diff --git a/runtime/syntax/sdl.vim b/runtime/syntax/sdl.vim
new file mode 100644
index 0000000..d0165e7
--- /dev/null
+++ b/runtime/syntax/sdl.vim
@@ -0,0 +1,167 @@
+" Vim syntax file
+" Language:	SDL
+" Maintainer:	Michael Piefel <piefel@informatik.hu-berlin.de>
+" Last Change:	2 May 2001
+
+" 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 !exists("sdl_2000")
+    syntax case ignore
+endif
+
+" A bunch of useful SDL keywords
+syn keyword sdlStatement	task else nextstate
+syn keyword sdlStatement	in out with from interface
+syn keyword sdlStatement	to via env and use
+syn keyword sdlStatement	process procedure block system service type
+syn keyword sdlStatement	endprocess endprocedure endblock endsystem
+syn keyword sdlStatement	package endpackage connection endconnection
+syn keyword sdlStatement	channel endchannel connect
+syn keyword sdlStatement	synonym dcl signal gate timer signallist signalset
+syn keyword sdlStatement	create output set reset call
+syn keyword sdlStatement	operators literals
+syn keyword sdlStatement	active alternative any as atleast constants
+syn keyword sdlStatement	default endalternative endmacro endoperator
+syn keyword sdlStatement	endselect endsubstructure external
+syn keyword sdlStatement	if then fi for import macro macrodefinition
+syn keyword sdlStatement	macroid mod nameclass nodelay not operator or
+syn keyword sdlStatement	parent provided referenced rem
+syn keyword sdlStatement	select spelling substructure xor
+syn keyword sdlNewState		state endstate
+syn keyword sdlInput		input start stop return none save priority
+syn keyword sdlConditional	decision enddecision join
+syn keyword sdlVirtual		virtual redefined finalized adding inherits
+syn keyword sdlExported		remote exported export
+
+if !exists("sdl_no_96")
+    syn keyword sdlStatement	all axioms constant endgenerator endrefinement endservice
+    syn keyword sdlStatement	error fpar generator literal map noequality ordering
+    syn keyword sdlStatement	refinement returns revealed reverse service signalroute
+    syn keyword sdlStatement	view viewed
+    syn keyword sdlExported	imported
+endif
+
+if exists("sdl_2000")
+    syn keyword sdlStatement	abstract aggregation association break choice composition
+    syn keyword sdlStatement	continue endmethod handle method
+    syn keyword sdlStatement	ordered private protected public
+    syn keyword sdlException	exceptionhandler endexceptionhandler onexception
+    syn keyword sdlException	catch new raise
+    " The same in uppercase
+    syn keyword sdlStatement	TASK ELSE NEXTSTATE
+    syn keyword sdlStatement	IN OUT WITH FROM INTERFACE
+    syn keyword sdlStatement	TO VIA ENV AND USE
+    syn keyword sdlStatement	PROCESS PROCEDURE BLOCK SYSTEM SERVICE TYPE
+    syn keyword sdlStatement	ENDPROCESS ENDPROCEDURE ENDBLOCK ENDSYSTEM
+    syn keyword sdlStatement	PACKAGE ENDPACKAGE CONNECTION ENDCONNECTION
+    syn keyword sdlStatement	CHANNEL ENDCHANNEL CONNECT
+    syn keyword sdlStatement	SYNONYM DCL SIGNAL GATE TIMER SIGNALLIST SIGNALSET
+    syn keyword sdlStatement	CREATE OUTPUT SET RESET CALL
+    syn keyword sdlStatement	OPERATORS LITERALS
+    syn keyword sdlStatement	ACTIVE ALTERNATIVE ANY AS ATLEAST CONSTANTS
+    syn keyword sdlStatement	DEFAULT ENDALTERNATIVE ENDMACRO ENDOPERATOR
+    syn keyword sdlStatement	ENDSELECT ENDSUBSTRUCTURE EXTERNAL
+    syn keyword sdlStatement	IF THEN FI FOR IMPORT MACRO MACRODEFINITION
+    syn keyword sdlStatement	MACROID MOD NAMECLASS NODELAY NOT OPERATOR OR
+    syn keyword sdlStatement	PARENT PROVIDED REFERENCED REM
+    syn keyword sdlStatement	SELECT SPELLING SUBSTRUCTURE XOR
+    syn keyword sdlNewState	STATE ENDSTATE
+    syn keyword sdlInput	INPUT START STOP RETURN NONE SAVE PRIORITY
+    syn keyword sdlConditional	DECISION ENDDECISION JOIN
+    syn keyword sdlVirtual	VIRTUAL REDEFINED FINALIZED ADDING INHERITS
+    syn keyword sdlExported	REMOTE EXPORTED EXPORT
+
+    syn keyword sdlStatement	ABSTRACT AGGREGATION ASSOCIATION BREAK CHOICE COMPOSITION
+    syn keyword sdlStatement	CONTINUE ENDMETHOD ENDOBJECT ENDVALUE HANDLE METHOD OBJECT
+    syn keyword sdlStatement	ORDERED PRIVATE PROTECTED PUBLIC
+    syn keyword sdlException	EXCEPTIONHANDLER ENDEXCEPTIONHANDLER ONEXCEPTION
+    syn keyword sdlException	CATCH NEW RAISE
+endif
+
+" String and Character contstants
+" Highlight special characters (those which have a backslash) differently
+syn match   sdlSpecial		contained "\\\d\d\d\|\\."
+syn region  sdlString		start=+"+  skip=+\\\\\|\\"+  end=+"+  contains=cSpecial
+syn region  sdlString		start=+'+  skip=+''+  end=+'+
+
+" No, this doesn't happen, I just wanted to scare you. SDL really allows all
+" these characters for identifiers; fortunately, keywords manage without them.
+" set iskeyword=@,48-57,_,192-214,216-246,248-255,-
+
+syn region sdlComment		start="/\*"  end="\*/"
+syn region sdlComment		start="comment"  end=";"
+syn region sdlComment		start="--" end="--\|$"
+syn match  sdlCommentError	"\*/"
+
+syn keyword sdlOperator		present
+syn keyword sdlType		integer real natural duration pid boolean time
+syn keyword sdlType		character charstring ia5string
+syn keyword sdlType		self now sender offspring
+syn keyword sdlStructure	asntype endasntype syntype endsyntype struct
+
+if !exists("sdl_no_96")
+    syn keyword sdlStructure	newtype endnewtype
+endif
+
+if exists("sdl_2000")
+    syn keyword sdlStructure	object endobject value endvalue
+    " The same in uppercase
+    syn keyword sdlStructure	OBJECT ENDOBJECT VALUE ENDVALUE
+    syn keyword sdlOperator	PRESENT
+    syn keyword sdlType		INTEGER NATURAL DURATION PID BOOLEAN TIME
+    syn keyword sdlType		CHARSTRING IA5STRING
+    syn keyword sdlType		SELF NOW SENDER OFFSPRING
+    syn keyword sdlStructure	ASNTYPE ENDASNTYPE SYNTYPE ENDSYNTYPE STRUCT
+endif
+
+" ASN.1 in SDL
+syn case match
+syn keyword sdlType		SET OF BOOLEAN INTEGER REAL BIT OCTET
+syn keyword sdlType		SEQUENCE CHOICE
+syn keyword sdlType		STRING OBJECT IDENTIFIER NULL
+
+syn sync ccomment sdlComment
+
+" 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_sdl_syn_inits")
+    if version < 508
+	let did_sdl_syn_inits = 1
+	command -nargs=+ HiLink hi link <args>
+	command -nargs=+ Hi     hi <args>
+    else
+	command -nargs=+ HiLink hi def link <args>
+	command -nargs=+ Hi     hi def <args>
+    endif
+
+    HiLink  sdlException	Label
+    HiLink  sdlConditional	sdlStatement
+    HiLink  sdlVirtual		sdlStatement
+    HiLink  sdlExported		sdlFlag
+    HiLink  sdlCommentError	sdlError
+    HiLink  sdlOperator		Operator
+    HiLink  sdlStructure	sdlType
+    Hi	    sdlStatement	term=bold ctermfg=4 guifg=Blue
+    Hi	    sdlFlag		term=bold ctermfg=4 guifg=Blue gui=italic
+    Hi	    sdlNewState		term=italic ctermfg=2 guifg=Magenta gui=underline
+    Hi	    sdlInput		term=bold guifg=Red
+    HiLink  sdlType		Type
+    HiLink  sdlString		String
+    HiLink  sdlComment		Comment
+    HiLink  sdlSpecial		Special
+    HiLink  sdlError		Error
+
+    delcommand HiLink
+    delcommand Hi
+endif
+
+let b:current_syntax = "sdl"
+
+" vim: ts=8