<attribute name="rangeClosure" default="closed">
    <annotation>
        <documentation>Specifies which of the minimum and maximum values are included in the range. Note that plus and minus infinity are considered closed bounds. </documentation>
    </annotation>
    <simpleType>
        <restriction base="NMTOKENS">
            <enumeration value="closed">
                <annotation>
                    <documentation>The specified minimum and maximum values are included in this range. </documentation>
                </annotation>
            </enumeration>
            <enumeration value="open">
                <annotation>
                    <documentation>The specified minimum and maximum values are NOT included in this range. </documentation>
                </annotation>
            </enumeration>
            <enumeration value="open-closed">
                <annotation>
                    <documentation>The specified minimum value is NOT included in this range, and the specified maximum value IS included in this range. </documentation>
                </annotation>
            </enumeration>
            <enumeration value="closed-open">
                <annotation>
                    <documentation>The specified minimum value IS included in this range, and the specified maximum value is NOT included in this range. </documentation>
                </annotation>
            </enumeration>
        </restriction>
    </simpleType>
</attribute>