scope

<xsd:attribute name="scope" use="required">
  <xsd:simpleType>
    <xsd:restriction base="xsd:string">
      <xsd:enumeration value="baseObject"/>
      <xsd:enumeration value="singleLevel"/>
      <xsd:enumeration value="wholeSubtree"/>
    </xsd:restriction>
  </xsd:simpleType>
</xsd:attribute>