<?xml version="1.0"?>

<xs:schema 
targetNamespace="http://www.ruleml.org/0.87/xsd"
xmlns="http://www.ruleml.org/0.87/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: 0.87
			Last Modification: 2004-07-23
			
			This module declares the following RuleML attribute:
			* @href
			
			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>

	<!--
		*** @href ***

		Fixed arguments to relations etc. normally enclose non-empty PCDATA content between
		'Ind' tags, so individuals having empty content can be used like null values in databases.

		Fixed arguments to relations etc. can also have the character of objects (resources).

		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 'href' attribute of Inds.
		The 'href' attribute may be used in the following tags: Ind, Rel, Fun And Ctor.
	-->	
	<xs:attributeGroup name="href.attrib">
		<xs:attribute name="href" type="xs:anyURI" use="optional"/>
	</xs:attributeGroup>
		
</xs:schema>