<complexType name="RelatedTimeType">
    <complexContent>
        <extension base="gml:TimePrimitivePropertyType">
            <attribute name="relativePosition">
                <simpleType>
                    <restriction base="string">
                        <enumeration value="Before" />
                        <enumeration value="After" />
                        <enumeration value="Begins" />
                        <enumeration value="Ends" />
                        <enumeration value="During" />
                        <enumeration value="Equals" />
                        <enumeration value="Contains" />
                        <enumeration value="Overlaps" />
                        <enumeration value="Meets" />
                        <enumeration value="OverlappedBy" />
                        <enumeration value="MetBy" />
                        <enumeration value="BegunBy" />
                        <enumeration value="EndedBy" />
                    </restriction>
                </simpleType>
            </attribute>
        </extension>
    </complexContent>
</complexType>

• gml:TimePrimitivePropertyType
  • RelatedTimeType
  • gml:relatedTime