diff --git a/ra/ra-api-1.dtd b/ra/ra-api-1.dtd
deleted file mode 100644
index 8b54b3e..0000000
--- a/ra/ra-api-1.dtd
+++ /dev/null
@@ -1,43 +0,0 @@
-<?xml version="1.0" ?>
-
-<!ELEMENT resource-agent (version,parameters,actions,special) >
-<!ATTLIST resource-agent
-	name	CDATA	#REQUIRED
-	version CDATA   #IMPLIED>
-
-<!ELEMENT version (#PCDATA)>
-
-<!ELEMENT parameters (parameter*)>
-
-<!ELEMENT actions (action*)>
-
-<!ELEMENT parameter (longdesc+,shortdesc+,content)>
-<!ATTLIST parameter
-	name	CDATA	#REQUIRED
-	unique	(1|0)	"0">
-
-<!ELEMENT longdesc ANY>
-<!ATTLIST longdesc
-	lang	NMTOKEN	#IMPLIED>
-
-<!ELEMENT shortdesc ANY>
-<!ATTLIST shortdesc
-	lang	NMTOKEN	#IMPLIED>
-
-<!ELEMENT content EMPTY>
-<!ATTLIST content
-	type	(string|integer|boolean)	#REQUIRED
-	default CDATA	#IMPLIED>
-
-<!ELEMENT action EMPTY>
-<!ATTLIST action
-	name	(start|stop|recover|status|reload|meta-data|verify-all)	#REQUIRED
-	timeout		CDATA	#REQUIRED
-	interval 	CDATA	#IMPLIED
-	start-delay 	CDATA	#IMPLIED
-	depth		CDATA	#IMPLIED>
-
-<!ELEMENT special ANY>
-<!ATTLIST special
-	tag	CDATA	#REQUIRED>
-
diff --git a/ra/ra-api-1.rng b/ra/ra-api-1.rng
new file mode 100644
index 0000000..a288997
--- /dev/null
+++ b/ra/ra-api-1.rng
@@ -0,0 +1,103 @@
+<?xml version="1.0" encoding="utf-8"?>
+<grammar xmlns="http://relaxng.org/ns/structure/1.0">
+
+<start><element name="resource-agent">
+	<attribute name="name" />
+	<optional><attribute name="version" /></optional>
+
+	<element name="version"> <text /> </element>
+
+	<element name="parameters"> <oneOrMore>
+		<element name="parameter">
+			<attribute name="name" />
+			<optional>
+				<attribute name="unique"> <ref name="boolean-values" /> </attribute>
+			</optional>
+
+			<oneOrMore> <element name="longdesc">
+				<attribute name="lang" />
+				<ref name="anyElement" />
+			</element> </oneOrMore>
+
+			<oneOrMore> <element name="shortdesc">
+				<attribute name="lang" />
+				<ref name="anyElement" />
+			</element> </oneOrMore>
+
+			<element name="content">
+				<choice>
+					<attribute name="type">
+						<choice>
+							<value>boolean</value>
+							<value>string</value>
+							<value>integer</value>
+						</choice>
+					</attribute>
+				</choice>
+				<optional>
+					<attribute name="default"> <text /> </attribute>
+				</optional>
+			</element>
+		</element>
+	</oneOrMore> </element>
+
+	<element name="actions"> <oneOrMore>
+		<element name="action">
+			<attribute name="name">
+				<choice>
+					<value>start</value>
+					<value>stop</value>
+					<value>recover</value>
+					<value>status</value>
+					<value>reload</value>
+					<value>meta-data</value>
+					<value>verify-all</value>
+				</choice>
+			</attribute>
+			<attribute name="timeout" />
+			<optional><attribute name="interval" /></optional>
+			<optional><attribute name="start-delay" /></optional>
+			<optional><attribute name="depth" /></optional>
+		</element>
+	</oneOrMore> </element>
+	<element name="special">
+		<attribute name="tag" />
+		<ref name="anyElement" />
+	</element>
+</element></start>
+
+<define name="boolean-values">
+	<choice>
+		<value>0</value>
+		<value>1</value>
+	</choice>
+</define>
+
+<define name="any">
+	 <zeroOrMore>
+		 <choice>
+			 <attribute>
+				 <anyName/>
+			 </attribute>
+			 <text/>
+			 <element>
+					 <anyName/>
+					 <ref name="any" />
+			 </element>
+		 </choice>
+	 </zeroOrMore>
+</define>
+
+<define name="anyElement">
+	 <zeroOrMore>
+		 <choice>
+			 <text/>
+			 <element>
+					 <anyName/>
+					 <ref name="any" />
+			 </element>
+		 </choice>
+	 </zeroOrMore>
+ </define>
+
+</grammar>
diff --git a/ra/ra-metadata-example.xml b/ra/ra-metadata-example.xml
index 96d4f90..71a5dd0 100644
--- a/ra/ra-metadata-example.xml
+++ b/ra/ra-metadata-example.xml
@@ -1,106 +1,105 @@
-<?xml version="1.0"?>
-<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
+<?xml version="1.0" encoding="utf-8"?>
 
 <!-- Root element: give the name of the Resource agent -->
 <resource-agent name="Filesystem" version="FailSafe 1.0.4">
 
 <!-- Version number of the standard this complies with -->
 <version>1.0</version>
 
 <!-- List all the instance parameters the RA supports or requires. -->
 <parameters>
 
 <!-- Note that parameters flagged with 'unique' must be unique; ie no
      other resource instance of this resource type may have the same set
      of unique parameters.
  -->
  
 <parameter name="Mountpoint" unique="1">
 <!-- This is the long, helpful description of what the parameter is all
      about. A user interface might display it to the user if he asks for 
      elaborate help with an option, and it would obviously also provide 
      examples etc.
      
      You can have multiple ones with different "lang" attributes, but this is
      not required.
 -->
 <longdesc lang="en">
 The resource name is the directory where the filesystem will be actually
 mounted.  Please make sure it exists. 
 </longdesc>
 
 <!-- The shortdesc may be displayed by the resource manager as a tooltip or
      equivalent -->
 <shortdesc lang="en">Mountpoint</shortdesc>
 
 <!-- Further definition of the content -->
 <content type="string" default="/mnt" />
 
 </parameter>
 
 <parameter name="Device" unique="1">
 <longdesc lang="en">
 When mounting a filesystem on a specific mountpoint, you have to specify which
 device should be mounted; this will usually be similiar to /dev/sda1 or
 /dev/volumegroup/logicalvolume when using LVM.
 </longdesc>
 <shortdesc lang="en">Device to be mounted</shortdesc>
 <content type="string" default="/dev/"/>
 </parameter>
 
 <parameter name="FSType">
 <longdesc lang="en">
 You should chose a journaled filesystem for the shared storage to ensure that
 the filesystem remains consistent and that it can be mounted without an
 expensive fsck run; recommendations include reiserfs, ext3 and XFS.
 </longdesc>
 <shortdesc lang="en">Type of the filesystem</shortdesc>
 <content type="string" default="reiserfs"/>
 </parameter>
 
 <parameter name="mount_options">
 <longdesc lang="en">
 The mount options used for mounting a filesystem; normally this is set to
 defaults, but you may want to modify this if you require a read-only
 mount or something similar.
 </longdesc>
 <shortdesc lang="en">Mount options for this filesystem</shortdesc>
 <content type="string" default="defaults" />
 </parameter>
 
 </parameters>
 
 <!-- List the actions supported by the RA -->
 <actions>
 <!-- Valid actions: start, stop, recover, status, reload, verify-all
      
      The timeout is given in seconds (or s, m, h, d postfix and their
      usual meanings) and should be a reasonable _hint_ to the RM how
      long a certain action might take in the worst case. 
   -->
 <action name="start"   timeout="2m30s" />
 <action name="stop"    timeout="100" />
 <action name="recover" timeout="150" />
 <!-- In what intervals the RM should poll the RA for status; and how early
      after the start of the RA is should start. Again, this are just
      _defaults_ and can be overridden by the RM. -->
 <action name="status" depth="0"  timeout="20" interval="10" start-delay="1m" />
 <action name="status" depth="10" timeout="60" interval="1h" start-delay="5m" />
 <action name="status" depth="20" timeout="2m" interval="1d" start-delay="1d" />
 <action name="reload"  timeout="60" />
 <action name="meta-data"  timeout="5" />
 <!-- As with all not mandatory actions, this one is only listed if supported
   -->
 <action name="verify-all"  timeout="30" />
 
 </actions>
 
 <!-- Vendor specific attributes; as the content _inside_ the special tag is
      obviously not covered by the RA-API DTD, it will not validate, but oh 
      well...
   -->
 <special tag="FailSafe">
 <Ordering>403</Ordering>
 </special>
 
 </resource-agent>