XQTS/TestSources/constraints.xsd


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

  <xsd:element name="a" type="constraints:myList">
    <xsd:unique name="myId">
      <xsd:selector xpath="./b"/>
      <xsd:field xpath="@id"/>
    </xsd:unique>
  </xsd:element>

  <xsd:complexType name="myList">
    <xsd:sequence minOccurs="1">
      <xsd:element name="b" minOccurs="1" maxOccurs="unbounded">
        <xsd:complexType>
          <xsd:attribute name="id" type="xsd:NCName"/>
        </xsd:complexType>
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>

  <xsd:element name="a2" type="constraints:myList2">
    <xsd:key name="myId2">
      <xsd:selector xpath="./b2"/>
      <xsd:field xpath="@id"/>
    </xsd:key>
    <xsd:keyref name="myIdref" refer="constraints:myId2">
      <xsd:selector xpath="./b2ref/c"/>
      <xsd:field xpath="@idref"/>
    </xsd:keyref> 
  </xsd:element>

  <xsd:complexType name="myList2">
    <xsd:sequence minOccurs="1">
      
      <xsd:element name="b2" minOccurs="1" maxOccurs="unbounded">
        <xsd:complexType>
          <xsd:attribute name="id" type="xsd:NCName"/>
        </xsd:complexType>
      </xsd:element>

      <xsd:element name="b2ref" minOccurs="0" maxOccurs="unbounded">
        <xsd:complexType>
          <xsd:sequence minOccurs="1">
            <xsd:element name="c" minOccurs="1" maxOccurs="unbounded">
              <xsd:complexType>
                <xsd:attribute name="idref" type="xsd:NCName" use="required"/>
              </xsd:complexType>
            </xsd:element>
          </xsd:sequence>
        </xsd:complexType> 
      </xsd:element>
    </xsd:sequence>
  </xsd:complexType>

</xsd:schema>