FILE: C:\Program Files\Git\usr\share\vim\vim91\syntax\dtd.vim

--
" Vim syntax file
" Language: DTD (Document Type Definition for XML)
" Maintainer: Christian Brabandt 
" Repository: https://github.com/chrisbra/vim-xml-ftplugin
" Previous Maintainer: Johannes Zellner 
" Author: Daniel Amyot 
" Last Changed:	Sept 24, 2019
" 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  highlighted using 'dtdFunction'.
"
" PROVIDES: @dtdTagHook
"
syn region dtdTag matchgroup=dtdFunction
    \ start=++ 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 +
endif

" if this is a html like comment highlight also
" the opening  as Comment.
syn region dtdComment		start=++ contains=dtdTodo,@Spell


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


" Start tags (keywords). This is contained in dtdFunction.
" Note that everything not contained here will be marked
" as error.
syn match dtdTagName contained +"
	\ matchgroup=NONE contains=dtdParamEntityPunct
    syn match  dtdParamEntityPunct contained "\."

    " declarations
    " syn region dtdParamEntityDecl oneline matchgroup=dtdParamEntityDPunct start=+" contains=dtdParamEntityDPunct
    syn match dtdParamEntityDecl +--