<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns="http://purl.org/dc/elements/1.1/"
           targetNamespace="http://purl.org/dc/elements/1.1/"
           elementFormDefault="qualified"
           attributeFormDefault="unqualified">

  <xs:annotation>
    <xs:documentation xml:lang="en">
      Simple DC XML Schema, 2002-10-09
      by Pete Johnston (p.johnston@ukoln.ac.uk),
      Carl Lagoze (lagoze@cs.cornell.edu), Andy Powell (a.powell@ukoln.ac.uk),
      Herbert Van de Sompel (hvdsomp@yahoo.com).
      This schema defines terms for Simple Dublin Core, i.e. the 15
      elements from the http://purl.org/dc/elements/1.1/ namespace, with
      no use of encoding schemes or element refinements.
      Default content type for all elements is xs:string with xml:lang
      attribute available.

      Supercedes version of 2002-03-12. 
      Amended to remove namespace declaration for http://www.w3.org/XML/1998/namespace namespace,
      and to reference lang attribute via built-in xml: namespace prefix.
      xs:appinfo also removed.
    </xs:documentation>
  </xs:annotation>

  <xs:import namespace="http://www.w3.org/XML/1998/namespace"
  	schemaLocation="./xml.xsd"/>

  <xs:element name="title" type="elementType"/>
  <xs:element name="creator" type="elementType"/>
  <xs:element name="subject" type="elementType"/>
  <xs:element name="description" type="elementType"/>
  <xs:element name="publisher" type="elementType"/>
  <xs:element name="contributor" type="elementType"/>
  <xs:element name="date" type="elementType"/>
  <xs:element name="type" type="elementType"/>
  <xs:element name="format" type="elementType"/>
  <xs:element name="identifier" type="elementType"/>
  <xs:element name="source" type="elementType"/>
  <xs:element name="language" type="elementType"/>
  <xs:element name="relation" type="elementType"/>
  <xs:element name="coverage" type="elementType"/>
  <xs:element name="rights" type="elementType"/>

  <xs:group name="elementsGroup">
  <xs:sequence>
    <xs:choice minOccurs="0" maxOccurs="unbounded">
      <xs:element ref="title"/>
      <xs:element ref="creator"/>
      <xs:element ref="subject"/>
      <xs:element ref="description"/>
      <xs:element ref="publisher"/>
      <xs:element ref="contributor"/>
      <xs:element ref="date"/>
      <xs:element ref="type"/>
      <xs:element ref="format"/>
      <xs:element ref="identifier"/>
      <xs:element ref="source"/>
      <xs:element ref="language"/>
      <xs:element ref="relation"/>
      <xs:element ref="coverage"/>
      <xs:element ref="rights"/>
    </xs:choice>
    </xs:sequence>
  </xs:group>

  <xs:complexType name="elementType">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute ref="xml:lang" use="optional"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

</xs:schema>


