<xsd:element name="publication">
  <xsd:annotation>
    <xsd:documentation>
      <type>Element</type>
      <name>publication</name>
      <comment>The element publication is the metadata container specifying an official publication event for the FRBR expression of the document.</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:complexContent>
      <xsd:extension base="metaopt">
        <xsd:attributeGroup ref="date"/>
        <xsd:attributeGroup ref="show"/>
        <xsd:attributeGroup ref="name"/>
        <xsd:attributeGroup ref="number"/>
        <xsd:attributeGroup ref="refers"/>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:element>