diff --git a/runtime/syntax/asciidoc.vim b/runtime/syntax/asciidoc.vim
new file mode 100644
index 0000000..1303db7
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+++ b/runtime/syntax/asciidoc.vim
@@ -0,0 +1,183 @@
+" Vim syntax file
+" Language:     AsciiDoc
+" Author:       Stuart Rackham <srackham@gmail.com> (inspired by Felix
+"               Obenhuber's original asciidoc.vim script).
+" URL:          http://asciidoc.org/
+" Licence:      GPL (http://www.gnu.org)
+" Remarks:      Vim 6 or greater
+" Limitations:
+" 
+" - Nested quoted text formatting is highlighted according to the outer
+"   format.
+" - If a closing Example Block delimiter may be mistaken for a title
+"   underline. A workaround is to insert a blank line before the closing
+"   delimiter.
+" - Lines within a paragraph starting with equals characters are
+"   highlighted as single-line titles.
+" - Lines within a paragraph beginning with a period are highlighted as
+"   block titles.
+
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syn clear
+syn sync fromstart
+syn sync linebreaks=100
+
+" Run :help syn-priority to review syntax matching priority.
+syn keyword asciidocToDo TODO FIXME CHECK TEST XXX ZZZ DEPRECATED
+syn match asciidocBackslash /\\/
+syn region asciidocIdMarker start=/^\$Id:\s/ end=/\s\$$/
+syn match asciidocCallout /\\\@<!<\d\{1,2}>/
+syn match asciidocOpenBlockDelimiter /^--$/
+syn match asciidocLineBreak /[ \t]+$/ containedin=asciidocList
+syn match asciidocRuler /^'\{3,}$/
+syn match asciidocPagebreak /^<\{3,}$/
+syn match asciidocEntityRef /\\\@<!&[#a-zA-Z]\S\{-};/
+syn region asciidocLiteralParagraph start=/\(\%^\|\_^\s*\n\)\@<=\s\+\S\+/ end=/\(^\(+\|--\)\?\s*$\)\@=/ contains=asciidocToDo
+syn match asciidocURL /\\\@<!\<\(http\|https\|ftp\|file\|irc\):\/\/[^| \t]*\(\w\|\/\)/
+syn match asciidocEmail /[\\.:]\@<!\(\<\|<\)\w\(\w\|[.-]\)*@\(\w\|[.-]\)*\w>\?[0-9A-Za-z_]\@!/
+syn match asciidocAttributeRef /\\\@<!{\w\(\w\|[-,+]\)*\([=!@#$%?:].*\)\?}/
+
+" As a damage control measure quoted patterns always terminate at a blank
+" line (see 'Limitations' above).
+syn match asciidocQuotedAttributeList /\\\@<!\[[a-zA-Z0-9_-][a-zA-Z0-9 _-]*\][+_'`#*]\@=/
+syn match asciidocQuotedSubscript /\\\@<!\~\S\_.\{-}\(\~\|\n\s*\n\)/ contains=asciidocEntityRef
+syn match asciidocQuotedSuperscript /\\\@<!\^\S\_.\{-}\(\^\|\n\s*\n\)/ contains=asciidocEntityRef
+
+syn match asciidocQuotedMonospaced /\(^\|[| \t([.,=\]]\)\@<=+\([+ \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\(+\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+syn match asciidocQuotedMonospaced2 /\(^\|[| \t([.,=\]]\)\@<=`\([` \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\(`\([| \t)[\],.?!;:=]\|$\)\@=\)/
+syn match asciidocQuotedUnconstrainedMonospaced /[\\+]\@<!++\S\_.\{-}\(++\|\n\s*\n\)/ contains=asciidocEntityRef
+
+syn match asciidocQuotedEmphasized /\(^\|[| \t([.,=\]]\)\@<=_\([_ \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\(_\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+syn match asciidocQuotedEmphasized2 /\(^\|[| \t([.,=\]]\)\@<='\([' \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\('\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+syn match asciidocQuotedUnconstrainedEmphasized /\\\@<!__\S\_.\{-}\(__\|\n\s*\n\)/ contains=asciidocEntityRef
+
+syn match asciidocQuotedBold /\(^\|[| \t([.,=\]]\)\@<=\*\([* \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\(\*\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+syn match asciidocQuotedUnconstrainedBold /\\\@<!\*\*\S\_.\{-}\(\*\*\|\n\s*\n\)/ contains=asciidocEntityRef
+
+" Don't allow ` in single quoted (a kludge to stop confusion with `monospaced`).
+syn match asciidocQuotedSingleQuoted /\(^\|[| \t([.,=\]]\)\@<=`\([` \n\t]\)\@!\([^`]\|\n\(\s*\n\)\@!\)\{-}[^` \t]\('\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+
+syn match asciidocQuotedDoubleQuoted /\(^\|[| \t([.,=\]]\)\@<=``\([` \n\t]\)\@!\(.\|\n\(\s*\n\)\@!\)\{-}\S\(''\([| \t)[\],.?!;:=]\|$\)\@=\)/ contains=asciidocEntityRef
+
+syn match asciidocDoubleDollarPassthrough /\\\@<!\(^\|[^0-9a-zA-Z$]\)\@<=\$\$..\{-}\(\$\$\([^0-9a-zA-Z$]\|$\)\@=\|^$\)/
+syn match asciidocTriplePlusPassthrough /\\\@<!\(^\|[^0-9a-zA-Z$]\)\@<=+++..\{-}\(+++\([^0-9a-zA-Z$]\|$\)\@=\|^$\)/
+
+syn match asciidocAdmonition /^\u\{3,15}:\(\s\+.*\)\@=/
+
+syn region asciidocTable_OLD start=/^\([`.']\d*[-~_]*\)\+[-~_]\+\d*$/ end=/^$/
+syn match asciidocBlockTitle /^\.[^. \t].*[^-~_]$/ contains=asciidocQuoted.*,asciidocAttributeRef
+syn match asciidocTitleUnderline /[-=~^+]\{2,}$/ transparent contained contains=NONE
+syn match asciidocOneLineTitle /^=\{1,5}\s\+\S.*$/ contains=asciidocQuoted.*,asciidocMacroAttributes,asciidocAttributeRef,asciidocEntityRef,asciidocEmail,asciidocURL,asciidocBackslash
+syn match asciidocTwoLineTitle /^[^. +/].*[^.]\n[-=~^+]\{3,}$/ contains=asciidocQuoted.*,asciidocMacroAttributes,asciidocAttributeRef,asciidocEntityRef,asciidocEmail,asciidocURL,asciidocBackslash,asciidocTitleUnderline
+
+syn match asciidocAttributeList /^\[[^[ \t].*\]$/
+syn match asciidocQuoteBlockDelimiter /^_\{4,}$/
+syn match asciidocExampleBlockDelimiter /^=\{4,}$/
+syn match asciidocSidebarDelimiter /^*\{4,}$/
+
+" See http://vimdoc.sourceforge.net/htmldoc/usr_44.html for excluding region
+" contents from highlighting.
+syn match asciidocTablePrefix /\(\S\@<!\(\([0-9.]\+\)\([*+]\)\)\?\([<\^>.]\{,3}\)\?\([a-z]\)\?\)\?|/ containedin=asciidocTableBlock contained
+syn region asciidocTableBlock matchgroup=asciidocTableDelimiter start=/^|=\{3,}$/ end=/^|=\{3,}$/ keepend contains=ALL
+syn match asciidocTablePrefix /\(\S\@<!\(\([0-9.]\+\)\([*+]\)\)\?\([<\^>.]\{,3}\)\?\([a-z]\)\?\)\?!/ containedin=asciidocTableBlock contained
+syn region asciidocTableBlock2 matchgroup=asciidocTableDelimiter2 start=/^!=\{3,}$/ end=/^!=\{3,}$/ keepend contains=ALL
+
+syn match asciidocListContinuation /^+$/
+syn region asciidocLiteralBlock start=/^\.\{4,}$/ end=/^\.\{4,}$/ contains=asciidocCallout,asciidocToDo keepend
+syn region asciidocListingBlock start=/^-\{4,}$/ end=/^-\{4,}$/ contains=asciidocCallout,asciidocToDo keepend
+syn region asciidocCommentBlock start="^/\{4,}$" end="^/\{4,}$" contains=asciidocToDo
+syn region asciidocPassthroughBlock start="^+\{4,}$" end="^+\{4,}$"
+
+" Allowing leading \w characters in the filter delimiter is to accomodate
+" the pre version 8.2.7 syntax and may be removed in future releases.
+syn region asciidocFilterBlock start=/^\w*\~\{4,}$/ end=/^\w*\~\{4,}$/
+
+syn region asciidocMacroAttributes matchgroup=asciidocRefMacro start=/\\\@<!<<"\{-}\(\w\|-\|_\|:\|\.\)\+"\?,\?/ end=/\(>>\)\|^$/ contains=asciidocQuoted.* keepend
+syn region asciidocMacroAttributes matchgroup=asciidocAnchorMacro start=/\\\@<!\[\{2}\(\w\|-\|_\|:\|\.\)\+,\?/ end=/\]\{2}/ keepend
+syn region asciidocMacroAttributes matchgroup=asciidocAnchorMacro start=/\\\@<!\[\{3}\(\w\|-\|_\|:\|\.\)\+/ end=/\]\{3}/ keepend
+syn region asciidocMacroAttributes matchgroup=asciidocMacro start=/[\\0-9a-zA-Z]\@<!\w\(\w\|-\)*:\S\{-}\[/ skip=/\\\]/ end=/\]\|^$/ contains=asciidocQuoted.*,asciidocAttributeRef,asciidocEntityRef keepend
+" Highlight macro that starts with an attribute reference (a common idiom).
+syn region asciidocMacroAttributes matchgroup=asciidocMacro start=/\(\\\@<!{\w\(\w\|[-,+]\)*\([=!@#$%?:].*\)\?}\)\@<=\S\{-}\[/ skip=/\\\]/ end=/\]\|^$/ contains=asciidocQuoted.*,asciidocAttributeRef keepend
+syn region asciidocMacroAttributes matchgroup=asciidocIndexTerm start=/\\\@<!(\{2,3}/ end=/)\{2,3}/ contains=asciidocQuoted.*,asciidocAttributeRef keepend
+
+syn match asciidocCommentLine "^//\([^/].*\|\)$" contains=asciidocToDo
+
+syn region asciidocAttributeEntry start=/^:\w/ end=/:\(\s\|$\)/ oneline
+
+" Lists.
+syn match asciidocListBullet /^\s*\zs\(-\|\*\{1,5}\)\ze\s/
+syn match asciidocListNumber /^\s*\zs\(\(\d\+\.\)\|\.\{1,5}\|\(\a\.\)\|\([ivxIVX]\+)\)\)\ze\s\+/
+syn region asciidocListLabel start=/^\s*/ end=/\(:\{2,4}\|;;\)$/ oneline contains=asciidocQuoted.*,asciidocMacroAttributes,asciidocAttributeRef,asciidocEntityRef,asciidocEmail,asciidocURL,asciidocBackslash,asciidocToDo keepend
+" DEPRECATED: Horizontal label.
+syn region asciidocHLabel start=/^\s*/ end=/\(::\|;;\)\(\s\+\|\\$\)/ oneline contains=asciidocQuoted.*,asciidocMacroAttributes keepend
+" Starts with any of the above.
+syn region asciidocList start=/^\s*\(-\|\*\{1,5}\)\s/ start=/^\s*\(\(\d\+\.\)\|\.\{1,5}\|\(\a\.\)\|\([ivxIVX]\+)\)\)\s\+/ start=/.\+\(:\{2,4}\|;;\)$/ end=/\(^[=*]\{4,}$\)\@=/ end=/\(^\(+\|--\)\?\s*$\)\@=/ contains=asciidocList.\+,asciidocQuoted.*,asciidocMacroAttributes,asciidocAttributeRef,asciidocEntityRef,asciidocEmail,asciidocURL,asciidocBackslash,asciidocCommentLine,asciidocAttributeList,asciidocToDo
+
+hi def link asciidocAdmonition Special
+hi def link asciidocAnchorMacro Macro
+hi def link asciidocAttributeEntry Special
+hi def link asciidocAttributeList Special
+hi def link asciidocAttributeMacro Macro
+hi def link asciidocAttributeRef Special
+hi def link asciidocBackslash Special
+hi def link asciidocBlockTitle Title
+hi def link asciidocCallout Label
+hi def link asciidocCommentBlock Comment
+hi def link asciidocCommentLine Comment
+hi def link asciidocDoubleDollarPassthrough Special
+hi def link asciidocEmail Macro
+hi def link asciidocEntityRef Special
+hi def link asciidocExampleBlockDelimiter Type
+hi def link asciidocFilterBlock Type
+hi def link asciidocHLabel Label
+hi def link asciidocIdMarker Special
+hi def link asciidocIndexTerm Macro
+hi def link asciidocLineBreak Special
+hi def link asciidocOpenBlockDelimiter Label
+hi def link asciidocListBullet Label
+hi def link asciidocListContinuation Label
+hi def link asciidocListingBlock Identifier
+hi def link asciidocListLabel Label
+hi def link asciidocListNumber Label
+hi def link asciidocLiteralBlock Identifier
+hi def link asciidocLiteralParagraph Identifier
+hi def link asciidocMacroAttributes Label
+hi def link asciidocMacro Macro
+hi def link asciidocOneLineTitle Title
+hi def link asciidocPagebreak Type
+hi def link asciidocPassthroughBlock Identifier
+hi def link asciidocQuoteBlockDelimiter Type
+hi def link asciidocQuotedAttributeList Special
+hi def link asciidocQuotedBold Special
+hi def link asciidocQuotedDoubleQuoted Label
+hi def link asciidocQuotedEmphasized2 Type
+hi def link asciidocQuotedEmphasized Type
+hi def link asciidocQuotedMonospaced2 Identifier
+hi def link asciidocQuotedMonospaced Identifier
+hi def link asciidocQuotedSingleQuoted Label
+hi def link asciidocQuotedSubscript Type
+hi def link asciidocQuotedSuperscript Type
+hi def link asciidocQuotedUnconstrainedBold Special
+hi def link asciidocQuotedUnconstrainedEmphasized Type
+hi def link asciidocQuotedUnconstrainedMonospaced Identifier
+hi def link asciidocRefMacro Macro
+hi def link asciidocRuler Type
+hi def link asciidocSidebarDelimiter Type
+hi def link asciidocTableBlock2 NONE
+hi def link asciidocTableBlock NONE
+hi def link asciidocTableDelimiter2 Label
+hi def link asciidocTableDelimiter Label
+hi def link asciidocTable_OLD Type
+hi def link asciidocTablePrefix2 Label
+hi def link asciidocTablePrefix Label
+hi def link asciidocToDo Todo
+hi def link asciidocTriplePlusPassthrough Special
+hi def link asciidocTwoLineTitle Title
+hi def link asciidocURL Macro
+let b:current_syntax = "asciidoc"
+
+" vim: wrap et sw=2 sts=2: