<xs:attributeGroup name="flexAttributes">
    <xs:annotation>
        <xs:documentation>A group of attributes associated with flexible properties</xs:documentation>
    </xs:annotation>
    <xs:attribute name="qcode" type="QCodeType">
        <xs:annotation>
            <xs:documentation>A qualified code which identifies a concept.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="literal" type="xs:normalizedString">
        <xs:annotation>
            <xs:documentation>A free-text value assigned as property value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
    <xs:attribute name="type" type="QCodeType">
        <xs:annotation>
            <xs:documentation>The type of the concept assigned as controlled property value.</xs:documentation>
        </xs:annotation>
    </xs:attribute>
</xs:attributeGroup>