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Editing File: /usr/share/vim/vim80/syntax/dtd.vim

" Vim syntax file
" Language:	DTD (Document Type Definition for XML)
" Maintainer:	Johannes Zellner <johannes@zellner.org>
"		Author and previous maintainer:
"		Daniel Amyot <damyot@site.uottawa.ca>
" Last Change:	Tue, 27 Apr 2004 14:54:59 CEST
" Filenames:	*.dtd
"
" REFERENCES:
"   http://www.w3.org/TR/html40/
"   http://www.w3.org/TR/NOTE-html-970421
"
" TODO:
"   - improve synchronizing.

if exists("b:current_syntax")
    finish
endif
let s:dtd_cpo_save = &cpo
set cpo&vim

if !exists("dtd_ignore_case")
    " I prefer having the case takes into consideration.
    syn case match
else
    syn case ignore
endif

" the following line makes the opening <! and
" closing > highlighted using 'dtdFunction'.
"
" PROVIDES: @dtdTagHook
"
syn region dtdTag matchgroup=dtdFunction
    \ start=+<!+ end=+>+ matchgroup=NONE
    \ contains=dtdTag,dtdTagName,dtdError,dtdComment,dtdString,dtdAttrType,dtdAttrDef,dtdEnum,dtdParamEntityInst,dtdParamEntityDecl,dtdCard,@dtdTagHook

if !exists("dtd_no_tag_errors")
    " mark everything as an error which starts with a <!
    " and is not overridden later. If this is annoying,
    " it can be switched off by setting the variable
    " dtd_no_tag_errors.
    syn region dtdError contained start=+<!+lc=2 end=+>+
endif

" if this is a html like comment hightlight also
" the opening <! and the closing > as Comment.
syn region dtdComment		start=+<![ \t]*--+ end=+-->+ contains=dtdTodo,@Spell

" proper DTD comment
syn region dtdComment contained start=+--+ end=+--+ contains=dtdTodo,@Spell

" wildcards and operators
syn match  dtdCard contained "|"
syn match  dtdCard contained ","
" evenutally overridden by dtdEntity
syn match  dtdCard contained "&"
syn match  dtdCard contained "?"
syn match  dtdCard contained "\*"
syn match  dtdCard contained "+"

" ...and finally, special cases.
syn match  dtdCard      "ANY"
syn match  dtdCard      "EMPTY"

if !exists("dtd_no_param_entities")

" highlight parameter entity declarations
    " and instances. Note that the closing `;'
    " is optional.

" instances
    syn region dtdParamEntityInst oneline matchgroup=dtdParamEntityPunct
	\ start="%[-_a-zA-Z0-9.]\+"he=s+1,rs=s+1
	\ skip=+[-_a-zA-Z0-9.]+
	\ end=";\|\>"
	\ matchgroup=NONE contains=dtdParamEntityPunct
    syn match  dtdParamEntityPunct contained "\."

" declarations
    " syn region dtdParamEntityDecl oneline matchgroup=dtdParamEntityDPunct start=+<!ENTITY % +lc=8 skip=+[-_a-zA-Z0-9.]+ matchgroup=NONE end="\>" contains=dtdParamEntityDPunct
    syn match dtdParamEntityDecl +<!ENTITY % [-_a-zA-Z0-9.]*+lc=8 contains=dtdParamEntityDPunct
    syn match  dtdParamEntityDPunct contained "%\|\."

endif

" &entities; compare with xml
syn match   dtdEntity		      "&[^; \t]*;" contains=dtdEntityPunct
syn match   dtdEntityPunct  contained "[&.;]"

" Strings are between quotes
syn region dtdString    start=+"+ skip=+\\\\\|\\"+  end=+"+ contains=dtdAttrDef,dtdAttrType,dtdEnum,dtdParamEntityInst,dtdEntity,dtdCard
syn region dtdString    start=+'+ skip=+\\\\\|\\'+  end=+'+ contains=dtdAttrDef,dtdAttrType,dtdEnum,dtdParamEntityInst,dtdEntity,dtdCard

" Enumeration of elements or data between parenthesis
"
" PROVIDES: @dtdEnumHook
"
syn region dtdEnum matchgroup=dtdType start="(" end=")" matchgroup=NONE contains=dtdEnum,dtdParamEntityInst,dtdCard,@dtdEnumHook

"Attribute types
syn keyword dtdAttrType NMTOKEN  ENTITIES  NMTOKENS  ID  CDATA
syn keyword dtdAttrType IDREF  IDREFS
" ENTITY has to treated special for not overriding <!ENTITY
syn match   dtdAttrType +[^!]\<ENTITY+

"Attribute Definitions
syn match  dtdAttrDef   "#REQUIRED"
syn match  dtdAttrDef   "#IMPLIED"
syn match  dtdAttrDef   "#FIXED"

syn case match
" define some common keywords to mark TODO
" and important sections inside comments.
syn keyword dtdTodo contained TODO FIXME XXX

syn sync lines=250

" Define the default highlighting.
" Only when an item doesn't have highlighting yet

" The default highlighting.
hi def link dtdFunction		Function
hi def link dtdTag		Normal
hi def link dtdType		Type
hi def link dtdAttrType		dtdType
hi def link dtdAttrDef		dtdType
hi def link dtdConstant		Constant
hi def link dtdString		dtdConstant
hi def link dtdEnum		dtdConstant
hi def link dtdCard		dtdFunction

hi def link dtdEntity		Statement
hi def link dtdEntityPunct	dtdType
hi def link dtdParamEntityInst	dtdConstant
hi def link dtdParamEntityPunct	dtdType
hi def link dtdParamEntityDecl	dtdType
hi def link dtdParamEntityDPunct dtdComment

hi def link dtdComment		Comment
hi def link dtdTagName		Statement
hi def link dtdError		Error
hi def link dtdTodo		Todo

let &cpo = s:dtd_cpo_save
unlet s:dtd_cpo_save

let b:current_syntax = "dtd"

" vim: ts=8

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