Sébastien de Mapias wrote:

> Shouldn't it be more clear-cut and legible to do something
> like (and get rid of these attribute groups as well maybe ?):
> ~ <xs:complexType name="segment">
> ~   <xs:key name="segment-id"/>
> ~   <xs:sequence>
> ~     <xs:element name="segment-info" type="segment-info"/>
> ~     <xs:element name="price" type="price" minOccurs="0"/>
> ~     <xs:element name="ticket-ref" minOccurs="0">
> ~         <xs:keyref name="ticket-id-ref" ref="ticket-id"/>
> ~     </xs:element>
> ~   </xs:sequence>
> ~ </xs:complexType>
> ~
> ~ <xs:complexType name="ticket">
> ~   <xs:key name="ticket-id"/>
> ~   <xs:sequence>
> ~     <xs:element name="price" type="price" minOccurs="0">
> ~     </xs:element>
> ~     [...]
> ~   </xs:sequence>
> ~ </xs:complexType>

You need four definitions, one for the element or attribute which is an 
id or key, one for the element or attribute which is an id reference or 
key reference, one for defining the key with xs:key, and the last for 
defining the key reference with xs:keyref. See 
http://www.w3.org/TR/xmlschema-0/#specifyingKeysAndtheirRefs


-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/