<xs:attributeGroup name="cn.attlist" >
  <xs:attribute name="base">
    <xs:simpleType>
      <xs:restriction base="xs:positiveInteger">
        <xs:minInclusive value="2"/>
        <xs:maxInclusive value="36"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
  <xs:attribute name="type">
    <xs:simpleType>
      <xs:restriction base="xs:NMTOKEN">
        <xs:enumeration value="integer"/>
        <xs:enumeration value="rational"/>
        <xs:enumeration value="real"/>
        <xs:enumeration value="complex-cartesian"/>
        <xs:enumeration value="complex-polar"/>
        <xs:enumeration value="constant"/>
      </xs:restriction>
    </xs:simpleType>
  </xs:attribute>
  <xs:attributeGroup ref="Definition.attrib"/>
  <xs:attributeGroup ref="Common.attrib"/>
</xs:attributeGroup>