is a superset of csh.  See |csh.vim|
    for how the filetype is detected.

    Tcsh does not allow \" in strings unless the "backslash_quote" shell variable
    is set.  If you want VIM to assume that no backslash quote constructs exist add
    this line to your .vimrc:

    	:let tcsh_backslash_quote = 0

    If you notice highlighting errors while scrolling backwards, which are fixed
    when redrawing with CTRL-L, try setting the "tcsh_minlines" internal variable
    to a larger number:

    	:let tcsh_minlines = 1000

    This will make the syntax synchronization start 1000 lines before the first
    displayed line.  If you set "tcsh_minlines" to "fromstart", then
    synchronization is done from the start of the file. The default value for
    tcsh_minlines is 100.  The disadvantage of using a larger number is that
    redrawing can become slow.

    TEX				*tex.vim* *ft-tex-syntax* *latex-syntax*

    			Tex Contents
    	Tex: Want Syntax Folding?			|tex-folding|
    	Tex: No Spell Checking Wanted			|g:tex_nospell|
    	Tex: Don't Want Spell Checking In Comments?	|tex-nospell|
    	Tex: Want Spell Checking in Verbatim Zones?	|tex-verb|
    	Tex: Run-on Comments or MathZones		|tex-runon|
    	Tex: Slow Syntax Highlighting?			|tex-slow|
    	Tex: Want To Highlight More Commands?		|tex-morecommands|
    	Tex: Excessive Error Highlighting?		|tex-error|
    	Tex: Need a new Math Group?			|tex-math|
    	Tex: Starting a New Style?			|tex-style|
    	Tex: Taking Advantage of Conceal Mode		|tex-conceal|
    	Tex: Selective Conceal Mode			|g:tex_conceal|
    	Tex: Controlling iskeyword			|g:tex_isk|
    	Tex: Fine Subscript and Superscript Control	|tex-supersub|

    				*tex-folding* *g:tex_fold_enabled*
     Tex: Want Syntax Folding?

    As of version 28 of <syntax/tex.vim>, syntax-based folding of parts, chapters,
    sections, subsections, etc are supported.  Put
    	let g:tex_fold_enabled=1
    in your <.vimrc>, and :set fdm=syntax.  I suggest doing the latter via a
    modeline at the end of your LaTeX file:
    	% vim: fdm=syntax
    If your system becomes too slow, then you might wish to look into
    	https://vimhelp.org/vim_faq.txt.html#faq-29.7

    						*g:tex_nospell*
     Tex: No Spell Checking Wanted

    If you don't want spell checking anywhere in your LaTeX document, put
    	let g:tex_nospell=1
    into your .vimrc.  If you merely wish to suppress spell checking inside
    comments only, see |g:tex_comment_nospell|.

    				*tex-nospell* *g:tex_comment_nospell*
     Tex: Don't Want Spell Checking In Comments?

    Some folks like to include things like source code in comments and so would
    prefer that spell checking be disabled in comments in LaTeX files.  To do
    this, put the following in your <.vimrc>:
          let g:tex_comment_nospell= 1
    If you want to suppress spell checking everywhere inside your LaTeX document,
    see |g:tex_nospell|.

    				*tex-verb* *g:tex_verbspell*
     Tex: Want Spell Checking in Verbatim Zones?

    Often verbatim regions are used for things like source code; seldom does
    one want source code spell-checked.  However, for those of you who do
    want your verbatim zones spell-checked, put the following in your <.vimrc>:
    	let g:tex_verbspell= 1

    					*tex-runon* *tex-stopzone*
     Tex: Run-on Comments or MathZones

    The <syntax/tex.vim> highlighting supports TeX, LaTeX, and some AmsTeX.  The
    highlighting supports three primary zones/regions: normal, texZone, and
    texMathZone.  Although considerable effort has been made to have these zones
    terminate properly, zones delineated by $..$ and $$..$$ cannot be synchronized
    as there's no difference between start and end patterns.  Consequently, a
    special "TeX comment" has been provided
    	%stopzone
    which will forcibly terminate the highlighting of either a texZone or a
    texMathZone.

    					*tex-slow* *tex-sync*
     Tex: Slow Syntax Highlighting?

    If you have a slow computer, you may wish to reduce the values for
    	:syn sync maxlines=200
    	:syn sync minlines=50
    (especially the latter).  If your computer is fast, you may wish to
    increase them.	This primarily affects synchronizing (i.e. just what group,
    if any, is the text at the top of the screen supposed to be in?).

    Another cause of slow highlighting is due to syntax-driven folding; see
    |tex-folding| for a way around this.

    					*g:tex_fast*

    Finally, if syntax highlighting is still too slow, you may set

    	:let g:tex_fast= ""

    in your .vimrc.  Used this way, the g:tex_fast variable causes the syntax
    highlighting script to avoid defining any regions and associated
    synchronization.  The result will be much faster syntax highlighting; the
    price: you will no longer have as much highlighting or any syntax-based
    folding, and you will be missing syntax-based error checking.

    You may decide that some syntax is acceptable; you may use the following table
    selectively to enable just some syntax highlighting:

        b : allow bold and italic syntax
        c : allow texComment syntax
        m : allow texMatcher syntax (ie. {...} and [...])
        M : allow texMath syntax
        p : allow parts, chapter, section, etc syntax
        r : allow texRefZone syntax (nocite, bibliography, label, pageref, eqref)
        s : allow superscript/subscript regions
        S : allow texStyle syntax
        v : allow verbatim syntax
        V : allow texNewEnv and texNewCmd syntax

    As an example, let g:tex_fast= "M" will allow math-associated highlighting
    but suppress all the other region-based syntax highlighting.
    (also see: |g:tex_conceal| and |tex-supersub|)

    					*tex-morecommands* *tex-package*
     Tex: Want To Highlight More Commands?

    LaTeX is a programmable language, and so there are thousands of packages full
    of specialized LaTeX commands, syntax, and fonts.  If you're using such a
    package you'll often wish that the distributed syntax/tex.vim would support
    it.  However, clearly this is impractical.  So please consider using the
    techniques in |mysyntaxfile-add| to extend or modify the highlighting provided
    by syntax/tex.vim.  Please consider uploading any extensions that you write,
    which typically would go in $HOME/after/syntax/tex/[pkgname].vim, to
    http://vim.sf.net/.

    I've included some support for various popular packages on my website:

    	http://www.drchip.org/astronaut/vim/index.html#LATEXPKGS

    The syntax files there go into your .../after/syntax/tex/ directory.

    					*tex-error* *g:tex_no_error*
     Tex: Excessive Error Highlighting?

    The <tex.vim> supports lexical error checking of various sorts.  Thus,
    although the error checking is ofttimes very useful, it can indicate
    errors where none actually are.  If this proves to be a problem for you,
    you may put in your <.vimrc> the following statement:
    	let g:tex_no_error=1
    and all error checking by <syntax/tex.vim> will be suppressed.

    								*tex-math*
     Tex: Need a new Math Group?

    If you want to include a new math group in your LaTeX, the following
    code shows you an example as to how you might do so:
    	call TexNewMathZone(sfx,mathzone,starform)
    You'll want to provide the new math group with a unique suffix
    (currently, A-L and V-Z are taken by <syntax/tex.vim> itself).
    As an example, consider how eqnarray is set up by <syntax/tex.vim>:
    	call TexNewMathZone("D","eqnarray",1)
    You'll need to change "mathzone" to the name of your new math group,
    and then to the call to it in .vim/after/syntax/tex.vim.
    The "starform" variable, if true, implies that your new math group
    has a starred form (ie. eqnarray*).

    					*tex-style* *b:tex_stylish*
     Tex: Starting a New Style?

    One may use "\makeatletter" in *.tex files, thereby making the use of "@" in
    commands available.  However, since the *.tex file doesn't have one of the
    following suffices: sty cls clo dtx ltx, the syntax highlighting will flag
    such use of @ as an error.  To solve this:

    	:let b:tex_stylish = 1
    	:set ft=tex

    Putting "let g:tex_stylish=1" into your <.vimrc> will make <syntax/tex.vim>
    always accept such use of @.

    					*tex-cchar* *tex-cole* *tex-conceal*
     Tex: Taking Advantage of Conceal Mode

    If you have |'conceallevel'| set to 2 and if your encoding is utf-8, then a
    number of character sequences can be translated into appropriate utf-8 glyphs,
    including various accented characters, Greek characters in MathZones, and
    superscripts and subscripts in MathZones.  Not all characters can be made into
    superscripts or subscripts; the constraint is due to what utf-8 supports.
    In fact, only a few characters are supported as subscripts.

    One way to use this is to have vertically split windows (see |CTRL-W_v|); one
    with |'conceallevel'| at 0 and the other at 2; and both using |'scrollbind'|.

    					*g:tex_conceal*
     Tex: Selective Conceal Mode

    You may selectively use conceal mode by setting g:tex_conceal in your
    <.vimrc>.  By default, g:tex_conceal is set to "admgs" to enable concealment
    for the following sets of characters:

    	a = accents/ligatures
    	b = bold and italic
    	d = delimiters
    	m = math symbols
    	g = Greek
    	s = superscripts/subscripts

    By leaving one or more of these out, the associated conceal-character
    substitution will not be made.

    						*g:tex_isk* *g:tex_stylish*
     Tex: Controlling iskeyword

    Normally, LaTeX keywords support 0-9, a-z, A-z, and 192-255 only. Latex
    keywords don't support the underscore - except when in *.sty files.  The
    syntax highlighting script handles this with the following logic:

    	* If g:tex_stylish exists and is 1
    		then the file will be treated as a "sty" file, so the "_"
    		will be allowed as part of keywords
    		(regardless of g:tex_isk)
    	* Else if the file's suffix is sty, cls, clo, dtx, or ltx,
    		then the file will be treated as a "sty" file, so the "_"
    		will be allowed as part of keywords
    		(regardless of g:tex_isk)

    	* If g:tex_isk exists, then it will be used for the local 'iskeyword'
    	* Else the local 'iskeyword' will be set to 48-57,a-z,A-Z,192-255

    			*tex-supersub* *g:tex_superscripts* *g:tex_subscripts*
     Tex: Fine Subscript and Superscript Control

    	See |tex-conceal| for how to enable concealed character replacement.

    	See |g:tex_conceal| for selectively concealing accents, bold/italic,
    	math, Greek, and superscripts/subscripts.

    	One may exert fine control over which superscripts and subscripts one
    	wants syntax-based concealment for (see |:syn-cchar|).  Since not all
    	fonts support all characters, one may override the
    	concealed-replacement lists; by default these lists are given by:

    	    let g:tex_superscripts= "[0-9a-zA-W.,:;+-<>/()=]"
    	    let g:tex_subscripts= "[0-9aehijklmnoprstuvx,+-/().]"

    	For example, I use Luxi Mono Bold; it doesn't support subscript
    	characters for "hklmnpst", so I put
    		let g:tex_subscripts= "[0-9aeijoruvx,+-/().]"
    	in ~/.vim/ftplugin/tex/tex.vim in order to avoid having inscrutable
    	utf-8 glyphs appear.

    TF						*tf.vim* *ft-tf-syntax*

    There is one option for the tf syntax highlighting.

    For syncing, minlines defaults to 100.	If you prefer another value, you can
    set "tf_minlines" to the value you desire.  Example:

    	:let tf_minlines = your choice

    VIM			*vim.vim*		*ft-vim-syntax*
    			*g:vimsyn_minlines*	*g:vimsyn_maxlines*
    There is a trade-off between more accurate syntax highlighting versus screen
    updating speed.  To improve accuracy, you may wish to increase the
    g:vimsyn_minlines variable.  The g:vimsyn_maxlines variable may be used to
    improve screen updating rates (see |:syn-sync| for more on this).

    	g:vimsyn_minlines : used to set synchronization minlines
    	g:vimsyn_maxlines : used to set synchronization maxlines

    	(g:vim_minlines and g:vim_maxlines are deprecated variants of
    	these two options)

    						*g:vimsyn_embed*
    The g:vimsyn_embed option allows users to select what, if any, types of
    embedded script highlighting they wish to have.

       g:vimsyn_embed == 0   : don't support any embedded scripts
       g:vimsyn_embed =~ 'l' : support embedded lua
       g:vimsyn_embed =~ 'm' : support embedded mzscheme
       g:vimsyn_embed =~ 'p' : support embedded perl
       g:vimsyn_embed =~ 'P' : support embedded python
       g:vimsyn_embed =~ 'r' : support embedded ruby
       g:vimsyn_embed =~ 't' : support embedded tcl

    By default, g:vimsyn_embed is a string supporting interpreters that your vim
    itself supports.  Concatenate multiple characters to support multiple types
    of embedded interpreters; ie. g:vimsyn_embed= "mp" supports embedded mzscheme
    and embedded perl.
    						*g:vimsyn_folding*

    Some folding is now supported with syntax/vim.vim:

       g:vimsyn_folding == 0 or doesn't exist: no syntax-based folding
       g:vimsyn_folding =~ 'a' : augroups
       g:vimsyn_folding =~ 'f' : fold functions
       g:vimsyn_folding =~ 'l' : fold lua      script
       g:vimsyn_folding =~ 'm' : fold mzscheme script
       g:vimsyn_folding =~ 'p' : fold perl     script
       g:vimsyn_folding =~ 'P' : fold python   script
       g:vimsyn_folding =~ 'r' : fold ruby     script
       g:vimsyn_folding =~ 't' : fold tcl      script

    							*g:vimsyn_noerror*
    Not all error highlighting that syntax/vim.vim does may be correct; Vim script
    is a difficult language to highlight correctly.  A way to suppress error
    highlighting is to put the following line in your |vimrc|:

    	let g:vimsyn_noerror = 1

    XF86CONFIG				*xf86conf.vim* *ft-xf86conf-syntax*

    The syntax of XF86Config file differs in XFree86 v3.x and v4.x.  Both
    variants are supported.  Automatic detection is used, but is far from perfect.
    You may need to specify the version manually.  Set the variable
    xf86conf_xfree86_version to 3 or 4 according to your XFree86 version in
    your .vimrc.  Example:
    	:let xf86conf_xfree86_version=3
    When using a mix of versions, set the b:xf86conf_xfree86_version variable.

    Note that spaces and underscores in option names are not supported.  Use
    "SyncOnGreen" instead of "__s yn con gr_e_e_n" if you want the option name
    highlighted.

    XML						*xml.vim* *ft-xml-syntax*

    Xml namespaces are highlighted by default.  This can be inhibited by
    setting a global variable:

    	:let g:xml_namespace_transparent=1

    							*xml-folding*
    The xml syntax file provides syntax |folding| (see |:syn-fold|) between
    start and end tags.  This can be turned on by

    	:let g:xml_syntax_folding = 1
    	:set foldmethod=syntax

    Note: syntax folding might slow down syntax highlighting significantly,
    especially for large files.

    X Pixmaps (XPM)					*xpm.vim* *ft-xpm-syntax*

    xpm.vim creates its syntax items dynamically based upon the contents of the
    XPM file.  Thus if you make changes e.g. in the color specification strings,
    you have to source it again e.g. with ":set syn=xpm".

    To copy a pixel with one of the colors, yank a "pixel" with "yl" and insert it
    somewhere else with "P".

    Do you want to draw with the mouse?  Try the following:
       :function! GetPixel()
       :   let c = getline(".")[col(".") - 1]
       :   echo c
       :   exe "noremap <LeftMouse> <LeftMouse>r".c
       :   exe "noremap <LeftDrag>	<LeftMouse>r".c
       :endfunction
       :noremap <RightMouse> <LeftMouse>:call GetPixel()<CR>
       :set guicursor=n:hor20	   " to see the color beneath the cursor
    This turns the right button into a pipette and the left button into a pen.
    It will work with XPM files that have one character per pixel only and you
    must not click outside of the pixel strings, but feel free to improve it.

    It will look much better with a font in a quadratic cell size, e.g. for X:
    	:set guifont=-*-clean-medium-r-*-*-8-*-*-*-*-80-*

    YAML						*yaml.vim* *ft-yaml-syntax*

    					*g:yaml_schema* *b:yaml_schema*
    A YAML schema is a combination of a set of tags and a mechanism for resolving
    non-specific tags. For user this means that YAML parser may, depending on
    plain scalar contents, treat plain scalar (which can actually be only string
    and nothing else) as a value of the other type: null, boolean, floating-point,
    integer. `g:yaml_schema` option determines according to which schema values
    will be highlighted specially. Supported schemas are

    Schema		Description
    failsafe	No additional highlighting.
    json		Supports JSON-style numbers, booleans and null.
    core		Supports more number, boolean and null styles.
    pyyaml		In addition to core schema supports highlighting timestamps,
    		but there are some differences in what is recognized as
    		numbers and many additional boolean values not present in core
    		schema.

    Default schema is `core`.

    Note that schemas are not actually limited to plain scalars, but this is the
    only difference between schemas defined in YAML specification and the only
    difference defined in the syntax file.

    ZSH						    *zsh.vim* *ft-zsh-syntax*

    The syntax script for zsh allows for syntax-based folding:

    	:let g:zsh_fold_enable = 1

    6. Defining a syntax					*:syn-define* *E410*

    Vim understands three types of syntax items:

    1. Keyword
       It can only contain keyword characters, according to the 'iskeyword'
       option.  It cannot contain other syntax items.  It will only match with a
       complete word (there are no keyword characters before or after the match).
       The keyword "if" would match in "if(a=b)", but not in "ifdef x", because
       "(" is not a keyword character and "d" is.

    2. Match
       This is a match with a single regexp pattern.

    3. Region
       This starts at a match of the "start" regexp pattern and ends with a match
       with the "end" regexp pattern.  Any other text can appear in between.  A
       "skip" regexp pattern can be used to avoid matching the "end" pattern.

    Several syntax ITEMs can be put into one syntax GROUP.	For a syntax group
    you can give highlighting attributes.  For example, you could have an item
    to define a "/* .. */" comment and another one that defines a "// .." comment,
    and put them both in the "Comment" group.  You can then specify that a
    "Comment" will be in bold font and have a blue color.  You are free to make
    one highlight group for one syntax item, or put all items into one group.
    This depends on how you want to specify your highlighting attributes.  Putting
    each item in its own group results in having to specify the highlighting
    for a lot of groups.

    Note that a syntax group and a highlight group are similar.  For a highlight
    group you will have given highlight attributes.  These attributes will be used
    for the syntax group with the same name.

    In case more than one item matches at the same position, the one that was
    defined LAST wins.  Thus you can override previously defined syntax items by
    using an item that matches the same text.  But a keyword always goes before a
    match or region.  And a keyword with matching case always goes before a
    keyword with ignoring case.

    PRIORITY						*:syn-priority*

    When several syntax items may match, these rules are used:

    1. When multiple Match or Region items start in the same position, the item
       defined last has priority.
    2. A Keyword has priority over Match and Region items.
    3. An item that starts in an earlier position has priority over items that
       start in later positions.

    DEFINING CASE						*:syn-case* *E390*

    :sy[ntax] case [match | ignore]
    	This defines if the following ":syntax" commands will work with
    	matching case, when using "match", or with ignoring case, when using
    	"ignore".  Note that any items before this are not affected, and all
    	items until the next ":syntax case" command are affected.

    :sy[ntax] case
    	Show either "syntax case match" or "syntax case ignore" (translated).

    SPELL CHECKING						*:syn-spell*

    :sy[ntax] spell [toplevel | notoplevel | default]
    	This defines where spell checking is to be done for text that is not
    	in a syntax item:

    	toplevel:	Text is spell checked.
    	notoplevel:	Text is not spell checked.
    	default:	When there is a @Spell cluster no spell checking.

    	For text in syntax items use the @Spell and @NoSpell clusters
    	|spell-syntax|.  When there is no @Spell and no @NoSpell cluster then
    	spell checking is done for "default" and "toplevel".

    	To activate spell checking the 'spell' option must be set.

    :sy[ntax] spell
    	Show either "syntax spell toplevel", "syntax spell notoplevel" or
    	"syntax spell default" (translated).

    SYNTAX ISKEYWORD SETTING				*:syn-iskeyword*

    :sy[ntax] iskeyword [clear | {option}]
    	This defines the keyword characters.  It's like the 'iskeyword' option
    	for but only applies to syntax highlighting.

    	clear:		Syntax specific iskeyword setting is disabled and the
    			buffer-local 'iskeyword' setting is used.
    	{option}        Set the syntax 'iskeyword' option to a new value.

    	Example:
      :syntax iskeyword @,48-57,192-255,$,_

    	This would set the syntax specific iskeyword option to include all
    	alphabetic characters, plus the numeric characters, all accented
    	characters and also includes the "_" and the "$".

    	If no argument is given, the current value will be output.

    	Setting this option influences what |/\k| matches in syntax patterns
    	and also determines where |:syn-keyword| will be checked for a new
    	match.

    	It is recommended when writing syntax files, to use this command to
    	set the correct value for the specific syntax language and not change
    	the 'iskeyword' option.

    DEFINING KEYWORDS					*:syn-keyword*

    :sy[ntax] keyword {group-name} [{options}] {keyword} .. [{options}]

    	This defines a number of keywords.

    	{group-name}	Is a syntax group name such as "Comment".
    	[{options}]	See |:syn-arguments| below.
    	{keyword} ..	Is a list of keywords which are part of this group.

    	Example:
      :syntax keyword   Type   int long char

    	The {options} can be given anywhere in the line.  They will apply to
    	all keywords given, also for options that come after a keyword.
    	These examples do exactly the same:
      :syntax keyword   Type   contained int long char
      :syntax keyword   Type   int long contained char
      :syntax keyword   Type   int long char contained
    								*E789* *E890*
    	When you have a keyword with an optional tail, like Ex commands in
    	Vim, you can put the optional characters inside [], to define all the
    	variations at once:
      :syntax keyword   vimCommand	 ab[breviate] n[ext]

    	Don't forget that a keyword can only be recognized if all the
    	characters are included in the 'iskeyword' option.  If one character
    	isn't, the keyword will never be recognized.
    	Multi-byte characters can also be used.  These do not have to be in
    	'iskeyword'.
    	See |:syn-iskeyword| for defining syntax specific iskeyword settings.

    	A keyword always has higher priority than a match or region, the
    	keyword is used if more than one item matches.	Keywords do not nest
    	and a keyword can't contain anything else.

    	Note that when you have a keyword that is the same as an option (even
    	one that isn't allowed here), you can not use it.  Use a match
    	instead.

    	The maximum length of a keyword is 80 characters.

    	The same keyword can be defined multiple times, when its containment
    	differs.  For example, you can define the keyword once not contained
    	and use one highlight group, and once contained, and use a different
    	highlight group.  Example:
      :syn keyword vimCommand tag
      :syn keyword vimSetting contained tag
    	When finding "tag" outside of any syntax item, the "vimCommand"
    	highlight group is used.  When finding "tag" in a syntax item that
    	contains "vimSetting", the "vimSetting" group is used.

    DEFINING MATCHES					*:syn-match*

    :sy[ntax] match {group-name} [{options}]
    		[excludenl]
    		[keepend]
    		{pattern}
    		[{options}]

    	This defines one match.

    	{group-name}		A syntax group name such as "Comment".
    	[{options}]		See |:syn-arguments| below.
    	[excludenl]		Don't make a pattern with the end-of-line "$"
    				extend a containing match or region.  Must be
    				given before the pattern. |:syn-excludenl|
    	keepend			Don't allow contained matches to go past a
    				match with the end pattern.  See
    				|:syn-keepend|.
    	{pattern}		The search pattern that defines the match.
    				See |:syn-pattern| below.
    				Note that the pattern may match more than one
    				line, which makes the match depend on where
    				Vim starts searching for the pattern.  You
    				need to make sure syncing takes care of this.

    	Example (match a character constant):
      :syntax match Character /'.'/hs=s+1,he=e-1

    DEFINING REGIONS	*:syn-region* *:syn-start* *:syn-skip* *:syn-end*
    							*E398* *E399*
    :sy[ntax] region {group-name} [{options}]
    		[matchgroup={group-name}]
    		[keepend]
    		[extend]
    		[excludenl]
    		start={start_pattern} ..
    		[skip={skip_pattern}]
    		end={end_pattern} ..
    		[{options}]

    	This defines one region.  It may span several lines.

    	{group-name}		A syntax group name such as "Comment".
    	[{options}]		See |:syn-arguments| below.
    	[matchgroup={group-name}]  The syntax group to use for the following
    				start or end pattern matches only.  Not used
    				for the text in between the matched start and
    				end patterns.  Use NONE to reset to not using
    				a different group for the start or end match.
    				See |:syn-matchgroup|.
    	keepend			Don't allow contained matches to go past a
    				match with the end pattern.  See
    				|:syn-keepend|.
    	extend			Override a "keepend" for an item this region
    				is contained in.  See |:syn-extend|.
    	excludenl		Don't make a pattern with the end-of-line "$"
    				extend a containing match or item.  Only
    				useful for end patterns.  Must be given before
    				the patterns it applies to. |:syn-excludenl|
    	start={start_pattern}	The search pattern that defines the start of
    				the region.  See |:syn-pattern| below.
    	skip={skip_pattern}	The search pattern that defines text inside
    				the region where not to look for the end
    				pattern.  See |:syn-pattern| below.
    	end={end_pattern}	The search pattern that defines the end of
    				the region.  See |:syn-pattern| below.

    	Example:
      :syntax region String   start=+"+  skip=+\\"+  end=+"+

    	The start/skip/end patterns and the options can be given in any order.
    	There can be zero or one skip pattern.	There must be one or more
    	start and end patterns.  This means that you can omit the skip
    	pattern, but you must give at least one start and one end pattern.  It
    	is allowed to have white space before and after the equal sign
    	(although it mostly looks better without white space).

    	When more than one start pattern is given, a match with one of these
    	is sufficient.	This means there is an OR relation between the start
    	patterns.  The last one that matches is used.  The same is true for
    	the end patterns.

    	The search for the end pattern starts right after the start pattern.
    	Offsets are not used for this.	This implies that the match for the
    	end pattern will never overlap with the start pattern.

    	The skip and end pattern can match across line breaks, but since the
    	search for the pattern can start in any line it often does not do what
    	you want.  The skip pattern doesn't avoid a match of an end pattern in
    	the next line.	Use single-line patterns to avoid trouble.

    	Note: The decision to start a region is only based on a matching start
    	pattern.  There is no check for a matching end pattern.  This does NOT
    	work:
    		:syn region First  start="("  end=":"
    		:syn region Second start="("  end=";"
    	The Second always matches before the First (last defined pattern has
    	higher priority).  The Second region then continues until the next
    	';', no matter if there is a ':' before it.  Using a match does work:
    		:syn match First  "(\_.\{-}:"
    		:syn match Second "(\_.\{-};"
    	This pattern matches any character or line break with "\_." and
    	repeats that with "\{-}" (repeat as few as possible).

    							*:syn-keepend*
    	By default, a contained match can obscure a match for the end pattern.
    	This is useful for nesting.  For example, a region that starts with
    	"{" and ends with "}", can contain another region.  An encountered "}"
    	will then end the contained region, but not the outer region:
    	    {		starts outer "{}" region
    		{	starts contained "{}" region
    		}	ends contained "{}" region
    	    }		ends outer "{} region
    	If you don't want this, the "keepend" argument will make the matching
    	of an end pattern of the outer region also end any contained item.
    	This makes it impossible to nest the same region, but allows for
    	contained items to highlight parts of the end pattern, without causing
    	that to skip the match with the end pattern.  Example:
      :syn match  vimComment +"[^"]\+$+
      :syn region vimCommand start="set" end="$" contains=vimComment keepend
    	The "keepend" makes the vimCommand always end at the end of the line,
    	even though the contained vimComment includes a match with the <EOL>.

    	When "keepend" is not used, a match with an end pattern is retried
    	after each contained match.  When "keepend" is included, the first
    	encountered match with an end pattern is used, truncating any
    	contained matches.
    							*:syn-extend*
    	The "keepend" behavior can be changed by using the "extend" argument.
    	When an item with "extend" is contained in an item that uses
    	"keepend", the "keepend" is ignored and the containing region will be
    	extended.
    	This can be used to have some contained items extend a region while
    	others don't.  Example:

       :syn region htmlRef start=+<a>+ end=+</a>+ keepend contains=htmlItem,htmlScript
       :syn match htmlItem +<[^>]*>+ contained
       :syn region htmlScript start=+<script+ end=+</script[^>]*>+ contained extend

    	Here the htmlItem item does not make the htmlRef item continue
    	further, it is only used to highlight the <> items.  The htmlScript
    	item does extend the htmlRef item.

    	Another example:
       :syn region xmlFold start="<a>" end="</a>" fold transparent keepend extend
    	This defines a region with "keepend", so that its end cannot be
    	changed by contained items, like when the "</a>" is matched to
    	highlight it differently.  But when the xmlFold region is nested (it
    	includes itself), the "extend" applies, so that the "</a>" of a nested
    	region only ends that region, and not the one it is contained in.

    							*:syn-excludenl*
    	When a pattern for a match or end pattern of a region includes a '$'
    	to match the end-of-line, it will make a region item that it is
    	contained in continue on the next line.  For example, a match with
    	"\\$" (backslash at the end of the line) can make a region continue
    	that would normally stop at the end of the line.  This is the default
    	behavior.  If this is not wanted, there are two ways to avoid it:
    	1. Use "keepend" for the containing item.  This will keep all
    	   contained matches from extending the match or region.  It can be
    	   used when all contained items must not extend the containing item.
    	2. Use "excludenl" in the contained item.  This will keep that match
    	   from extending the containing match or region.  It can be used if
    	   only some contained items must not extend the containing item.
    	   "excludenl" must be given before the pattern it applies to.

    							*:syn-matchgroup*
    	"matchgroup" can be used to highlight the start and/or end pattern
    	differently than the body of the region.  Example:
      :syntax region String matchgroup=Quote start=+"+  skip=+\\"+	end=+"+
    	This will highlight the quotes with the "Quote" group, and the text in
    	between with the "String" group.
    	The "matchgroup" is used for all start and end patterns that follow,
    	until the next "matchgroup".  Use "matchgroup=NONE" to go back to not
    	using a matchgroup.

    	In a start or end pattern that is highlighted with "matchgroup" the
    	contained items of the region are not used.  This can be used to avoid
    	that a contained item matches in the start or end pattern match.  When
    	using "transparent", this does not apply to a start or end pattern
    	match that is highlighted with "matchgroup".

    	Here is an example, which highlights three levels of parentheses in
    	different colors:
       :sy region par1 matchgroup=par1 start=/(/ end=/)/ contains=par2
       :sy region par2 matchgroup=par2 start=/(/ end=/)/ contains=par3 contained
       :sy region par3 matchgroup=par3 start=/(/ end=/)/ contains=par1 contained
       :hi par1 ctermfg=red guifg=red
       :hi par2 ctermfg=blue guifg=blue
       :hi par3 ctermfg=darkgreen guifg=darkgreen

    						*E849*
    The maximum number of syntax groups is 19999.

    7. :syntax arguments					*:syn-arguments*

    The :syntax commands that define syntax items take a number of arguments.
    The common ones are explained here.  The arguments may be given in any order
    and may be mixed with patterns.

    Not all commands accept all arguments.	This table shows which arguments
    can not be used for all commands:
    							*E395*
    		    contains  oneline	fold  display  extend concealends
    :syntax keyword		 -	 -	 -	 -	 -      -
    :syntax match		yes	 -	yes	yes	yes     -
    :syntax region		yes	yes	yes	yes	yes    yes

    These arguments can be used for all three commands:
    	conceal
    	cchar
    	contained
    	containedin
    	nextgroup
    	transparent
    	skipwhite
    	skipnl
    	skipempty

    conceal						*conceal* *:syn-conceal*

    When the "conceal" argument is given, the item is marked as concealable.
    Whether or not it is actually concealed depends on the value of the
    'conceallevel' option.  The 'concealcursor' option is used to decide whether
    concealable items in the current line are displayed unconcealed to be able to
    edit the line.
    Another way to conceal text is with |matchadd()|.

    concealends						*:syn-concealends*

    When the "concealends" argument is given, the start and end matches of
    the region, but not the contents of the region, are marked as concealable.
    Whether or not they are actually concealed depends on the setting on the
    'conceallevel' option. The ends of a region can only be concealed separately
    in this way when they have their own highlighting via "matchgroup"

    cchar							*:syn-cchar*
    							*E844*
    The "cchar" argument defines the character shown in place of the item
    when it is concealed (setting "cchar" only makes sense when the conceal
    argument is given.) If "cchar" is not set then the default conceal
    character defined in the 'listchars' option is used.  The character cannot be
    a control character such as Tab.  Example:
       :syntax match Entity "&amp;" conceal cchar=&
    See |hl-Conceal| for highlighting.

    contained						*:syn-contained*

    When the "contained" argument is given, this item will not be recognized at
    the top level, but only when it is mentioned in the "contains" field of
    another match.	Example:
       :syntax keyword Todo    TODO    contained
       :syntax match   Comment "//.*"  contains=Todo

    display							*:syn-display*

    If the "display" argument is given, this item will be skipped when the
    detected highlighting will not be displayed.  This will speed up highlighting,
    by skipping this item when only finding the syntax state for the text that is
    to be displayed.

    Generally, you can use "display" for match and region items that meet these
    conditions:
    - The item does not continue past the end of a line.  Example for C: A region
      for a "/*" comment can't contain "display", because it continues on the next
      line.
    - The item does not contain items that continue past the end of the line or
      make it continue on the next line.
    - The item does not change the size of any item it is contained in.  Example
      for C: A match with "\\$" in a preprocessor match can't have "display",
      because it may make that preprocessor match shorter.
    - The item does not allow other items to match that didn't match otherwise,
      and that item may extend the match too far.  Example for C: A match for a
      "//" comment can't use "display", because a "/*" inside that comment would
      match then and start a comment which extends past the end of the line.

    Examples, for the C language, where "display" can be used:
    - match with a number
    - match with a label

    transparent						*:syn-transparent*

    If the "transparent" argument is given, this item will not be highlighted
    itself, but will take the highlighting of the item it is contained in.	This
    is useful for syntax items that don't need any highlighting but are used
    only to skip over a part of the text.

    The "contains=" argument is also inherited from the item it is contained in,
    unless a "contains" argument is given for the transparent item itself.	To
    avoid that unwanted items are contained, use "contains=NONE".  Example, which
    highlights words in strings, but makes an exception for "vim":
    	:syn match myString /'[^']*'/ contains=myWord,myVim
    	:syn match myWord   /\<[a-z]*\>/ contained
    	:syn match myVim    /\<vim\>/ transparent contained contains=NONE
    	:hi link myString String
    	:hi link myWord   Comment
    Since the "myVim" match comes after "myWord" it is the preferred match (last
    match in the same position overrules an earlier one).  The "transparent"
    argument makes the "myVim" match use the same highlighting as "myString".  But
    it does not contain anything.  If the "contains=NONE" argument would be left
    out, then "myVim" would use the contains argument from myString and allow
    "myWord" to be contained, which will be highlighted as a Constant.  This
    happens because a contained match doesn't match inside itself in the same
    position, thus the "myVim" match doesn't overrule the "myWord" match here.

    When you look at the colored text, it is like looking at layers of contained
    items.	The contained item is on top of the item it is contained in, thus you
    see the contained item.  When a contained item is transparent, you can look
    through, thus you see the item it is contained in.  In a picture:

    		look from here

    	    |	|   |	|   |	|
    	    V	V   V	V   V	V

    	       xxxx	  yyy		more contained items
    	    ....................	contained item (transparent)
    	=============================	first item

    The 'x', 'y' and '=' represent a highlighted syntax item.  The '.' represent a
    transparent group.

    What you see is:

    	=======xxxx=======yyy========

    Thus you look through the transparent "....".

    oneline							*:syn-oneline*

    The "oneline" argument indicates that the region does not cross a line
    boundary.  It must match completely in the current line.  However, when the
    region has a contained item that does cross a line boundary, it continues on
    the next line anyway.  A contained item can be used to recognize a line
    continuation pattern.  But the "end" pattern must still match in the first
    line, otherwise the region doesn't even start.

    When the start pattern includes a "\n" to match an end-of-line, the end
    pattern must be found in the same line as where the start pattern ends.  The
    end pattern may also include an end-of-line.  Thus the "oneline" argument
    means that the end of the start pattern and the start of the end pattern must
    be within one line.  This can't be changed by a skip pattern that matches a
    line break.

    fold							*:syn-fold*

    The "fold" argument makes the fold level increase by one for this item.
    Example:
       :syn region myFold start="{" end="}" transparent fold
       :syn sync fromstart
       :set foldmethod=syntax
    This will make each {} block form one fold.

    The fold will start on the line where the item starts, and end where the item
    ends.  If the start and end are within the same line, there is no fold.
    The 'foldnestmax' option limits the nesting of syntax folds.
    {not available when Vim was compiled without |+folding| feature}

    			*:syn-contains* *E405* *E406* *E407* *E408* *E409*
    contains={group-name},..

    The "contains" argument is followed by a list of syntax group names.  These
    groups will be allowed to begin inside the item (they may extend past the
    containing group's end).  This allows for recursive nesting of matches and
    regions.  If there is no "contains" argument, no groups will be contained in
    this item.  The group names do not need to be defined before they can be used
    here.

    contains=ALL
    		If the only item in the contains list is "ALL", then all
    		groups will be accepted inside the item.

    contains=ALLBUT,{group-name},..
    		If the first item in the contains list is "ALLBUT", then all
    		groups will be accepted inside the item, except the ones that
    		are listed.  Example:
      :syntax region Block start="{" end="}" ... contains=ALLBUT,Function

    contains=TOP
    		If the first item in the contains list is "TOP", then all
    		groups will be accepted that don't have the "contained"
    		argument.
    contains=TOP,{group-name},..
    		Like "TOP", but excluding the groups that are listed.

    contains=CONTAINED
    		If the first item in the contains list is "CONTAINED", then
    		all groups will be accepted that have the "contained"
    		argument.
    contains=CONTAINED,{group-name},..
    		Like "CONTAINED", but excluding the groups that are
    		listed.

    The {group-name} in the "contains" list can be a pattern.  All group names
    that match the pattern will be included (or excluded, if "ALLBUT" is used).
    The pattern cannot contain white space or a ','.  Example:
       ... contains=Comment.*,Keyw[0-3]
    The matching will be done at moment the syntax command is executed.  Groups
    that are defined later will not be matched.  Also, if the current syntax
    command defines a new group, it is not matched.  Be careful: When putting
    syntax commands in a file you can't rely on groups NOT being defined, because
    the file may have been sourced before, and ":syn clear" doesn't remove the
    group names.

    The contained groups will also match in the start and end patterns of a
    region.  If this is not wanted, the "matchgroup" argument can be used
    |:syn-matchgroup|.  The "ms=" and "me=" offsets can be used to change the
    region where contained items do match.	Note that this may also limit the
    area that is highlighted

    containedin={group-name}...				*:syn-containedin*

    The "containedin" argument is followed by a list of syntax group names.  The
    item will be allowed to begin inside these groups.  This works as if the
    containing item has a "contains=" argument that includes this item.

    The {group-name}... can be used just like for "contains", as explained above.

    This is useful when adding a syntax item afterwards.  An item can be told to
    be included inside an already existing item, without changing the definition
    of that item.  For example, to highlight a word in a C comment after loading
    the C syntax:
    	:syn keyword myword HELP containedin=cComment contained
    Note that "contained" is also used, to avoid that the item matches at the top
    level.

    Matches for "containedin" are added to the other places where the item can
    appear.  A "contains" argument may also be added as usual.  Don't forget that
    keywords never contain another item, thus adding them to "containedin" won't
    work.

    nextgroup={group-name},..				*:syn-nextgroup*

    The "nextgroup" argument is followed by a list of syntax group names,
    separated by commas (just like with "contains", so you can also use patterns).

    If the "nextgroup" argument is given, the mentioned syntax groups will be
    tried for a match, after the match or region ends.  If none of the groups have
    a match, highlighting continues normally.  If there is a match, this group
    will be used, even when it is not mentioned in the "contains" field of the
    current group.	This is like giving the mentioned group priority over all
    other groups.  Example:
       :syntax match  ccFoobar  "Foo.\{-}Bar"  contains=ccFoo
       :syntax match  ccFoo     "Foo"	    contained nextgroup=ccFiller
       :syntax region ccFiller  start="."  matchgroup=ccBar  end="Bar"  contained

    This will highlight "Foo" and "Bar" differently, and only when there is a
    "Bar" after "Foo".  In the text line below, "f" shows where ccFoo is used for
    highlighting, and "bbb" where ccBar is used.

       Foo asdfasd Bar asdf Foo asdf Bar asdf
       fff	       bbb	fff	 bbb

    Note the use of ".\{-}" to skip as little as possible until the next Bar.
    when ".*" would be used, the "asdf" in between "Bar" and "Foo" would be
    highlighted according to the "ccFoobar" group, because the ccFooBar match
    would include the first "Foo" and the last "Bar" in the line (see |pattern|).

    skipwhite						*:syn-skipwhite*
    skipnl							*:syn-skipnl*
    skipempty						*:syn-skipempty*

    These arguments are only used in combination with "nextgroup".	They can be
    used to allow the next group to match after skipping some text:
    	skipwhite	skip over space and tab characters
    	skipnl		skip over the end of a line
    	skipempty	skip over empty lines (implies a "skipnl")

    When "skipwhite" is present, the white space is only skipped if there is no
    next group that matches the white space.

    When "skipnl" is present, the match with nextgroup may be found in the next
    line.  This only happens when the current item ends at the end of the current
    line!  When "skipnl" is not present, the nextgroup will only be found after
    the current item in the same line.

    When skipping text while looking for a next group, the matches for other
    groups are ignored.  Only when no next group matches, other items are tried
    for a match again.  This means that matching a next group and skipping white
    space and <EOL>s has a higher priority than other items.

    Example:
      :syn match ifstart "\<if.*"	  nextgroup=ifline skipwhite skipempty
      :syn match ifline  "[^ \t].*" nextgroup=ifline skipwhite skipempty contained
      :syn match ifline  "endif"	contained
    Note that the "[^ \t].*" match matches all non-white text.  Thus it would also
    match "endif".	Therefore the "endif" match is put last, so that it takes
    precedence.
    Note that this example doesn't work for nested "if"s.  You need to add
    "contains" arguments to make that work (omitted for simplicity of the
    example).

    IMPLICIT CONCEAL					*:syn-conceal-implicit*

    :sy[ntax] conceal [on|off]
    	This defines if the following ":syntax" commands will define keywords,
    	matches or regions with the "conceal" flag set. After ":syn conceal
    	on", all subsequent ":syn keyword", ":syn match" or ":syn region"
    	defined will have the "conceal" flag set implicitly. ":syn conceal
    	off" returns to the normal state where the "conceal" flag must be
    	given explicitly.

    :sy[ntax] conceal
    	Show either "syntax conceal on" or "syntax conceal off" (translated).

    8. Syntax patterns				*:syn-pattern* *E401* *E402*

    In the syntax commands, a pattern must be surrounded by two identical
    characters.  This is like it works for the ":s" command.  The most common to
    use is the double quote.  But if the pattern contains a double quote, you can
    use another character that is not used in the pattern.	Examples:
      :syntax region Comment  start="/\*"  end="\*/"
      :syntax region String   start=+"+    end=+"+	 skip=+\\"+

    See |pattern| for the explanation of what a pattern is.  Syntax patterns are
    always interpreted like the 'magic' option is set, no matter what the actual
    value of 'magic' is.  And the patterns are interpreted like the 'l' flag is
    not included in 'cpoptions'.  This was done to make syntax files portable and
    independent of 'compatible' and 'magic' settings.

    Try to avoid patterns that can match an empty string, such as "[a-z]*".
    This slows down the highlighting a lot, because it matches everywhere.

    						*:syn-pattern-offset*
    The pattern can be followed by a character offset.  This can be used to
    change the highlighted part, and to change the text area included in the
    match or region (which only matters when trying to match other items).	Both
    are relative to the matched pattern.  The character offset for a skip
    pattern can be used to tell where to continue looking for an end pattern.

    The offset takes the form of "{what}={offset}"
    The {what} can be one of seven strings:

    ms	Match Start	offset for the start of the matched text
    me	Match End	offset for the end of the matched text
    hs	Highlight Start	offset for where the highlighting starts
    he	Highlight End	offset for where the highlighting ends
    rs	Region Start	offset for where the body of a region starts
    re	Region End	offset for where the body of a region ends
    lc	Leading Context	offset past "leading context" of pattern

    The {offset} can be:

    s	start of the matched pattern
    s+{nr}	start of the matched pattern plus {nr} chars to the right
    s-{nr}	start of the matched pattern plus {nr} chars to the left
    e	end of the matched pattern
    e+{nr}	end of the matched pattern plus {nr} chars to the right
    e-{nr}	end of the matched pattern plus {nr} chars to the left
    {nr}	(for "lc" only): start matching {nr} chars right of the start

    Examples: "ms=s+1", "hs=e-2", "lc=3".

    Although all offsets are accepted after any pattern, they are not always
    meaningful.  This table shows which offsets are actually used:

    		    ms	 me   hs   he	rs   re	  lc
    match item	    yes  yes  yes  yes	-    -	  yes
    region item start   yes  -    yes  -	yes  -	  yes
    region item skip    -	 yes  -    -	-    -	  yes
    region item end     -	 yes  -    yes	-    yes  yes

    Offsets can be concatenated, with a ',' in between.  Example:
      :syn match String  /"[^"]*"/hs=s+1,he=e-1

        some "string" text
    	  ^^^^^^		highlighted

    Notes:
    - There must be no white space between the pattern and the character
      offset(s).
    - The highlighted area will never be outside of the matched text.
    - A negative offset for an end pattern may not always work, because the end
      pattern may be detected when the highlighting should already have stopped.
    - Before Vim 7.2 the offsets were counted in bytes instead of characters.
      This didn't work well for multi-byte characters, so it was changed with the
      Vim 7.2 release.
    - The start of a match cannot be in a line other than where the pattern
      matched.  This doesn't work: "a\nb"ms=e.  You can make the highlighting
      start in another line, this does work: "a\nb"hs=e.

    Example (match a comment but don't highlight the /* and */):
      :syntax region Comment start="/\*"hs=e+1 end="\*/"he=s-1

    	/* this is a comment */
    	  ^^^^^^^^^^^^^^^^^^^	  highlighted

    A more complicated Example:
      :syn region Exa matchgroup=Foo start="foo"hs=s+2,rs=e+2 matchgroup=Bar end="bar"me=e-1,he=e-1,re=s-1

    	 abcfoostringbarabc
    	    mmmmmmmmmmm	    match
    	      sssrrreee	    highlight start/region/end ("Foo", "Exa" and "Bar")

    Leading context			*:syn-lc* *:syn-leading* *:syn-context*

    Note: This is an obsolete feature, only included for backwards compatibility
    with previous Vim versions.  It's now recommended to use the |/\@<=| construct
    in the pattern.

    The "lc" offset specifies leading context -- a part of the pattern that must
    be present, but is not considered part of the match.  An offset of "lc=n" will
    cause Vim to step back n columns before attempting the pattern match, allowing
    characters which have already been matched in previous patterns to also be
    used as leading context for this match.  This can be used, for instance, to
    specify that an "escaping" character must not precede the match:

      :syn match ZNoBackslash "[^\\]z"ms=s+1
      :syn match WNoBackslash "[^\\]w"lc=1
      :syn match Underline "_\+"

    	  ___zzzz ___wwww
    	  ^^^	  ^^^	  matches Underline
    	      ^ ^	  matches ZNoBackslash
    		     ^^^^ matches WNoBackslash

    The "ms" offset is automatically set to the same value as the "lc" offset,
    unless you set "ms" explicitly.

    Multi-line patterns					*:syn-multi-line*

    The patterns can include "\n" to match an end-of-line.	Mostly this works as
    expected, but there are a few exceptions.

    When using a start pattern with an offset, the start of the match is not
    allowed to start in a following line.  The highlighting can start in a
    following line though.  Using the "\zs" item also requires that the start of
    the match doesn't move to another line.

    The skip pattern can include the "\n", but the search for an end pattern will
    continue in the first character of the next line, also when that character is
    matched by the skip pattern.  This is because redrawing may start in any line
    halfway a region and there is no check if the skip pattern started in a
    previous line.	For example, if the skip pattern is "a\nb" and an end pattern
    is "b", the end pattern does match in the second line of this:
    	 x x a
    	 b x x
    Generally this means that the skip pattern should not match any characters
    after the "\n".

    External matches					*:syn-ext-match*

    These extra regular expression items are available in region patterns:

    					*/\z(* */\z(\)* *E50* *E52* *E879*
        \z(\)	Marks the sub-expression as "external", meaning that it can be
    		accessed from another pattern match.  Currently only usable in
    		defining a syntax region start pattern.

    					*/\z1* */\z2* */\z3* */\z4* */\z5*
        \z1  ...  \z9			*/\z6* */\z7* */\z8* */\z9* *E66* *E67*
    		Matches the same string that was matched by the corresponding
    		sub-expression in a previous start pattern match.

    Sometimes the start and end patterns of a region need to share a common
    sub-expression.  A common example is the "here" document in Perl and many Unix
    shells.  This effect can be achieved with the "\z" special regular expression
    items, which marks a sub-expression as "external", in the sense that it can be
    referenced from outside the pattern in which it is defined.  The here-document
    example, for instance, can be done like this:
      :syn region hereDoc start="<<\z(\I\i*\)" end="^\z1$"

    As can be seen here, the \z actually does double duty.	In the start pattern,
    it marks the "\(\I\i*\)" sub-expression as external; in the end pattern, it
    changes the \z1 back-reference into an external reference referring to the
    first external sub-expression in the start pattern.  External references can
    also be used in skip patterns:
      :syn region foo start="start \(\I\i*\)" skip="not end \z1" end="end \z1"

    Note that normal and external sub-expressions are completely orthogonal and
    indexed separately; for instance, if the pattern "\z(..\)\(..\)" is applied
    to the string "aabb", then \1 will refer to "bb" and \z1 will refer to "aa".
    Note also that external sub-expressions cannot be accessed as back-references
    within the same pattern like normal sub-expressions.  If you want to use one
    sub-expression as both a normal and an external sub-expression, you can nest
    the two, as in "\(\z(...\)\)".

    Note that only matches within a single line can be used.  Multi-line matches
    cannot be referred to.

    9. Syntax clusters					*:syn-cluster* *E400*

    :sy[ntax] cluster {cluster-name} [contains={group-name}..]
    				 [add={group-name}..]
    				 [remove={group-name}..]

    This command allows you to cluster a list of syntax groups together under a
    single name.

    	contains={group-name}..
    		The cluster is set to the specified list of groups.
    	add={group-name}..
    		The specified groups are added to the cluster.
    	remove={group-name}..
    		The specified groups are removed from the cluster.

    A cluster so defined may be referred to in a contains=.., containedin=..,
    nextgroup=.., add=..  or remove=.. list with a "@" prefix.  You can also use
    this notation to implicitly declare a cluster before specifying its contents.

    Example:
       :syntax match Thing "# [^#]\+ #" contains=@ThingMembers
       :syntax cluster ThingMembers contains=ThingMember1,ThingMember2

    As the previous example suggests, modifications to a cluster are effectively
    retroactive; the membership of the cluster is checked at the last minute, so
    to speak:
       :syntax keyword A aaa
       :syntax keyword B bbb
       :syntax cluster AandB contains=A
       :syntax match Stuff "( aaa bbb )" contains=@AandB
       :syntax cluster AandB add=B	  " now both keywords are matched in Stuff

    This also has implications for nested clusters:
       :syntax keyword A aaa
       :syntax keyword B bbb
       :syntax cluster SmallGroup contains=B
       :syntax cluster BigGroup contains=A,@SmallGroup
       :syntax match Stuff "( aaa bbb )" contains=@BigGroup
       :syntax cluster BigGroup remove=B	" no effect, since B isn't in BigGroup
       :syntax cluster SmallGroup remove=B	" now bbb isn't matched within Stuff

    						*E848*
    The maximum number of clusters is 9767.

    10. Including syntax files				*:syn-include* *E397*

    It is often useful for one language's syntax file to include a syntax file for
    a related language.  Depending on the exact relationship, this can be done in
    two different ways:

    	- If top-level syntax items in the included syntax file are to be
    	  allowed at the top level in the including syntax, you can simply use
    	  the |:runtime| command:

      " In cpp.vim:
      :runtime! syntax/c.vim
      :unlet b:current_syntax

    	- If top-level syntax items in the included syntax file are to be
    	  contained within a region in the including syntax, you can use the
    	  ":syntax include" command:

    :sy[ntax] include [@{grouplist-name}] {file-name}

    	  All syntax items declared in the included file will have the
    	  "contained" flag added.  In addition, if a group list is specified,
    	  all top-level syntax items in the included file will be added to
    	  that list.

       " In perl.vim:
       :syntax include @Pod <sfile>:p:h/pod.vim
       :syntax region perlPOD start="^=head" end="^=cut" contains=@Pod

    	  When {file-name} is an absolute path (starts with "/", "c:", "$VAR"
    	  or "<sfile>") that file is sourced.  When it is a relative path
    	  (e.g., "syntax/pod.vim") the file is searched for in 'runtimepath'.
    	  All matching files are loaded.  Using a relative path is
    	  recommended, because it allows a user to replace the included file
    	  with their own version, without replacing the file that does the
    	  ":syn include".

    						*E847*
    The maximum number of includes is 999.

    11. Synchronizing				*:syn-sync* *E403* *E404*

    Vim wants to be able to start redrawing in any position in the document.  To
    make this possible it needs to know the syntax state at the position where
    redrawing starts.

    :sy[ntax] sync [ccomment [group-name] | minlines={N} | ...]

    There are four ways to synchronize:
    1. Always parse from the start of the file.
       |:syn-sync-first|
    2. Based on C-style comments.  Vim understands how C-comments work and can
       figure out if the current line starts inside or outside a comment.
       |:syn-sync-second|
    3. Jumping back a certain number of lines and start parsing there.
       |:syn-sync-third|
    4. Searching backwards in the text for a pattern to sync on.
       |:syn-sync-fourth|

    				*:syn-sync-maxlines* *:syn-sync-minlines*
    For the last three methods, the line range where the parsing can start is
    limited by "minlines" and "maxlines".

    If the "minlines={N}" argument is given, the parsing always starts at least
    that many lines backwards.  This can be used if the parsing may take a few
    lines before it's correct, or when it's not possible to use syncing.

    If the "maxlines={N}" argument is given, the number of lines that are searched
    for a comment or syncing pattern is restricted to N lines backwards (after
    adding "minlines").  This is useful if you have few things to sync on and a
    slow machine.  Example:
       :syntax sync maxlines=500 ccomment

    						*:syn-sync-linebreaks*
    When using a pattern that matches multiple lines, a change in one line may
    cause a pattern to no longer match in a previous line.	This means has to
    start above where the change was made.	How many lines can be specified with
    the "linebreaks" argument.  For example, when a pattern may include one line
    break use this:
       :syntax sync linebreaks=1
    The result is that redrawing always starts at least one line before where a
    change was made.  The default value for "linebreaks" is zero.  Usually the
    value for "minlines" is bigger than "linebreaks".

    First syncing method:			*:syn-sync-first*

       :syntax sync fromstart

    The file will be parsed from the start.  This makes syntax highlighting
    accurate, but can be slow for long files.  Vim caches previously parsed text,
    so that it's only slow when parsing the text for the first time.  However,
    when making changes some part of the text needs to be parsed again (worst
    case: to the end of the file).

    Using "fromstart" is equivalent to using "minlines" with a very large number.

    Second syncing method:			*:syn-sync-second* *:syn-sync-ccomment*

    For the second method, only the "ccomment" argument needs to be given.
    Example:
       :syntax sync ccomment

    When Vim finds that the line where displaying starts is inside a C-style
    comment, the last region syntax item with the group-name "Comment" will be
    used.  This requires that there is a region with the group-name "Comment"!
    An alternate group name can be specified, for example:
       :syntax sync ccomment javaComment
    This means that the last item specified with "syn region javaComment" will be
    used for the detected C comment region.  This only works properly if that
    region does have a start pattern "\/*" and an end pattern "*\/".

    The "maxlines" argument can be used to restrict the search to a number of
    lines.	The "minlines" argument can be used to at least start a number of
    lines back (e.g., for when there is some construct that only takes a few
    lines, but it hard to sync on).

    Note: Syncing on a C comment doesn't work properly when strings are used
    that cross a line and contain a "*/".  Since letting strings cross a line
    is a bad programming habit (many compilers give a warning message), and the
    chance of a "*/" appearing inside a comment is very small, this restriction
    is hardly ever noticed.

    Third syncing method:				*:syn-sync-third*

    For the third method, only the "minlines={N}" argument needs to be given.
    Vim will subtract {N} from the line number and start parsing there.  This
    means {N} extra lines need to be parsed, which makes this method a bit slower.
    Example:
       :syntax sync minlines=50

    "lines" is equivalent to "minlines" (used by older versions).

    Fourth syncing method:				*:syn-sync-fourth*

    The idea is to synchronize on the end of a few specific regions, called a
    sync pattern.  Only regions can cross lines, so when we find the end of some
    region, we might be able to know in which syntax item we are.  The search
    starts in the line just above the one where redrawing starts.  From there
    the search continues backwards in the file.

    This works just like the non-syncing syntax items.  You can use contained
    matches, nextgroup, etc.  But there are a few differences:
    - Keywords cannot be used.
    - The syntax items with the "sync" keyword form a completely separated group
      of syntax items.  You can't mix syncing groups and non-syncing groups.
    - The matching works backwards in the buffer (line by line), instead of
      forwards.
    - A line continuation pattern can be given.  It is used to decide which group
      of lines need to be searched like they were one line.  This means that the
      search for a match with the specified items starts in the first of the
      consecutive that contain the continuation pattern.
    - When using "nextgroup" or "contains", this only works within one line (or
      group of continued lines).
    - When using a region, it must start and end in the same line (or group of
      continued lines).  Otherwise the end is assumed to be at the end of the
      line (or group of continued lines).
    - When a match with a sync pattern is found, the rest of the line (or group of
      continued lines) is searched for another match.  The last match is used.
      This is used when a line can contain both the start end the end of a region
      (e.g., in a C-comment like /* this */, the last "*/" is used).

    There are two ways how a match with a sync pattern can be used:
    1. Parsing for highlighting starts where redrawing starts (and where the
       search for the sync pattern started).  The syntax group that is expected
       to be valid there must be specified.  This works well when the regions
       that cross lines cannot contain other regions.
    2. Parsing for highlighting continues just after the match.  The syntax group
       that is expected to be present just after the match must be specified.
       This can be used when the previous method doesn't work well.  It's much
       slower, because more text needs to be parsed.
    Both types of sync patterns can be used at the same time.

    Besides the sync patterns, other matches and regions can be specified, to
    avoid finding unwanted matches.

    [The reason that the sync patterns are given separately, is that mostly the
    search for the sync point can be much simpler than figuring out the
    highlighting.  The reduced number of patterns means it will go (much)
    faster.]

    					    *syn-sync-grouphere* *E393* *E394*
        :syntax sync match {sync-group-name} grouphere {group-name} "pattern" ..

    	Define a match that is used for syncing.  {group-name} is the
    	name of a syntax group that follows just after the match.  Parsing
    	of the text for highlighting starts just after the match.  A region
    	must exist for this {group-name}.  The first one defined will be used.
    	"NONE" can be used for when there is no syntax group after the match.

    						*syn-sync-groupthere*
        :syntax sync match {sync-group-name} groupthere {group-name} "pattern" ..

    	Like "grouphere", but {group-name} is the name of a syntax group that
    	is to be used at the start of the line where searching for the sync
    	point started.	The text between the match and the start of the sync
    	pattern searching is assumed not to change the syntax highlighting.
    	For example, in C you could search backwards for "/*" and "*/".  If
    	"/*" is found first, you know that you are inside a comment, so the
    	"groupthere" is "cComment".  If "*/" is found first, you know that you
    	are not in a comment, so the "groupthere" is "NONE".  (in practice
    	it's a bit more complicated, because the "/*" and "*/" could appear
    	inside a string.  That's left as an exercise to the reader...).

        :syntax sync match ..
        :syntax sync region ..

    	Without a "groupthere" argument.  Define a region or match that is
    	skipped while searching for a sync point.

    						*syn-sync-linecont*
        :syntax sync linecont {pattern}

    	When {pattern} matches in a line, it is considered to continue in
    	the next line.	This means that the search for a sync point will
    	consider the lines to be concatenated.

    If the "maxlines={N}" argument is given too, the number of lines that are
    searched for a match is restricted to N.  This is useful if you have very
    few things to sync on and a slow machine.  Example:
       :syntax sync maxlines=100

    You can clear all sync settings with:
       :syntax sync clear

    You can clear specific sync patterns with:
       :syntax sync clear {sync-group-name} ..

    12. Listing syntax items		*:syntax* *:sy* *:syn* *:syn-list*

    This command lists all the syntax items:

        :sy[ntax] [list]

    To show the syntax items for one syntax group:

        :sy[ntax] list {group-name}

    To list the syntax groups in one cluster:			*E392*

        :sy[ntax] list @{cluster-name}

    See above for other arguments for the ":syntax" command.

    Note that the ":syntax" command can be abbreviated to ":sy", although ":syn"
    is mostly used, because it looks better.

    13. Highlight command			*:highlight* *:hi* *E28* *E411* *E415*

    There are three types of highlight groups:
    - The ones used for specific languages.  For these the name starts with the
      name of the language.  Many of these don't have any attributes, but are
      linked to a group of the second type.
    - The ones used for all syntax languages.
    - The ones used for the 'highlight' option.
    							*hitest.vim*
    You can see all the groups currently active with this command:
        :so $VIMRUNTIME/syntax/hitest.vim
    This will open a new window containing all highlight group names, displayed
    in their own color.

    						*:colo* *:colorscheme* *E185*
    :colo[rscheme]		Output the name of the currently active color scheme.
    			This is basically the same as
    				:echo g:colors_name
    			In case g:colors_name has not been defined :colo will
    			output "default".  When compiled without the |+eval|
    			feature it will output "unknown".

    :colo[rscheme] {name}	Load color scheme {name}.  This searches 'runtimepath'
    			for the file "colors/{name}.vim".  The first one that
    			is found is loaded.
    			Also searches all plugins in 'packpath', first below
    			"start" and then under "opt".

    			Doesn't work recursively, thus you can't use
    			":colorscheme" in a color scheme script.

    			To customize a color scheme use another name, e.g.
    			"~/.vim/colors/mine.vim", and use `:runtime` to load
    			the original color scheme:
    				runtime colors/evening.vim
    				hi Statement ctermfg=Blue guifg=Blue

    			Before the color scheme will be loaded the
    			|ColorSchemePre| autocommand event is triggered.
    			After the color scheme has been loaded the
    			|ColorScheme| autocommand event is triggered.
    			For info about writing a color scheme file:
    				:edit $VIMRUNTIME/colors/README.txt

    :hi[ghlight]		List all the current highlight groups that have
    			attributes set.

    :hi[ghlight] {group-name}
    			List one highlight group.

    :hi[ghlight] clear	Reset all highlighting to the defaults.  Removes all
    			highlighting for groups added by the user!
    			Uses the current value of 'background' to decide which
    			default colors to use.

    :hi[ghlight] clear {group-name}
    :hi[ghlight] {group-name} NONE
    			Disable the highlighting for one highlight group.  It
    			is _not_ set back to the default colors.

    :hi[ghlight] [default] {group-name} {key}={arg} ..
    			Add a highlight group, or change the highlighting for
    			an existing group.
    			See |highlight-args| for the {key}={arg} arguments.
    			See |:highlight-default| for the optional [default]
    			argument.

    Normally a highlight group is added once when starting up.  This sets the
    default values for the highlighting.  After that, you can use additional
    highlight commands to change the arguments that you want to set to non-default
    values.  The value "NONE" can be used to switch the value off or go back to
    the default value.

    A simple way to change colors is with the |:colorscheme| command.  This loads
    a file with ":highlight" commands such as this:

       :hi Comment	gui=bold

    Note that all settings that are not included remain the same, only the
    specified field is used, and settings are merged with previous ones.  So, the
    result is like this single command has been used:
       :hi Comment	term=bold ctermfg=Cyan guifg=#80a0ff gui=bold

    							*:highlight-verbose*
    When listing a highlight group and 'verbose' is non-zero, the listing will
    also tell where it was last set.  Example:
    	:verbose hi Comment
    	Comment        xxx term=bold ctermfg=4 guifg=Blue
    	   Last set from /home/mool/vim/vim7/runtime/syntax/syncolor.vim

    When ":hi clear" is used then the script where this command is used will be
    mentioned for the default values. See |:verbose-cmd| for more information.

    					*highlight-args* *E416* *E417* *E423*
    There are three types of terminals for highlighting:
    term	a normal terminal (vt100, xterm)
    cterm	a color terminal (MS-Windows console, color-xterm, these have the "Co"
    	termcap entry)
    gui	the GUI

    For each type the highlighting can be given.  This makes it possible to use
    the same syntax file on all terminals, and use the optimal highlighting.

    1. highlight arguments for normal terminals

    					*bold* *underline* *undercurl*
    					*inverse* *italic* *standout*
    					*nocombine* *strikethrough*
    term={attr-list}			*attr-list* *highlight-term* *E418*
    	attr-list is a comma separated list (without spaces) of the
    	following items (in any order):
    		bold
    		underline
    		undercurl	not always available
    		strikethrough	not always available
    		reverse
    		inverse		same as reverse
    		italic
    		standout
    		nocombine	override attributes instead of combining them
    		NONE		no attributes used (used to reset it)

    	Note that "bold" can be used here and by using a bold font.  They
    	have the same effect.
    	"undercurl" is a curly underline.  When "undercurl" is not possible
    	then "underline" is used.  In general "undercurl" and "strikethrough"
    	is only available in the GUI.  The color is set with |highlight-guisp|.

    start={term-list}				*highlight-start* *E422*
    stop={term-list}				*term-list* *highlight-stop*
    	These lists of terminal codes can be used to get
    	non-standard attributes on a terminal.

    	The escape sequence specified with the "start" argument
    	is written before the characters in the highlighted
    	area.  It can be anything that you want to send to the
    	terminal to highlight this area.  The escape sequence
    	specified with the "stop" argument is written after the
    	highlighted area.  This should undo the "start" argument.
    	Otherwise the screen will look messed up.

    	The {term-list} can have two forms:

    	1. A string with escape sequences.
    	   This is any string of characters, except that it can't start with
    	   "t_" and blanks are not allowed.  The <> notation is recognized
    	   here, so you can use things like "<Esc>" and "<Space>".  Example:
    		start=<Esc>[27h;<Esc>[<Space>r;

    	2. A list of terminal codes.
    	   Each terminal code has the form "t_xx", where "xx" is the name of
    	   the termcap entry.  The codes have to be separated with commas.
    	   White space is not allowed.	Example:
    		start=t_C1,t_BL
    	   The terminal codes must exist for this to work.

    2. highlight arguments for color terminals

    cterm={attr-list}					*highlight-cterm*
    	See above for the description of {attr-list} |attr-list|.
    	The "cterm" argument is likely to be different from "term", when
    	colors are used.  For example, in a normal terminal comments could
    	be underlined, in a color terminal they can be made Blue.
    	Note: Some terminals (e.g., DOS console) can't mix these attributes
    	with coloring.	To be portable, use only one of "cterm=" OR "ctermfg="
    	OR "ctermbg=".

    ctermfg={color-nr}				*highlight-ctermfg* *E421*
    ctermbg={color-nr}				*highlight-ctermbg*
    	The {color-nr} argument is a color number.  Its range is zero to
    	(not including) the number given by the termcap entry "Co".
    	The actual color with this number depends on the type of terminal
    	and its settings.  Sometimes the color also depends on the settings of
    	"cterm".  For example, on some systems "cterm=bold ctermfg=3" gives
    	another color, on others you just get color 3.

    	For an xterm this depends on your resources, and is a bit
    	unpredictable.	See your xterm documentation for the defaults.	The
    	colors for a color-xterm can be changed from the .Xdefaults file.
    	Unfortunately this means that it's not possible to get the same colors
    	for each user.	See |xterm-color| for info about color xterms.

    	The MS-Windows standard colors are fixed (in a console window), so
    	these have been used for the names.  But the meaning of color names in
    	X11 are fixed, so these color settings have been used, to make the
    	highlighting settings portable (complicated, isn't it?).  The
    	following names are recognized, with the color number used:

    							*cterm-colors*
    	    NR-16   NR-8    COLOR NAME
    	    0	    0	    Black
    	    1	    4	    DarkBlue
    	    2	    2	    DarkGreen
    	    3	    6	    DarkCyan
    	    4	    1	    DarkRed
    	    5	    5	    DarkMagenta
    	    6	    3	    Brown, DarkYellow
    	    7	    7	    LightGray, LightGrey, Gray, Grey
    	    8	    0*	    DarkGray, DarkGrey
    	    9	    4*	    Blue, LightBlue
    	    10	    2*	    Green, LightGreen
    	    11	    6*	    Cyan, LightCyan
    	    12	    1*	    Red, LightRed
    	    13	    5*	    Magenta, LightMagenta
    	    14	    3*	    Yellow, LightYellow
    	    15	    7*	    White

    	The number under "NR-16" is used for 16-color terminals ('t_Co'
    	greater than or equal to 16).  The number under "NR-8" is used for
    	8-color terminals ('t_Co' less than 16).  The '*' indicates that the
    	bold attribute is set for ctermfg.  In many 8-color terminals (e.g.,
    	"linux"), this causes the bright colors to appear.  This doesn't work
    	for background colors!	Without the '*' the bold attribute is removed.
    	If you want to set the bold attribute in a different way, put a
    	"cterm=" argument AFTER the "ctermfg=" or "ctermbg=" argument.	Or use
    	a number instead of a color name.

    	The case of the color names is ignored.
    	Note that for 16 color ansi style terminals (including xterms), the
    	numbers in the NR-8 column is used.  Here '*' means 'add 8' so that Blue
    	is 12, DarkGray is 8 etc.

    	Note that for some color terminals these names may result in the wrong
    	colors!

    	You can also use "NONE" to remove the color.

    							*:hi-normal-cterm*
    	When setting the "ctermfg" or "ctermbg" colors for the Normal group,
    	these will become the colors used for the non-highlighted text.
    	Example:
    		:highlight Normal ctermfg=grey ctermbg=darkblue
    	When setting the "ctermbg" color for the Normal group, the
    	'background' option will be adjusted automatically, under the
    	condition that the color is recognized and 'background' was not set
    	explicitly.  This causes the highlight groups that depend on
    	'background' to change!  This means you should set the colors for
    	Normal first, before setting other colors.
    	When a color scheme is being used, changing 'background' causes it to
    	be reloaded, which may reset all colors (including Normal).  First
    	delete the "g:colors_name" variable when you don't want this.

    	When you have set "ctermfg" or "ctermbg" for the Normal group, Vim
    	needs to reset the color when exiting.	This is done with the "op"
    	termcap entry |t_op|.  If this doesn't work correctly, try setting the
    	't_op' option in your .vimrc.
    							*E419* *E420*
    	When Vim knows the normal foreground and background colors, "fg" and
    	"bg" can be used as color names.  This only works after setting the
    	colors for the Normal group and for the MS-Windows console.  Example,
    	for reverse video:
    	    :highlight Visual ctermfg=bg ctermbg=fg
    	Note that the colors are used that are valid at the moment this
    	command are given.  If the Normal group colors are changed later, the
    	"fg" and "bg" colors will not be adjusted.

    3. highlight arguments for the GUI

    gui={attr-list}						*highlight-gui*
    	These give the attributes to use in the GUI mode.
    	See |attr-list| for a description.
    	Note that "bold" can be used here and by using a bold font.  They
    	have the same effect.
    	Note that the attributes are ignored for the "Normal" group.

    font={font-name}					*highlight-font*
    	font-name is the name of a font, as it is used on the system Vim
    	runs on.  For X11 this is a complicated name, for example:
       font=-misc-fixed-bold-r-normal--14-130-75-75-c-70-iso8859-1

    	The font-name "NONE" can be used to revert to the default font.
    	When setting the font for the "Normal" group, this becomes the default
    	font (until the 'guifont' option is changed; the last one set is
    	used).
    	The following only works with Motif and Athena, not with other GUIs:
    	When setting the font for the "Menu" group, the menus will be changed.
    	When setting the font for the "Tooltip" group, the tooltips will be
    	changed.
    	All fonts used, except for Menu and Tooltip, should be of the same
    	character size as the default font!  Otherwise redrawing problems will
    	occur.
    	To use a font name with an embedded space or other special character,
    	put it in single quotes.  The single quote cannot be used then.
    	Example:
    	    :hi comment font='Monospace 10'

    guifg={color-name}					*highlight-guifg*
    guibg={color-name}					*highlight-guibg*
    guisp={color-name}					*highlight-guisp*
    	These give the foreground (guifg), background (guibg) and special
    	(guisp) color to use in the GUI.  "guisp" is used for undercurl and
    	strikethrough.
    	There are a few special names:
    		NONE		no color (transparent)
    		bg		use normal background color
    		background	use normal background color
    		fg		use normal foreground color
    		foreground	use normal foreground color
    	To use a color name with an embedded space or other special character,
    	put it in single quotes.  The single quote cannot be used then.
    	Example:
    	    :hi comment guifg='salmon pink'

    							*gui-colors*
    	Suggested color names (these are available on most systems):
    	    Red		LightRed	DarkRed
    	    Green	LightGreen	DarkGreen	SeaGreen
    	    Blue	LightBlue	DarkBlue	SlateBlue
    	    Cyan	LightCyan	DarkCyan
    	    Magenta	LightMagenta	DarkMagenta
    	    Yellow	LightYellow	Brown		DarkYellow
    	    Gray	LightGray	DarkGray
    	    Black	White
    	    Orange	Purple		Violet

    	In the Win32 GUI version, additional system colors are available.  See
    	|win32-colors|.

    	You can also specify a color by its Red, Green and Blue values.
    	The format is "#rrggbb", where
    		"rr"	is the Red value
    		"gg"	is the Green value
    		"bb"	is the Blue value
    	All values are hexadecimal, range from "00" to "ff".  Examples:
      :highlight Comment guifg=#11f0c3 guibg=#ff00ff

    					*highlight-groups* *highlight-default*
    These are the default highlighting groups.  These groups are used by the
    'highlight' option default.  Note that the highlighting depends on the value
    of 'background'.  You can see the current settings with the ":highlight"
    command.
    							*hl-ColorColumn*
    ColorColumn	used for the columns set with 'colorcolumn'
    							*hl-Conceal*
    Conceal		placeholder characters substituted for concealed
    		text (see 'conceallevel')
    							*hl-Cursor*
    Cursor		the character under the cursor
    lCursor		the character under the cursor when |language-mapping|
    		is used (see 'guicursor')
    							*hl-CursorIM*
    CursorIM	like Cursor, but used when in IME mode |CursorIM|
    							*hl-CursorColumn*
    CursorColumn	the screen column that the cursor is in when 'cursorcolumn' is
    		set
    							*hl-CursorLine*
    CursorLine	the screen line that the cursor is in when 'cursorline' is
    		set
    							*hl-Directory*
    Directory	directory names (and other special names in listings)
    							*hl-DiffAdd*
    DiffAdd		diff mode: Added line |diff|
    							*hl-DiffChange*
    DiffChange	diff mode: Changed line |diff|
    							*hl-DiffDelete*
    DiffDelete	diff mode: Deleted line |diff|
    							*hl-DiffText*
    DiffText	diff mode: Changed text within a changed line |diff|
    							*hl-EndOfBuffer*
    EndOfBuffer	filler lines (~) after the last line in the buffer.
    		By default, this is highlighted like |hl-NonText|.
    							*hl-ErrorMsg*
    ErrorMsg	error messages on the command line
    							*hl-VertSplit*
    VertSplit	the column separating vertically split windows
    							*hl-Folded*
    Folded		line used for closed folds
    							*hl-FoldColumn*
    FoldColumn	'foldcolumn'
    							*hl-SignColumn*
    SignColumn	column where |signs| are displayed
    							*hl-IncSearch*
    IncSearch	'incsearch' highlighting; also used for the text replaced with
    		":s///c"
    							*hl-LineNr*
    LineNr		Line number for ":number" and ":#" commands, and when 'number'
    		or 'relativenumber' option is set.
    							*hl-LineNrAbove*
    LineNrAbove	Line number for when the 'relativenumber'
    		option is set, above the cursor line.
    							*hl-LineNrBelow*
    LineNrBelow	Line number for when the 'relativenumber'
    		option is set, below the cursor line.
    							*hl-CursorLineNr*
    CursorLineNr	Like LineNr when 'cursorline' is set and 'cursorlineopt' is
    		set to "number" or "both", or 'relativenumber' is set, for
    		the cursor line.
    							*hl-MatchParen*
    MatchParen	The character under the cursor or just before it, if it
    		is a paired bracket, and its match. |pi_paren|

    							*hl-ModeMsg*
    ModeMsg		'showmode' message (e.g., "-- INSERT --")
    							*hl-MoreMsg*
    MoreMsg		|more-prompt|
    							*hl-NonText*
    NonText		'@' at the end of the window, characters from 'showbreak'
    		and other characters that do not really exist in the text
    		(e.g., ">" displayed when a double-wide character doesn't
    		fit at the end of the line).
    							*hl-Normal*
    Normal		normal text
    							*hl-Pmenu*
    Pmenu		Popup menu: normal item.
    							*hl-PmenuSel*
    PmenuSel	Popup menu: selected item.
    							*hl-PmenuSbar*
    PmenuSbar	Popup menu: scrollbar.
    							*hl-PmenuThumb*
    PmenuThumb	Popup menu: Thumb of the scrollbar.
    							*hl-Question*
    Question	|hit-enter| prompt and yes/no questions
    							*hl-QuickFixLine*
    QuickFixLine	Current |quickfix| item in the quickfix window.
    							*hl-Search*
    Search		Last search pattern highlighting (see 'hlsearch').
    		Also used for similar items that need to stand out.
    							*hl-SpecialKey*
    SpecialKey	Meta and special keys listed with ":map", also for text used
    		to show unprintable characters in the text, 'listchars'.
    		Generally: text that is displayed differently from what it
    		really is.
    							*hl-SpellBad*
    SpellBad	Word that is not recognized by the spellchecker. |spell|
    		This will be combined with the highlighting used otherwise.
    							*hl-SpellCap*
    SpellCap	Word that should start with a capital. |spell|
    		This will be combined with the highlighting used otherwise.
    							*hl-SpellLocal*
    SpellLocal	Word that is recognized by the spellchecker as one that is
    		used in another region. |spell|
    		This will be combined with the highlighting used otherwise.
    							*hl-SpellRare*
    SpellRare	Word that is recognized by the spellchecker as one that is
    		hardly ever used. |spell|
    		This will be combined with the highlighting used otherwise.
    							*hl-StatusLine*
    StatusLine	status line of current window
    							*hl-StatusLineNC*
    StatusLineNC	status lines of not-current windows
    		Note: if this is equal to "StatusLine" Vim will use "^^^" in
    		the status line of the current window.
    							*hl-StatusLineTerm*
    StatusLineTerm	status line of current window, if it is a |terminal| window.
    							*hl-StatusLineTermNC*
    StatusLineTermNC   status lines of not-current windows that is a |terminal|
    		window.
    							*hl-TabLine*
    TabLine		tab pages line, not active tab page label
    							*hl-TabLineFill*
    TabLineFill	tab pages line, where there are no labels
    							*hl-TabLineSel*
    TabLineSel	tab pages line, active tab page label
    							*hl-Terminal*
    Terminal	|terminal| window (see |terminal-size-color|)
    							*hl-Title*
    Title		titles for output from ":set all", ":autocmd" etc.
    							*hl-Visual*
    Visual		Visual mode selection
    							*hl-VisualNOS*
    VisualNOS	Visual mode selection when vim is "Not Owning the Selection".
    		Only X11 Gui's |gui-x11| and |xterm-clipboard| supports this.
    							*hl-WarningMsg*
    WarningMsg	warning messages
    							*hl-WildMenu*
    WildMenu	current match in 'wildmenu' completion

    					*hl-User1* *hl-User1..9* *hl-User9*
    The 'statusline' syntax allows the use of 9 different highlights in the
    statusline and ruler (via 'rulerformat').  The names are User1 to User9.

    For the GUI you can use the following groups to set the colors for the menu,
    scrollbars and tooltips.  They don't have defaults.  This doesn't work for the
    Win32 GUI.  Only three highlight arguments have any effect here: font, guibg,
    and guifg.

    							*hl-Menu*
    Menu		Current font, background and foreground colors of the menus.
    		Also used for the toolbar.
    		Applicable highlight arguments: font, guibg, guifg.

    		NOTE: For Motif and Athena the font argument actually
    		specifies a fontset at all times, no matter if 'guifontset' is
    		empty, and as such it is tied to the current |:language| when
    		set.

    							*hl-Scrollbar*
    Scrollbar	Current background and foreground of the main window's
    		scrollbars.
    		Applicable highlight arguments: guibg, guifg.

    							*hl-Tooltip*
    Tooltip		Current font, background and foreground of the tooltips.
    		Applicable highlight arguments: font, guibg, guifg.

    		NOTE: For Motif and Athena the font argument actually
    		specifies a fontset at all times, no matter if 'guifontset' is
    		empty, and as such it is tied to the current |:language| when
    		set.

    14. Linking groups		*:hi-link* *:highlight-link* *E412* *E413*

    When you want to use the same highlighting for several syntax groups, you
    can do this more easily by linking the groups into one common highlight
    group, and give the color attributes only for that group.

    To set a link:

        :hi[ghlight][!] [default] link {from-group} {to-group}

    To remove a link:

        :hi[ghlight][!] [default] link {from-group} NONE

    Notes:							*E414*
    - If the {from-group} and/or {to-group} doesn't exist, it is created.  You
      don't get an error message for a non-existing group.
    - As soon as you use a ":highlight" command for a linked group, the link is
      removed.
    - If there are already highlight settings for the {from-group}, the link is
      not made, unless the '!' is given.  For a ":highlight link" command in a
      sourced file, you don't get an error message.  This can be used to skip
      links for groups that already have settings.

    					*:hi-default* *:highlight-default*
    The [default] argument is used for setting the default highlighting for a
    group.	If highlighting has already been specified for the group the command
    will be ignored.  Also when there is an existing link.

    Using [default] is especially useful to overrule the highlighting of a
    specific syntax file.  For example, the C syntax file contains:
    	:highlight default link cComment Comment
    If you like Question highlighting for C comments, put this in your vimrc file:
    	:highlight link cComment Question
    Without the "default" in the C syntax file, the highlighting would be
    overruled when the syntax file is loaded.

    15. Cleaning up						*:syn-clear* *E391*

    If you want to clear the syntax stuff for the current buffer, you can use this
    command:
      :syntax clear

    This command should be used when you want to switch off syntax highlighting,
    or when you want to switch to using another syntax.  It's normally not needed
    in a syntax file itself, because syntax is cleared by the autocommands that
    load the syntax file.
    The command also deletes the "b:current_syntax" variable, since no syntax is
    loaded after this command.

    To clean up specific syntax groups for the current buffer:
      :syntax clear {group-name} ..
    This removes all patterns and keywords for {group-name}.

    To clean up specific syntax group lists for the current buffer:
      :syntax clear @{grouplist-name} ..
    This sets {grouplist-name}'s contents to an empty list.

    						*:syntax-off* *:syn-off*
    If you want to disable syntax highlighting for all buffers, you need to remove
    the autocommands that load the syntax files:
      :syntax off

    What this command actually does, is executing the command
      :source $VIMRUNTIME/syntax/nosyntax.vim
    See the "nosyntax.vim" file for details.  Note that for this to work
    $VIMRUNTIME must be valid.  See |$VIMRUNTIME|.

    						*:syntax-reset* *:syn-reset*
    If you have changed the colors and messed them up, use this command to get the
    defaults back:

      :syntax reset

    It is a bit of a wrong name, since it does not reset any syntax items, it only
    affects the highlighting.

    This doesn't change the colors for the 'highlight' option.

    Note that the syntax colors that you set in your vimrc file will also be reset
    back to their Vim default.
    Note that if you are using a color scheme, the colors defined by the color
    scheme for syntax highlighting will be lost.

    What this actually does is:

    	let g:syntax_cmd = "reset"
    	runtime! syntax/syncolor.vim

    Note that this uses the 'runtimepath' option.

    							*syncolor*
    If you want to use different colors for syntax highlighting, you can add a Vim
    script file to set these colors.  Put this file in a directory in
    'runtimepath' which comes after $VIMRUNTIME, so that your settings overrule
    the default colors.  This way these colors will be used after the ":syntax
    reset" command.

    For Unix you can use the file ~/.vim/after/syntax/syncolor.vim.  Example:

    	if &background == "light"
    	  highlight comment ctermfg=darkgreen guifg=darkgreen
    	else
    	  highlight comment ctermfg=green guifg=green
    	endif

    								*E679*
    Do make sure this syncolor.vim script does not use a "syntax on", set the
    'background' option or uses a "colorscheme" command, because it results in an
    endless loop.

    Note that when a color scheme is used, there might be some confusion whether
    your defined colors are to be used or the colors from the scheme.  This
    depends on the color scheme file.  See |:colorscheme|.

    							*syntax_cmd*
    The "syntax_cmd" variable is set to one of these values when the
    syntax/syncolor.vim files are loaded:
       "on"		":syntax on" command.  Highlight colors are overruled but
    		links are kept
       "enable"	":syntax enable" command.  Only define colors for groups that
    		don't have highlighting yet.  Use ":syntax default".
       "reset"	":syntax reset" command or loading a color scheme.  Define all
    		the colors.
       "skip"	Don't define colors.  Used to skip the default settings when a
    		syncolor.vim file earlier in 'runtimepath' has already set
    		them.

    16. Highlighting tags					*tag-highlight*

    If you want to highlight all the tags in your file, you can use the following
    mappings.

    	<F11>	-- Generate tags.vim file, and highlight tags.
    	<F12>	-- Just highlight tags based on existing tags.vim file.

      :map <F11>  :sp tags<CR>:%s/^\([^	:]*:\)\=\([^	]*\).*/syntax keyword Tag \2/<CR>:wq! tags.vim<CR>/^<CR><F12>
      :map <F12>  :so tags.vim<CR>

    WARNING: The longer the tags file, the slower this will be, and the more
    memory Vim will consume.

    Only highlighting typedefs, unions and structs can be done too.  For this you
    must use Exuberant ctags (found at http://ctags.sf.net).

    Put these lines in your Makefile:

    # Make a highlight file for types.  Requires Exuberant ctags and awk
    types: types.vim
    types.vim: *.[ch]
    	ctags --c-kinds=gstu -o- *.[ch] |\
    		awk 'BEGIN{printf("syntax keyword Type\t")}\
    			{printf("%s ", $$1)}END{print ""}' > $@

    And put these lines in your .vimrc:

       " load the types.vim highlighting file, if it exists
       autocmd BufRead,BufNewFile *.[ch] let fname = expand('<afile>:p:h') . '/types.vim'
       autocmd BufRead,BufNewFile *.[ch] if filereadable(fname)
       autocmd BufRead,BufNewFile *.[ch]   exe 'so ' . fname
       autocmd BufRead,BufNewFile *.[ch] endif

    17. Window-local syntax				*:ownsyntax*

    Normally all windows on a buffer share the same syntax settings. It is
    possible, however, to set a particular window on a file to have its own
    private syntax setting. A possible example would be to edit LaTeX source
    with conventional highlighting in one window, while seeing the same source
    highlighted differently (so as to hide control sequences and indicate bold,
    italic etc regions) in another. The 'scrollbind' option is useful here.

    To set the current window to have the syntax "foo", separately from all other
    windows on the buffer:
       :ownsyntax foo
    						*w:current_syntax*
    This will set the "w:current_syntax" variable to "foo".  The value of
    "b:current_syntax" does not change.  This is implemented by saving and
    restoring "b:current_syntax", since the syntax files do set
    "b:current_syntax".  The value set by the syntax file is assigned to
    "w:current_syntax".
    Note: This resets the 'spell', 'spellcapcheck' and 'spellfile' options.

    Once a window has its own syntax, syntax commands executed from other windows
    on the same buffer (including :syntax clear) have no effect. Conversely,
    syntax commands executed from that window do not affect other windows on the
    same buffer.

    A window with its own syntax reverts to normal behavior when another buffer
    is loaded into that window or the file is reloaded.
    When splitting the window, the new window will use the original syntax.

    18. Color xterms				*xterm-color* *color-xterm*

    Most color xterms have only eight colors.  If you don't get colors with the
    default setup, it should work with these lines in your .vimrc:
       :if &term =~ "xterm"
       :  if has("terminfo")
       :	set t_Co=8
       :	set t_Sf=<Esc>[3%p1%dm
       :	set t_Sb=<Esc>[4%p1%dm
       :  else
       :	set t_Co=8
       :	set t_Sf=<Esc>[3%dm
       :	set t_Sb=<Esc>[4%dm
       :  endif
       :endif
    	[<Esc> is a real escape, type CTRL-V <Esc>]

    You might want to change the first "if" to match the name of your terminal,
    e.g. "dtterm" instead of "xterm".

    Note: Do these settings BEFORE doing ":syntax on".  Otherwise the colors may
    be wrong.
    							*xiterm* *rxvt*
    The above settings have been mentioned to work for xiterm and rxvt too.
    But for using 16 colors in an rxvt these should work with terminfo:
    	:set t_AB=<Esc>[%?%p1%{8}%<%t25;%p1%{40}%+%e5;%p1%{32}%+%;%dm
    	:set t_AF=<Esc>[%?%p1%{8}%<%t22;%p1%{30}%+%e1;%p1%{22}%+%;%dm

    							*colortest.vim*
    To test your color setup, a file has been included in the Vim distribution.
    To use it, execute this command:
       :runtime syntax/colortest.vim

    Some versions of xterm (and other terminals, like the Linux console) can
    output lighter foreground colors, even though the number of colors is defined
    at 8.  Therefore Vim sets the "cterm=bold" attribute for light foreground
    colors, when 't_Co' is 8.

    							*xfree-xterm*
    To get 16 colors or more, get the newest xterm version (which should be
    included with XFree86 3.3 and later).  You can also find the latest version
    at:
    	http://invisible-island.net/xterm/xterm.html
    Here is a good way to configure it.  This uses 88 colors and enables the
    termcap-query feature, which allows Vim to ask the xterm how many colors it
    supports.
    	./configure --disable-bold-color --enable-88-color --enable-tcap-query
    If you only get 8 colors, check the xterm compilation settings.
    (Also see |UTF8-xterm| for using this xterm with UTF-8 character encoding).

    This xterm should work with these lines in your .vimrc (for 16 colors):
       :if has("terminfo")
       :  set t_Co=16
       :  set t_AB=<Esc>[%?%p1%{8}%<%t%p1%{40}%+%e%p1%{92}%+%;%dm
       :  set t_AF=<Esc>[%?%p1%{8}%<%t%p1%{30}%+%e%p1%{82}%+%;%dm
       :else
       :  set t_Co=16
       :  set t_Sf=<Esc>[3%dm
       :  set t_Sb=<Esc>[4%dm
       :endif
    	[<Esc> is a real escape, type CTRL-V <Esc>]

    Without |+terminfo|, Vim will recognize these settings, and automatically
    translate cterm colors of 8 and above to "<Esc>[9%dm" and "<Esc>[10%dm".
    Colors above 16 are also translated automatically.

    For 256 colors this has been reported to work:

       :set t_AB=<Esc>[48;5;%dm
       :set t_AF=<Esc>[38;5;%dm

    Or just set the TERM environment variable to "xterm-color" or "xterm-16color"
    and try if that works.

    You probably want to use these X resources (in your ~/.Xdefaults file):
    	XTerm*color0:			#000000
    	XTerm*color1:			#c00000
    	XTerm*color2:			#008000
    	XTerm*color3:			#808000
    	XTerm*color4:			#0000c0
    	XTerm*color5:			#c000c0
    	XTerm*color6:			#008080
    	XTerm*color7:			#c0c0c0
    	XTerm*color8:			#808080
    	XTerm*color9:			#ff6060
    	XTerm*color10:			#00ff00
    	XTerm*color11:			#ffff00
    	XTerm*color12:			#8080ff
    	XTerm*color13:			#ff40ff
    	XTerm*color14:			#00ffff
    	XTerm*color15:			#ffffff
    	Xterm*cursorColor:		Black

    [Note: The cursorColor is required to work around a bug, which changes the
    cursor color to the color of the last drawn text.  This has been fixed by a
    newer version of xterm, but not everybody is using it yet.]

    To get these right away, reload the .Xdefaults file to the X Option database
    Manager (you only need to do this when you just changed the .Xdefaults file):
      xrdb -merge ~/.Xdefaults

    					*xterm-blink* *xterm-blinking-cursor*
    To make the cursor blink in an xterm, see tools/blink.c.  Or use Thomas
    Dickey's xterm above patchlevel 107 (see above for where to get it), with
    these resources:
    	XTerm*cursorBlink:	on
    	XTerm*cursorOnTime:	400
    	XTerm*cursorOffTime:	250
    	XTerm*cursorColor:	White

    							*hpterm-color*
    These settings work (more or less) for an hpterm, which only supports 8
    foreground colors:
       :if has("terminfo")
       :  set t_Co=8
       :  set t_Sf=<Esc>[&v%p1%dS
       :  set t_Sb=<Esc>[&v7S
       :else
       :  set t_Co=8
       :  set t_Sf=<Esc>[&v%dS
       :  set t_Sb=<Esc>[&v7S
       :endif
    	[<Esc> is a real escape, type CTRL-V <Esc>]

    						*Eterm* *enlightened-terminal*
    These settings have been reported to work for the Enlightened terminal
    emulator, or Eterm.  They might work for all xterm-like terminals that use the
    bold attribute to get bright colors.  Add an ":if" like above when needed.
           :set t_Co=16
           :set t_AF=^[[%?%p1%{8}%<%t3%p1%d%e%p1%{22}%+%d;1%;m
           :set t_AB=^[[%?%p1%{8}%<%t4%p1%d%e%p1%{32}%+%d;1%;m

    						*TTpro-telnet*
    These settings should work for TTpro telnet.  Tera Term Pro is a freeware /
    open-source program for MS-Windows.
    	set t_Co=16
    	set t_AB=^[[%?%p1%{8}%<%t%p1%{40}%+%e%p1%{32}%+5;%;%dm
    	set t_AF=^[[%?%p1%{8}%<%t%p1%{30}%+%e%p1%{22}%+1;%;%dm
    Also make sure TTpro's Setup / Window / Full Color is enabled, and make sure
    that Setup / Font / Enable Bold is NOT enabled.
    (info provided by John Love-Jensen <eljay@Adobe.COM>)

    19. When syntax is slow						*:syntime*

    This is aimed at authors of a syntax file.

    If your syntax causes redrawing to be slow, here are a few hints on making it
    faster.  To see slowness switch on some features that usually interfere, such
    as 'relativenumber' and |folding|.

    Note: this is only available when compiled with the |+profile| feature.
    You many need to build Vim with "huge" features.

    To find out what patterns are consuming most time, get an overview with this
    sequence:
    	:syntime on
    	[ redraw the text at least once with CTRL-L ]
    	:syntime report

    This will display a list of syntax patterns that were used, sorted by the time
    it took to match them against the text.

    :syntime on		Start measuring syntax times.  This will add some
    			overhead to compute the time spent on syntax pattern
    			matching.

    :syntime off		Stop measuring syntax times.

    :syntime clear		Set all the counters to zero, restart measuring.

    :syntime report		Show the syntax items used since ":syntime on" in the
    			current window.  Use a wider display to see more of
    			the output.

    			The list is sorted by total time. The columns are:
    			TOTAL		Total time in seconds spent on
    					matching this pattern.
    			COUNT		Number of times the pattern was used.
    			MATCH		Number of times the pattern actually
    					matched
    			SLOWEST		The longest time for one try.
    			AVERAGE		The average time for one try.
    			NAME		Name of the syntax item.  Note that
    					this is not unique.
    			PATTERN		The pattern being used.

    Pattern matching gets slow when it has to try many alternatives.  Try to
    include as much literal text as possible to reduce the number of ways a
    pattern does NOT match.

    When using the "\@<=" and "\@<!" items, add a maximum size to avoid trying at
    all positions in the current and previous line.  For example, if the item is
    literal text specify the size of that text (in bytes):

    "<\@<=span"	Matches "span" in "<span".  This tries matching with "<" in
    		many places.
    "<\@1<=span"	Matches the same, but only tries one byte before "span".

     vim:tw=78:sw=4:ts=8:noet:ft=help:norl:

Generated by vim2html on Mon, Mar 30, 2020 10:53:32 PM