test/jdk/javax/xml/jaxp/testng/validation/jdk8036951/idc.xsd

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:element name="itemList" type="itemListType">
    <xsd:unique name="itemAttr">
      <xsd:selector xpath="item"/>
      <xsd:field    xpath="@uniqueAttr"/>
    </xsd:unique>

    <xsd:key name="itemValueKey">
      <xsd:selector xpath="item"/>
      <xsd:field    xpath="."/>
    </xsd:key>

    <xsd:keyref name="itemKeyRef" refer="itemValueKey">
      <xsd:selector xpath="itemRef"/>
      <xsd:field    xpath="."/>
    </xsd:keyref>
  </xsd:element>
  
  <xsd:element name="item" type="itemType"/>

  <xsd:attribute name="uniqueAttr" type="xsd:string"/>

  <xsd:attribute name="unparsedEntityAttr" type="xsd:ENTITIES"/>

  <xsd:complexType name="itemListType">
    <xsd:sequence>
      <xsd:element ref="item" maxOccurs="unbounded"/>
      <xsd:element name="itemRef" type="xsd:string" maxOccurs="unbounded"/>
    </xsd:sequence>
  </xsd:complexType>

  <xsd:complexType name="itemType">
    <xsd:simpleContent>
      <xsd:extension base="xsd:string">
        <xsd:attribute ref="uniqueAttr" use="required"/>
      </xsd:extension>
    </xsd:simpleContent>
  </xsd:complexType>

</xsd:schema>