Database Software

Does anybody know if the ID and IDREF attributes within an XSD schema are implied when inserting an XML document or do I have to invoke an XML parser and do it via a DTD?

When I test the XSD no validation is being performed on the ID and IDREF attributes. Yet when I use the parser the document raises the required errors.

Regards

Andrew

Schema extra:

<xs:complexType name="PAYMENT" xdb:SQLType="XML_PAYMENT">
<xs:sequence>
<xs:choice>
<xs:element name="USER_ID" type="xs:integer" nillable="false" xdb:SQLType="NUMBER" />
<xs:element name="SERVICE_ID" type="xs:integer" nillable="false" xdb:SQLType="NUMBER" />
</xs:choice>
<xs:element name="CHARGE" type="CHARGE_TYPE" />
</xs:sequence>
<xs:attribute name="PAYMENT_ID" type="xs:ID" use="required" />
<xs:attribute name="PAYMENT_IDREF" type="xs:IDREF" />
</xs:complexType>