<?xml version="1.0"?>

<xs:schema 
targetNamespace="http://www.ruleml.org/0.89/xsd"
xmlns="http://www.ruleml.org/0.89/xsd"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
>

	<xs:annotation>
		<xs:documentation xml:lang="en">
			UR RuleML attribute module.
			This is the XML Schema ur module for RuleML.
			File: ur_module.xsd
			Version: 0.89
			Last Modification: 2005-05-27
			
			This module declares the following RuleML attribute:
			* @wref
			* @wlab
			
			The approach is modelled after that used in "Modularization of XHTML in XML Schema"
			WD [http://www.w3.org/TR/xhtml-m12n-schema/], which will soon be integrated with
			"Modularization of XHTML" (REC-xhtml-modularization-20010410)
			[http://www.w3.org/TR/xhtml-modularization/].
		</xs:documentation>
	</xs:annotation>

	<!--
		*** @wref ***

		Objects (resources) are Inds using a URL/URI as their OID, as in SHOE or RDF (cf. URML).
		Named objects (resources) additionally enclose some non-empty PCDATA content between
		'Ind' tags.  Now individuals with empty content are anonymous objects (resources).

		Like for XHTML anchors, the URI can be used under an optional 'wref' attribute of
		Ind, Rel, Fun And Ctor.
	-->	
	<xs:attributeGroup name="wref.attrib">
		<xs:attribute name="wref" type="xs:anyURI" use="optional"/>
	</xs:attributeGroup>
	
	<!--
		*** @wlab ***
		
		A web label, complementing wref, only available on Inds (or Cons, in frame sublanguages)
		within an oid.
	-->	
	<xs:attributeGroup name="wlab.attrib">
		<xs:attribute name="wlab" type="xs:anyURI" use="optional"/>
	</xs:attributeGroup>
		
</xs:schema>