xs:simpleDerivationSet

<xs:simpleType name="simpleDerivationSet">
  <xs:annotation>
    <xs:documentation>#all or (possibly empty) subset of {restriction, union, list}</xs:documentation>
    <xs:documentation>A utility type, not for public use</xs:documentation>
  </xs:annotation>
  <xs:union>
    <xs:simpleType>
      <xs:restriction base="xs:token">
        <xs:enumeration value="#all"/>
      </xs:restriction>
    </xs:simpleType>
    <xs:simpleType>
      <xs:list>
        <xs:simpleType>
          <xs:restriction base="xs:derivationControl">
            <xs:enumeration value="list"/>
            <xs:enumeration value="union"/>
            <xs:enumeration value="restriction"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:list>
    </xs:simpleType>
  </xs:union>
</xs:simpleType>