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Re: SOAP and WSDL and inheritance by restriction

From: Jeni Tennison <jeni@jenitennison.com>
Date: Wed, 12 Dec 2001 18:44:20 +0000
Message-ID: <12110463035.20011212184420@jenitennison.com>
To: xmlschema-dev@w3.org
Hi James,

> However, you will notice the wsdl:arrayType attribute on the definition
> of this attribute. The WSDL spec describes it as follows:
>   At the time of this writing, the XSD specification does not have a
>   mechanism for specifying the default value of an attribute which
>   contains a QName value. To overcome this limitation, WSDL introduces
>   the arrayType attribute (from namespace
>   http://schemas.xmlsoap.org/wsdl/) which has the semantic of
>   providing the default value. If XSD is revised to support this
>   functionality, the revised mechanism SHOULD be used in favor of the
>   arrayType attribute defined by WSDL.
> Was such a mechanism ever added to the schema specification?

QNames are a little underspecified in XML Schema Part 2 - specifically
there's no 'canonical lexical representation' of a QName - but I'm
pretty sure that the intention is that you should be able to use
QNames in the default attribute of xs:attribute just as you can any
other value.

The prefix in the default QName should get resolved relative to the
namespace declarations in scope for the xs:attribute element in the
schema, rather than the namespace declarations in scope for the
attribute instance in the instance document (in other words, treat it
as a QName not a literal string), but I think that's the only thing
you need to watch out for.



Jeni Tennison
Received on Wednesday, 12 December 2001 13:44:24 UTC

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