<xs:element name="solution"> <xs:complexType> <xs:sequence> </xs:sequence> <xs:attribute default="1.0" name="version" type="xs:string" use="optional"/>
</xs:complexType> <xs:key name="linkIdInConfiguration"> <xs:selector xpath="linkConfigurations/linkConfiguration"/>
<xs:field xpath="@linkId"/>
</xs:key> <xs:key name="demandIdInRouting"> <xs:selector xpath="demandRoutings/demandRouting"/>
<xs:field xpath="@demandId"/>
</xs:key> <xs:keyref name="linkIdInRoutingPath" refer="linkIdInConfiguration"> <xs:selector xpath="demandRoutings/demandRouting/flowPath/routingPath/linkId"/>
<xs:field xpath="."/>
</xs:keyref> </xs:element>