diff --git a/runtime/syntax/dts.vim b/runtime/syntax/dts.vim
index 62764ca..d7663cf 100644
--- a/runtime/syntax/dts.vim
+++ b/runtime/syntax/dts.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	dts/dtsi (device tree files)
 " Maintainer:	Daniel Mack <vim@zonque.org>
-" Last Change:	2013 Mar 11
+" Last Change:	2013 Apr 05
 
 if exists("b:current_syntax")
   finish
@@ -13,7 +13,7 @@
 syntax match  dtsStringProperty "\".*\""
 syntax match  dtsKeyword        "/.*/"
 syntax match  dtsLabel          "^[[:space:]]*[[:alpha:][:digit:]_]\+:"
-syntax match  dtsNode           /[[:alpha:][:digit:]-_]\+\(@[0-9a-eA-E]\+\|\)[[:space:]]*{/he=e-1
+syntax match  dtsNode           /[[:alpha:][:digit:]-_]\+\(@[0-9a-fA-F]\+\|\)[[:space:]]*{/he=e-1
 syntax region dtsCellProperty   start="<" end=">" contains=dtsReference,dtsBinaryProperty,dtsStringProperty,dtsComment
 syntax region dtsCommentInner   start="/\*"  end="\*/"
 
diff --git a/runtime/syntax/pf.vim b/runtime/syntax/pf.vim
index 394cfb3..1a8f34b 100644
--- a/runtime/syntax/pf.vim
+++ b/runtime/syntax/pf.vim
@@ -1,7 +1,8 @@
 " pf syntax file
-" Language:	OpenBSD packet filter configuration (pf.conf)
-" Maintainer:	Camiel Dobbelaar <cd@sentia.nl>
-" Last Change:	2003 May 27
+" Language:        OpenBSD packet filter configuration (pf.conf)
+" Original Author: Camiel Dobbelaar <cd@sentia.nl>
+" Maintainer:      Lauri Tirkkonen <lotheac@iki.fi>
+" Last Change:     2013 Apr 02
 
 " For version 5.x: Clear all syntax items
 " For version 6.x: Quit when a syntax file was already loaded
@@ -14,7 +15,7 @@
 setlocal foldmethod=syntax
 syn sync fromstart
 
-syn cluster	pfNotLS		contains=pfComment,pfTodo,pfVarAssign
+syn cluster	pfNotLS		contains=pfTodo,pfVarAssign
 syn keyword	pfCmd		altq anchor antispoof binat nat pass
 syn keyword	pfCmd		queue rdr scrub table set
 syn keyword	pfService	auth bgp domain finger ftp http https ident
diff --git a/runtime/syntax/rng.vim b/runtime/syntax/rng.vim
new file mode 100644
index 0000000..1ef864c
--- /dev/null
+++ b/runtime/syntax/rng.vim
@@ -0,0 +1,25 @@
+" Vim syntax file
+" Language:    RELAX NG
+" Maintainer:  Jaromir Hradilek <jhradilek@gmail.com>
+" URL:         https://github.com/jhradilek/vim-rng
+" Last Change: 25 March 2013
+" Description: A syntax file for RELAX NG, a schema language for XML
+
+if exists('b:current_syntax')
+  finish
+endif
+
+do Syntax xml
+syn spell toplevel
+syn cluster xmlTagHook add=rngTagName
+syn case match
+
+syn keyword rngTagName anyName attribute choice data define div contained
+syn keyword rngTagName element empty except externalRef grammar contained
+syn keyword rngTagName group include interleave list mixed name contained
+syn keyword rngTagName notAllowed nsName oneOrMore optional param contained
+syn keyword rngTagName parentRef ref start text value zeroOrMore contained
+
+hi def link rngTagName Statement
+
+let b:current_syntax = 'rng'