- From: Andy Clark <andyc@apache.org>
- Date: Mon, 29 Jan 2001 18:30:12 -0800
- To: "xmlschema-dev@w3.org" <xmlschema-dev@w3.org>
As I'm implementing identity constraints in Xerces, I have the following question: must steps in the XPaths used for selectors and fields of identity constraints be fully qualified? This only applies when the grammar specifies a target namespace, of course. I raise the question because a sample grammar in the primer (report.xsd in section 5) doesn't qualify the steps but this seems to contradict the way you must reference names declared within a namespace. For example, I must qualify element references when used within a namespace, like so: <schema xmlns='http://www.w3.org/2000/10/XMLSchema' targetNamespace='NS' xmlns:ns='NS'> <element name='foo'> <...> <element ref='ns:bar'/> <...> </element> <element name='bar'> <...> </element> </schema> But not for XPaths used for selectors and fields of identity constraints, like so: <schema xmlns='http://www.w3.org/2000/10/XMLSchema' targetNamespace='NS' xmlns:ns='NS'> <element name='foo'> <...> <unique> <selector xpath='bar'/> <field xpath='@baz'/> </unique> </element> </schema> Is this inconsistency intended? I couldn't tell from looking at the primer or structures parts of the specification. -- Andy Clark * IBM, TRL - Japan * andyc@apache.org
Received on Monday, 29 January 2001 21:34:17 UTC