<xs:complexType name="topLevelElement" abstract="true" >
  <xs:complexContent mixed="false">
    <xs:restriction base="xs:element">
      <xs:sequence>
        <xs:element minOccurs="0" ref="xs:annotation"/>
        <xs:choice minOccurs="0">
          <xs:element name="simpleType" type="xs:localSimpleType"/>
          <xs:element name="complexType" type="xs:localComplexType"/>
        </xs:choice>
        <xs:group minOccurs="0" maxOccurs="unbounded" ref="xs:identityConstraint"/>
      </xs:sequence>
      <xs:attribute name="ref" use="prohibited"/>
      <xs:attribute name="form" use="prohibited"/>
      <xs:attribute name="minOccurs" use="prohibited"/>
      <xs:attribute name="maxOccurs" use="prohibited"/>
      <xs:attribute name="name" type="xs:NCName" use="required"/>
      <xs:anyAttribute namespace="##other" processContents="lax"/>
    </xs:restriction>
  </xs:complexContent>
</xs:complexType>