diff --git a/runtime/syntax/yacc.vim b/runtime/syntax/yacc.vim
index c3916d0..4e74eab 100644
--- a/runtime/syntax/yacc.vim
+++ b/runtime/syntax/yacc.vim
@@ -1,12 +1,22 @@
 " Vim syntax file
 " Language:	Yacc
 " Maintainer:	Charles E. Campbell, Jr. <NdrOchipS@PcampbellAfamily.Mbiz>
-" Last Change:	Aug 2, 2010
-" Version:	8
+" Last Change:	Aug 12, 2010
+" Version:	9
 " URL:	http://mysite.verizon.net/astronaut/vim/index.html#vimlinks_syntax
 "
 " Options: {{{1
 "   g:yacc_uses_cpp : if this variable exists, then C++ is loaded rather than C
+"
+" Overall layout of a bison/yacc grammer:
+"   %{
+"    Prolog
+"   %}
+"   Bison/Yacc Declarations
+"   %%
+"   Grammar Rules
+"   %%
+"   Epilogue
 
 " ---------------------------------------------------------------------
 " this version of syntax/yacc.vim requires 6.0 or later
@@ -35,7 +45,7 @@
 
 " ---------------------------------------------------------------------
 "  Yacc Clusters: {{{1
-syn cluster yaccInitCluster	contains=yaccKey,yaccKeyActn,yaccBrkt,yaccType,yaccString,yaccUnionStart,yaccHeader2,yaccComment,yaccDefines,yaccParseParam
+syn cluster yaccInitCluster	contains=yaccKey,yaccKeyActn,yaccBrkt,yaccType,yaccString,yaccUnionStart,yaccHeader2,yaccComment,yaccDefines,yaccParseParam,yaccParseOption
 syn cluster yaccRulesCluster	contains=yaccNonterminal,yaccString
 
 " ---------------------------------------------------------------------
@@ -50,7 +60,8 @@
 " ---------------------------------------------------------------------
 " Yacc Commands: {{{1
 syn	match	yaccDefines	'^%define\s\+.*$'
-syn	match	yaccParseParam	'%parse-param\>'	skipwhite	nextgroup=yaccParseParamStr
+syn	match	yaccParseParam	'%\(parse\|lex\)-param\>'		skipwhite	nextgroup=yaccParseParamStr
+syn	match	yaccParseOption '%\%(api\.pure\|pure-parser\|locations\|error-verbose\)\>'
 syn	region	yaccParseParamStr	contained matchgroup=Delimiter	start='{'	end='}'	contains=cStructure
 
 syn	match	yaccDelim	"[:|]"	contained
@@ -96,7 +107,8 @@
   HiLink yaccCurly	Delimiter
   HiLink yaccCurlyError	Error
   HiLink yaccDefines	cDefine
-  HiLink yaccParseParam	cDefine
+  HiLink yaccParseParam	yaccParseOption
+  HiLink yaccParseOption	cDefine
   HiLink yaccNonterminal	Function
   HiLink yaccDelim	Delimiter
   HiLink yaccKeyActn	Special