diff --git a/runtime/syntax/tidy.vim b/runtime/syntax/tidy.vim
new file mode 100644
index 0000000..0651803
--- /dev/null
+++ b/runtime/syntax/tidy.vim
@@ -0,0 +1,153 @@
+" Vim syntax file
+" Filename:	tidy.vim
+" Language:	HMTL Tidy configuration file ( /etc/tidyrc ~/.tidyrc )
+" Maintainer:	Doug Kearns <djkea2@mugca.its.monash.edu.au>
+" URL:		http://mugca.its.monash.edu.au/~djkea2/vim/syntax/tidy.vim
+" Last Change:	2002 Oct 24
+
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+  syntax clear
+elseif exists("b:current_syntax")
+  finish
+endif
+
+if version < 600
+  set iskeyword=@,48-57,-
+else
+  setlocal iskeyword=@,48-57,-
+endif
+
+syn match	tidyComment		"^\s*//.*$" contains=tidyTodo
+syn match	tidyComment		"^\s*#.*$"  contains=tidyTodo
+syn keyword	tidyTodo		TODO NOTE FIXME XXX contained
+
+syn match	tidyAssignment		"^[a-z0-9-]\+:\s*.*$" contains=tidyOption,@tidyValue,tidyDelimiter
+syn match	tidyDelimiter		":" contained
+
+syn match	tidyNewTagAssignment	"^new-\l\+-tags:\s*.*$" contains=tidyNewTagOption,tidyNewTagDelimiter,tidyNewTagValue,tidyDelimiter
+syn match	tidyNewTagDelimiter	"," contained
+syn match	tidyNewTagValue		"\<\w\+\>" contained
+
+syn case ignore
+syn keyword	tidyBoolean		t[rue] f[alse] y[es] n[o] contained
+syn case match
+syn match	tidyDoctype		"\<omit\|auto\|strict\|loose\|transitional\>" contained
+" NOTE: use match rather than keyword here so that tidyEncoding raw does not always have precedence over tidyOption raw
+syn match	tidyEncoding		"\<\(ascii\|latin1\|raw\|utf8\|iso2022\|mac\|utf16le\|utf16be\|utf16\|win1252\|big5\|shiftjis\)\>" contained
+syn match	tidyNumber		"\<\d\+\>" contained
+syn match	tidyRepeat		"\<keep-first\|keep-last\>" contained
+syn region	tidyString		start=+"+ skip=+\\\\\|\\"+ end=+"+ contained oneline
+syn region	tidyString		start=+'+ skip=+\\\\\|\\'+ end=+'+ contained oneline
+syn cluster	tidyValue		contains=tidyBoolean,tidyDoctype,tidyEncoding,tidyNumber,tidyRepeat,tidyString
+
+syn match	tidyOption		"^accessibility-check"		contained
+syn match	tidyOption		"^add-xml-decl"			contained
+syn match	tidyOption		"^add-xml-pi"			contained
+syn match	tidyOption		"^add-xml-space"		contained
+syn match	tidyOption		"^alt-text"			contained
+syn match	tidyOption		"^ascii-chars"			contained
+syn match	tidyOption		"^assume-xml-procins"		contained
+syn match	tidyOption		"^bare"				contained
+syn match	tidyOption		"^break-before-br"		contained
+syn match	tidyOption		"^char-encoding"		contained
+syn match	tidyOption		"^clean"			contained
+syn match	tidyOption		"^css-prefix"			contained
+syn match	tidyOption		"^doctype"			contained
+syn match	tidyOption		"^drop-empty-paras"		contained
+syn match	tidyOption		"^drop-font-tags"		contained
+syn match	tidyOption		"^drop-proprietary-attributes"	contained
+syn match	tidyOption		"^enclose-block-text"		contained
+syn match	tidyOption		"^enclose-text"			contained
+syn match	tidyOption		"^error-file"			contained
+syn match	tidyOption		"^escape-cdata"			contained
+syn match	tidyOption		"^fix-backslash"		contained
+syn match	tidyOption		"^fix-bad-comments"		contained
+syn match	tidyOption		"^fix-uri"			contained
+syn match	tidyOption		"^force-output"			contained
+syn match	tidyOption		"^gnu-emacs"			contained
+syn match	tidyOption		"^hide-comments"		contained
+syn match	tidyOption		"^hide-endtags"			contained
+syn match	tidyOption		"^indent"			contained
+syn match	tidyOption		"^indent-attributes"		contained
+syn match	tidyOption		"^indent-cdata"			contained
+syn match	tidyOption		"^indent-spaces"		contained
+syn match	tidyOption		"^input-encoding"		contained
+syn match	tidyOption		"^input-xml"			contained
+syn match	tidyOption		"^join-classes"			contained
+syn match	tidyOption		"^join-styles"			contained
+syn match	tidyOption		"^keep-time"			contained
+syn match	tidyOption		"^language"			contained
+syn match	tidyOption		"^literal-attributes"		contained
+syn match	tidyOption		"^logical-emphasis"		contained
+syn match	tidyOption		"^lower-literals"		contained
+syn match	tidyOption		"^markup"			contained
+syn match	tidyOption		"^ncr"				contained
+syn match	tidyOption		"^numeric-entities"		contained
+syn match	tidyOption		"^output-bom"			contained
+syn match	tidyOption		"^output-encoding"		contained
+syn match	tidyOption		"^output-html"			contained
+syn match	tidyOption		"^output-xhtml"			contained
+syn match	tidyOption		"^output-xml"			contained
+syn match	tidyOption		"^quiet"			contained
+syn match	tidyOption		"^quote-ampersand"		contained
+syn match	tidyOption		"^quote-marks"			contained
+syn match	tidyOption		"^quote-nbsp"			contained
+syn match	tidyOption		"^raw"				contained
+syn match	tidyOption		"^repeated-attributes"		contained
+syn match	tidyOption		"^replace-color"		contained
+syn match	tidyOption		"^show-body-only"		contained
+syn match	tidyOption		"^show-errors"			contained
+syn match	tidyOption		"^show-warnings"		contained
+syn match	tidyOption		"^slide-style"			contained
+syn match	tidyOption		"^split"			contained
+syn match	tidyOption		"^tab-size"			contained
+syn match	tidyOption		"^tidy-mark"			contained
+syn match	tidyOption		"^uppercase-attributes"		contained
+syn match	tidyOption		"^uppercase-tags"		contained
+syn match	tidyOption		"^word-2000"			contained
+syn match	tidyOption		"^wrap"				contained
+syn match	tidyOption		"^wrap-asp"			contained
+syn match	tidyOption		"^wrap-attributes"		contained
+syn match	tidyOption		"^wrap-jste"			contained
+syn match	tidyOption		"^wrap-php"			contained
+syn match	tidyOption		"^wrap-script-literals"		contained
+syn match	tidyOption		"^wrap-sections"		contained
+syn match	tidyOption		"^write-back"			contained
+syn match	tidyNewTagOption	"^new-blocklevel-tags"		contained
+syn match	tidyNewTagOption	"^new-empty-tags"		contained
+syn match	tidyNewTagOption	"^new-inline-tags"		contained
+syn match	tidyNewTagOption	"^new-pre-tags"			contained
+
+" Define the default highlighting.
+" For version 5.7 and earlier: only when not done already
+" For version 5.8 and later: only when an item doesn't have highlighting yet
+if version >= 508 || !exists("did_tidy_syn_inits")
+  if version < 508
+    let did_tidy_syn_inits = 1
+    command -nargs=+ HiLink hi link <args>
+  else
+    command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink tidyBoolean		Boolean
+  HiLink tidyComment		Comment
+  HiLink tidyDelimiter		Special
+  HiLink tidyDoctype		Constant
+  HiLink tidyEncoding		Constant
+  HiLink tidyNewTagDelimiter	Special
+  HiLink tidyNewTagOption	Identifier
+  HiLink tidyNewTagValue	Constant
+  HiLink tidyNumber		Number
+  HiLink tidyOption		Identifier
+  HiLink tidyRepeat		Constant
+  HiLink tidyString		String
+  HiLink tidyTodo		Todo
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "tidy"
+
+" vim: ts=8