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diff --git a/vim73/syntax/grads.vim b/vim73/syntax/grads.vim
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+" Vim syntax file
+" Language:	grads (GrADS scripts)
+" Maintainer:	Stefan Fronzek (sfronzek at gmx dot net)
+" Last change: 13 Feb 2004
+
+" Grid Analysis and Display System (GrADS); http://grads.iges.org/grads
+" This syntax file defines highlighting for only very few features of
+" the GrADS scripting language.
+
+" 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
+
+" GrADS is entirely case-insensitive.
+syn case ignore
+
+" The keywords
+
+syn keyword gradsStatement	if else endif break exit return
+syn keyword gradsStatement	while endwhile say prompt pull function
+syn keyword gradsStatement subwrd sublin substr read write close
+" String
+
+syn region gradsString		start=+'+ end=+'+
+
+" Integer number
+syn match  gradsNumber		"[+-]\=\<[0-9]\+\>"
+
+" Operator
+
+"syn keyword gradsOperator	| ! % & != >=
+"syn match gradsOperator		"[^\.]not[^a-zA-Z]"
+
+" Variables
+
+syn keyword gradsFixVariables	lat lon lev result rec rc
+syn match gradsglobalVariables	"_[a-zA-Z][a-zA-Z0-9]*"
+syn match gradsVariables		"[a-zA-Z][a-zA-Z0-9]*"
+syn match gradsConst		"#[A-Z][A-Z_]+"
+
+" Comments
+
+syn match gradsComment	"\*.*"
+
+" Typical Typos
+
+" for C programmers:
+" syn match gradsTypos	"=="
+" syn match gradsTypos	"!="
+
+" 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 hgs highlighting+yet
+if version >= 508 || !exists("did_gs_syn_inits")
+  if version < 508
+	let did_gs_syn_inits = 1
+	command -nargs=+ HiLink hi link <args>
+  else
+	command -nargs=+ HiLink hi def link <args>
+  endif
+
+  HiLink gradsStatement		Statement
+
+  HiLink gradsString		String
+  HiLink gradsNumber		Number
+
+  HiLink gradsFixVariables	Special
+  HiLink gradsVariables		Identifier
+  HiLink gradsglobalVariables	Special
+  HiLink gradsConst		Special
+
+  HiLink gradsClassMethods	Function
+
+  HiLink gradsOperator		Operator
+  HiLink gradsComment		Comment
+
+  HiLink gradsTypos		Error
+
+  delcommand HiLink
+endif
+
+let b:current_syntax = "grads"