[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] XML Schema question on key, keyref constraints
I have a question on XML-Schema: Is it possible to have: <xs:element name="vehicle"> <xs:complexType> <xs:attribute name="plateNumber" type="xs:integer"/> </xs:complexType> </xs:element> <xs:element name="state"> <xs:complexType> <xs:sequence> <xs:element name="code" type="xs:string"/> <xs:element ref="vehicle" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> <xs:key name="reg"> <xs:selector xpath=".//vehicle"/> <xs:field xpath="@plateNumber"/> </xs:key> </xs:element> <xs:element name="person"> <xs:complexType> <xs:sequence> <xs:element name="car" maxOccurs="unbounded"/> <xs:complexType> <xs:attribute name="regPlate" type="xs:integer"/> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> <xs:keyRef name="carRef" refer="reg"> <xs:selector xpath=".//car"/> <xs:field xpath=@regPlate"/> </xs:keyRef> </xs:element> Is the above a correct schema. And in that case can I have a document like <root> <state> <code>CA</code> <vehicle plateNumber="1"/> <vehicle plateNumber="2"/> </state> <state> <code>MA</code> <vehicle plateNumber="1"/> </state> <person> <car regPlate="1"/> </person> <person> <car regPlate="2"/> </person> </root> is this a valid instance for that schema?? thanks, murali.
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