<xs:attributeGroup name="qualifyingAttributes">
    <xs:annotation>
        <xs:documentation> A group of attributes used for a qualified expression of the property</xs:documentation>
    </xs:annotation>
    <xs:attribute name="qcode" type="QCodeType" use="optional">
        <xs:annotation>
            <xs:documentation>A qualified code assigned as a property value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="literal" type="xs:normalizedString" use="optional">
        <xs:annotation>
            <xs:documentation>A free-text value assigned as a property
value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="type" type="QCodeType" use="optional">
        <xs:annotation>
            <xs:documentation>The type of the concept assigned as a controlled or an uncontrolled property value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="role" type="QCodeType" use="optional">
        <xs:annotation>
            <xs:documentation>A refinement of the semantics of the property.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>