setting attribute in complextype restriction

renting · 08-10-2009, 07:55 PM

I have the following code:

Code:

	<xs:complexType name="Frequency">
		<xs:simpleContent>
			<xs:extension base="xs:double">
				<xs:attribute name="units" use="required">
					<xs:simpleType>
						<xs:restriction base="xs:string">
							<xs:enumeration value="Hz"/>
							<xs:enumeration value="KHz"/>
							<xs:enumeration value="MHz"/>
							<xs:enumeration value="GHz"/>
						</xs:restriction>
					</xs:simpleType>
				</xs:attribute>
			</xs:extension>
		</xs:simpleContent>
	</xs:complexType>

Code:

<xs:complexType name="ClockType">
		<xs:simpleContent>
			<xs:restriction base="Frequency">
				<xs:enumeration value="160"/>
				<xs:enumeration value="200"/>
			</xs:restriction>
		</xs:simpleContent>
	</xs:complexType>

My problem is, that for the life of me, I can't figure out how to set the units attribute when restricting Frequency in ClockType. What I want to do is have ClockType be either 160MHz or 200MHz.

Does anyone have a clue how to do this?

Thank you for any replies.

renting · 08-19-2009, 09:58 AM

I got some help elsewhere and figured out a way to do this:

Code:

  <xs:simpleType name="frequencyunit">
    <xs:restriction base="xs:string">
      <xs:enumeration value="Hz" />
      <xs:enumeration value="KHz" />
      <xs:enumeration value="MHz" />
      <xs:enumeration value="GHz" />
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="Frequency">
    <xs:simpleContent>
      <xs:extension base="xs:double">
        <xs:attribute name="units" type="frequencyunit" use="required" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="ClockType">
    <xs:simpleContent>
      <xs:restriction base="Frequency">
        <xs:enumeration value="160" />
        <xs:enumeration value="200" />
        <xs:attribute fixed="MHz" name="units" type="frequencyunit" use="required" />
      </xs:restriction>
    </xs:simpleContent>
  </xs:complexType>