<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    
    <xs:include schemaLocation="value.xsd"/>
    <xs:include schemaLocation="measure.xsd"/>
    
    <xs:annotation>
        <xs:documentation xml:lang="en">
            Jeospace geometry elements
        </xs:documentation>
    </xs:annotation>
    
    <xs:element name="smax" type="nonNegativeLengthType"/>
    <xs:element name="smin" type="nonNegativeLengthType"/>
    
    <xs:element name="Ellipsoid">
        <xs:complexType>
            <xs:sequence minOccurs="0">
                <xs:element ref="smax"/>
                <xs:choice>
                    <xs:sequence>
                        <xs:element ref="smin"/>
                    </xs:sequence>
                    <xs:sequence>
                        <xs:element name="invf" type="positiveDoubleValueType"/>
                    </xs:sequence>
                </xs:choice>
            </xs:sequence>
            <xs:attribute name="id" type="xs:token" use="required"/>
        </xs:complexType>
    </xs:element>
    
</xs:schema>