<element name="ValuesReference">
    <annotation>
        <documentation>Reference to externally specified list of all the valid values and/or ranges of values for this quantity. (Informative: This element was simplified from the metaDataProperty element in GML 3.0.) </documentation>
    </annotation>
    <complexType>
        <simpleContent>
            <extension base="string">
                <annotation>
                    <documentation>Human-readable name of the list of values provided by the referenced document. Can be empty string when this list has no name. </documentation>
                </annotation>
                <attribute ref="ows:reference" use="required">
                </attribute>
            </extension>
        </simpleContent>
    </complexType>
</element>