new file mode 100644
--- /dev/null
+++ b/runtime/syntax/logtalk.vim
@@ -0,0 +1,428 @@
+" Vim syntax file
+"
+" Language:	Logtalk
+" Maintainer:	Paulo Moura <pmoura@logtalk.org>
+" Last Change:	2004 May 16
+
+
+" Quit when a syntax file was already loaded:
+
+if version < 600
+	syntax clear
+elseif exists("b:current_syntax")
+	finish
+endif
+
+
+" Logtalk is case sensitive:
+
+syn case match
+
+
+" Logtalk variables
+
+syn match   logtalkVariable		"\<\(\u\|_\)\(\w\)*\>"
+
+
+" Logtalk clause functor
+
+syn match	logtalkOperator		":-"
+
+
+" Logtalk quoted atoms and strings
+
+syn region	logtalkString		start=+"+	skip=+\\"+	end=+"+
+syn region	logtalkAtom		start=+'+	skip=+\\'+	end=+'+
+
+
+" Logtalk message sending operators
+
+syn match	logtalkOperator		"::"
+syn match	logtalkOperator		"\^\^"
+
+
+" Logtalk external call
+
+syn region	logtalkExtCall		matchgroup=logtalkExtCallTag		start="{"		matchgroup=logtalkExtCallTag		end="}"		contains=ALL
+
+
+" Logtalk opening entity directives
+
+syn region	logtalkOpenEntityDir	matchgroup=logtalkOpenEntityDirTag	start=":- object("	matchgroup=logtalkOpenEntityDirTag	end=")\."	contains=ALL
+syn region	logtalkOpenEntityDir	matchgroup=logtalkOpenEntityDirTag	start=":- protocol("	matchgroup=logtalkOpenEntityDirTag	end=")\."	contains=ALL
+syn region	logtalkOpenEntityDir	matchgroup=logtalkOpenEntityDirTag	start=":- category("	matchgroup=logtalkOpenEntityDirTag	end=")\."	contains=ALL
+
+
+" Logtalk closing entity directives
+
+syn match	logtalkCloseEntityDir	":- end_object\."
+syn match	logtalkCloseEntityDir	":- end_protocol\."
+syn match	logtalkCloseEntityDir	":- end_category\."
+
+
+" Logtalk entity relations
+
+syn region	logtalkEntityRel	matchgroup=logtalkEntityRelTag	start="instantiates("	matchgroup=logtalkEntityRelTag	end=")"		contains=logtalkEntity		contained
+syn region	logtalkEntityRel	matchgroup=logtalkEntityRelTag	start="specializes("	matchgroup=logtalkEntityRelTag	end=")"		contains=logtalkEntity		contained
+syn region	logtalkEntityRel	matchgroup=logtalkEntityRelTag	start="extends("	matchgroup=logtalkEntityRelTag	end=")"		contains=logtalkEntity		contained
+syn region	logtalkEntityRel	matchgroup=logtalkEntityRelTag	start="imports("	matchgroup=logtalkEntityRelTag	end=")"		contains=logtalkEntity		contained
+syn region	logtalkEntityRel	matchgroup=logtalkEntityRelTag	start="implements("	matchgroup=logtalkEntityRelTag	end=")"		contains=logtalkEntity		contained
+
+
+" Logtalk directives
+
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- initialization("	matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- info("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- mode("		matchgroup=logtalkDirTag	end=")\."	contains=logtalkOperator,logtalkAtom
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- dynamic("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn match	logtalkDirTag		":- dynamic\."
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- discontiguous("	matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- public("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- protected("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- private("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- metapredicate("	matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- op("			matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- calls("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+syn region	logtalkDir		matchgroup=logtalkDirTag	start=":- uses("		matchgroup=logtalkDirTag	end=")\."	contains=ALL
+
+
+" Logtalk built-in predicates
+
+syn match	logtalkBuiltIn		"\<current_object\ze("
+syn match	logtalkBuiltIn		"\<current_protocol\ze("
+syn match	logtalkBuiltIn		"\<current_category\ze("
+
+syn match	logtalkBuiltIn		"\<create_object\ze("
+syn match	logtalkBuiltIn		"\<create_protocol\ze("
+syn match	logtalkBuiltIn		"\<create_category\ze("
+
+syn match	logtalkBuiltIn		"\<object_property\ze("
+syn match	logtalkBuiltIn		"\<protocol_property\ze("
+syn match	logtalkBuiltIn		"\<category_property\ze("
+
+syn match	logtalkBuiltIn		"\<abolish_object\ze("
+syn match	logtalkBuiltIn		"\<abolish_protocol\ze("
+syn match	logtalkBuiltIn		"\<abolish_category\ze("
+
+syn match	logtalkBuiltIn		"\<extends_object\ze("
+syn match	logtalkBuiltIn		"\<extends_protocol\ze("
+syn match	logtalkBuiltIn		"\<implements_protocol\ze("
+syn match	logtalkBuiltIn		"\<instantiates_class\ze("
+syn match	logtalkBuiltIn		"\<specializes_class\ze("
+syn match	logtalkBuiltIn		"\<imports_category\ze("
+
+syn match	logtalkBuiltIn		"\<abolish_events\ze("
+syn match	logtalkBuiltIn		"\<current_event\ze("
+syn match	logtalkBuiltIn		"\<define_events\ze("
+
+syn match	logtalkBuiltIn		"\<current_logtalk_flag\ze("
+syn match	logtalkBuiltIn		"\<set_logtalk_flag\ze("
+
+syn match	logtalkBuiltIn		"\<logtalk_compile\ze("
+syn match	logtalkBuiltIn		"\<logtalk_load\ze("
+
+syn match	logtalkBuiltIn		"\<forall\ze("
+syn match	logtalkBuiltIn		"\<retractall\ze("
+
+
+" Logtalk built-in methods
+
+syn match	logtalkBuiltInMethod	"\<parameter\ze("
+syn match	logtalkBuiltInMethod	"\<self\ze("
+syn match	logtalkBuiltInMethod	"\<sender\ze("
+syn match	logtalkBuiltInMethod	"\<this\ze("
+
+syn match	logtalkBuiltInMethod	"\<current_predicate\ze("
+syn match	logtalkBuiltInMethod	"\<predicate_property\ze("
+
+syn match	logtalkBuiltInMethod	"\<abolish\ze("
+syn match	logtalkBuiltInMethod	"\<asserta\ze("
+syn match	logtalkBuiltInMethod	"\<assertz\ze("
+syn match	logtalkBuiltInMethod	"\<clause\ze("
+syn match	logtalkBuiltInMethod	"\<retract\ze("
+syn match	logtalkBuiltInMethod	"\<retractall\ze("
+
+syn match	logtalkBuiltInMethod	"\<bagof\ze("
+syn match	logtalkBuiltInMethod	"\<findall\ze("
+syn match	logtalkBuiltInMethod	"\<forall\ze("
+syn match	logtalkBuiltInMethod	"\<setof\ze("
+
+syn match	logtalkBuiltInMethod	"\<before\ze("
+syn match	logtalkBuiltInMethod	"\<after\ze("
+
+syn match	logtalkBuiltInMethod	"\<phrase\ze("
+
+
+" Mode operators
+
+syn match	logtalkOperator		"?"
+syn match	logtalkOperator		"@"
+
+
+" Control constructs
+
+syn match	logtalkKeyword		"\<true\>"
+syn match	logtalkKeyword		"\<fail\>"
+syn match	logtalkKeyword		"\<call\ze("
+syn match	logtalkOperator		"!"
+syn match	logtalkOperator		","
+syn match	logtalkOperator		";"
+syn match	logtalkOperator		"-->"
+syn match	logtalkOperator		"->"
+syn match	logtalkKeyword		"\<catch\ze("
+syn match	logtalkKeyword		"\<throw\ze("
+
+
+" Term unification
+
+syn match	logtalkOperator		"="
+syn match	logtalkKeyword		"\<unify_with_occurs_check\ze("
+syn match	logtalkOperator		"\\="
+
+
+" Term testing
+
+syn match	logtalkKeyword		"\<var\ze("
+syn match	logtalkKeyword		"\<atom\ze("
+syn match	logtalkKeyword		"\<integer\ze("
+syn match	logtalkKeyword		"\<float\ze("
+syn match	logtalkKeyword		"\<atomic\ze("
+syn match	logtalkKeyword		"\<compound\ze("
+syn match	logtalkKeyword		"\<nonvar\ze("
+syn match	logtalkKeyword		"\<number\ze("
+
+
+" Term comparison
+
+syn match	logtalkOperator		"@=<"
+syn match	logtalkOperator		"=="
+syn match	logtalkOperator		"\\=="
+syn match	logtalkOperator		"@<"
+syn match	logtalkOperator		"@>"
+syn match	logtalkOperator		"@>="
+
+
+" Term creation and decomposition
+
+syn match	logtalkKeyword		"\<functor\ze("
+syn match	logtalkKeyword		"\<arg\ze("
+syn match	logtalkOperator		"=\.\."
+syn match	logtalkKeyword		"\<copy_term\ze("
+
+
+" Arithemtic evaluation
+
+syn keyword	logtalkOperator		is
+
+
+" Arithemtic comparison
+
+syn match	logtalkOperator		"=:="
+syn match	logtalkOperator		"=\\="
+syn match	logtalkOperator		"<"
+syn match	logtalkOperator		"=<"
+syn match	logtalkOperator		">"
+syn match	logtalkOperator		">="
+
+
+" Stream selection and control
+
+syn match	logtalkKeyword		"\<current_input\ze("
+syn match	logtalkKeyword		"\<current_output\ze("
+syn match	logtalkKeyword		"\<set_input\ze("
+syn match	logtalkKeyword		"\<set_output\ze("
+syn match	logtalkKeyword		"\<open\ze("
+syn match	logtalkKeyword		"\<close\ze("
+syn match	logtalkKeyword		"\<flush_output\ze("
+syn match	logtalkKeyword		"\<flush_output\>"
+syn match	logtalkKeyword		"\<stream_property\ze("
+syn match	logtalkKeyword		"\<at_end_of_stream\ze("
+syn match	logtalkKeyword		"\<at_end_of_stream\>"
+syn match	logtalkKeyword		"\<set_stream_position\ze("
+
+
+" Character input/output
+
+syn match	logtalkKeyword		"\<get_char\ze("
+syn match	logtalkKeyword		"\<get_code\ze("
+syn match	logtalkKeyword		"\<peek_char\ze("
+syn match	logtalkKeyword		"\<peek_code\ze("
+syn match	logtalkKeyword		"\<put_char\ze("
+syn match	logtalkKeyword		"\<put_code\ze("
+syn match	logtalkKeyword		"\<nl\ze("
+syn match	logtalkKeyword		"\<nl\>"
+
+
+" Byte input/output
+
+syn match	logtalkKeyword		"\<get_byte\ze("
+syn match	logtalkKeyword		"\<peek_byte\ze("
+syn match	logtalkKeyword		"\<put_byte\ze("
+
+
+" Term input/output
+
+syn match	logtalkKeyword		"\<read_term\ze("
+syn match	logtalkKeyword		"\<read\ze("
+syn match	logtalkKeyword		"\<write_term\ze("
+syn match	logtalkKeyword		"\<write\ze("
+syn match	logtalkKeyword		"\<writeq\ze("
+syn match	logtalkKeyword		"\<write_canonical\ze("
+syn match	logtalkKeyword		"\<op\ze("
+syn match	logtalkKeyword		"\<current_op\ze("
+syn match	logtalkKeyword		"\<char_conversion\ze("
+syn match	logtalkKeyword		"\<current_char_conversion\ze("
+
+
+" Logic and control
+
+syn match	logtalkOperator		"\\+"
+syn match	logtalkKeyword		"\<once\ze("
+syn match	logtalkKeyword		"\<repeat\>"
+
+
+" Atomic term processing
+
+syn match	logtalkKeyword		"\<atom_length\ze("
+syn match	logtalkKeyword		"\<atom_concat\ze("
+syn match	logtalkKeyword		"\<sub_atom\ze("
+syn match	logtalkKeyword		"\<atom_chars\ze("
+syn match	logtalkKeyword		"\<atom_codes\ze("
+syn match	logtalkKeyword		"\<char_code\ze("
+syn match	logtalkKeyword		"\<number_chars\ze("
+syn match	logtalkKeyword		"\<number_codes\ze("
+
+
+" Implementation defined hooks functions
+
+syn match	logtalkKeyword		"\<set_prolog_flag\ze("
+syn match	logtalkKeyword		"\<current_prolog_flag\ze("
+syn match	logtalkKeyword		"\<halt\ze("
+syn match	logtalkKeyword		"\<halt\>"
+
+
+" Evaluable functors
+
+syn match	logtalkOperator		"+"
+syn match	logtalkOperator		"-"
+syn match	logtalkOperator		"\*"
+syn match	logtalkOperator		"//"
+syn match	logtalkOperator		"/"
+syn match	logtalkKeyword		"\<rem(?=[(])"
+syn match	logtalkKeyword		"\<rem\>"
+syn match	logtalkKeyword		"\<mod\ze("
+syn match	logtalkKeyword		"\<mod\>"
+syn match	logtalkKeyword		"\<abs\ze("
+syn match	logtalkKeyword		"\<sign\ze("
+syn match	logtalkKeyword		"\<float_integer_part\ze("
+syn match	logtalkKeyword		"\<float_fractional_part\ze("
+syn match	logtalkKeyword		"\<float\ze("
+syn match	logtalkKeyword		"\<floor\ze("
+syn match	logtalkKeyword		"\<truncate\ze("
+syn match	logtalkKeyword		"\<round\ze("
+syn match	logtalkKeyword		"\<ceiling\ze("
+
+
+" Other arithemtic functors
+
+syn match	logtalkOperator		"\*\*"
+syn match	logtalkKeyword		"\<sin\ze("
+syn match	logtalkKeyword		"\<cos\ze("
+syn match	logtalkKeyword		"\<atan\ze("
+syn match	logtalkKeyword		"\<exp\ze("
+syn match	logtalkKeyword		"\<log\ze("
+syn match	logtalkKeyword		"\<sqrt\ze("
+
+
+" Bitwise functors
+
+syn match	logtalkOperator		">>"
+syn match	logtalkOperator		"<<"
+syn match	logtalkOperator		"/\\"
+syn match	logtalkOperator		"\\/"
+syn match	logtalkOperator		"\\"
+
+
+" Logtalk end-of-clause
+
+syn match	logtalkOperator		"\."
+
+
+" Logtalk list operator
+
+syn match	logtalkOperator		"|"
+
+
+" Logtalk comments
+
+syn region	logtalkBlockComment	start="/\*"	end="\*/"
+syn match	logtalkLineComment	"%.*"
+
+
+" Logtalk numbers
+
+syn match	logtalkNumber		"\<[0-9]\+\>"
+syn match	logtalkNumber		"\<[0-9]\+\.[0-9]\+\>"
+syn match	logtalkNumber		"\<[0-9]\+\.[0-9]\+[eE][-+][0-9]+\>"
+syn match	logtalkNumber		"\<0'[0-9a-zA-Z]\>"
+syn match	logtalkNumber		"\<0b[0-1]\+\>"
+syn match	logtalkNumber		"\<0o[0-7]\+\>"
+syn match	logtalkNumber		"\<0x[0-9a-fA-F]\+\>"
+
+
+syn sync ccomment maxlines=50
+
+
+" 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_logtalk_syn_inits")
+	if version < 508
+		let did_logtalk_syn_inits = 1
+		command -nargs=+ HiLink hi link <args>
+	else
+		command -nargs=+ HiLink hi def link <args>
+	endif
+
+	HiLink	logtalkBlockComment	Comment
+	HiLink	logtalkLineComment	Comment
+
+	HiLink	logtalkOpenEntityDir	Normal
+	HiLink	logtalkOpenEntityDirTag	PreProc
+
+	HiLink	logtalkEntity		Normal
+
+	HiLink	logtalkEntityRel	Normal
+	HiLink	logtalkEntityRelTag	PreProc
+
+	HiLink	logtalkCloseEntityDir	PreProc
+
+	HiLink	logtalkDir		Normal
+	HiLink	logtalkDirTag		PreProc
+
+	HiLink	logtalkAtom		String
+	HiLink	logtalkString		String
+
+	HiLink	logtalkNumber		Number
+
+	HiLink	logtalkKeyword		Keyword
+
+	HiLink	logtalkBuiltIn		Keyword
+	HiLink	logtalkBuiltInMethod	Keyword
+
+	HiLink	logtalkOperator		Operator
+
+	HiLink	logtalkExtCall		Normal
+	HiLink	logtalkExtCallTag	Operator
+
+	HiLink	logtalkVariable		Identifier
+
+	delcommand HiLink
+
+endif
+
+
+let b:current_syntax = "logtalk"
+
+setlocal ts=4