<xs:complexType name="realGroup" abstract="true" >
  <xs:complexContent mixed="false">
    <xs:restriction base="xs:group">
      <xs:sequence>
        <xs:element minOccurs="0" ref="xs:annotation"/>
        <xs:choice minOccurs="0" maxOccurs="1">
          <xs:element ref="xs:all"/>
          <xs:element ref="xs:choice"/>
          <xs:element ref="xs:sequence"/>
        </xs:choice>
      </xs:sequence>
      <xs:anyAttribute namespace="##other" processContents="lax"/>
    </xs:restriction>
  </xs:complexContent>
</xs:complexType>