<xsd:group name="docRefs">
  <xsd:annotation>
    <xsd:documentation>
      <type>Group</type>
      <name>docRefs</name>
      <comment>The group docrefs is a list of types of legal references to documents.</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:choice>
    <xsd:element ref="original"/>
    <xsd:element ref="passiveRef"/>
    <xsd:element ref="activeRef"/>
    <xsd:element ref="jurisprudence"/>
    <xsd:element ref="hasAttachment"/>
    <xsd:element ref="attachmentOf"/>
  </xsd:choice>
</xsd:group>