<xsd:element name="FRBRportion">
  <xsd:annotation>
    <xsd:documentation>
      <type>Element</type>
      <name>FRBRportion</name>
      <comment>The element FRBRportion is the metadata property containing the eId of the portion contained in a manifestation-level portion. If the portion contains an interval of elements, the upTo attribute specifies the last one.</comment>
    </xsd:documentation>
  </xsd:annotation>
  <xsd:complexType>
    <xsd:complexContent>
      <xsd:extension base="metaopt">
        <xsd:attributeGroup ref="refers"/>
        <xsd:attributeGroup ref="showopt"/>
        <xsd:attribute name="from" type="xsd:anyURI" use="required"/>
        <xsd:attribute name="upTo" type="xsd:anyURI"/>
      </xsd:extension>
    </xsd:complexContent>
  </xsd:complexType>
</xsd:element>

<xsd:attribute name="from" type="xsd:anyURI" use="required"/>

<xsd:attribute name="upTo" type="xsd:anyURI"/>