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RE: base attributes and Schema Validation

From: Jonathan Marsh <jmarsh@microsoft.com>
Date: Thu, 12 Jun 2003 16:48:46 -0700
Message-ID: <1113DDB24D4A2841951BFDF86665EE190693C56B@RED-MSG-10.redmond.corp.microsoft.com>
To: "Peter McCracken" <peterjm@ca.ibm.com>, <www-xml-xinclude-comments@w3.org>

I haven't heard that problem before, and it concerns me.

XInclude adds xml:base attributes so that the [base URI] property and
any xml:base attributes stay in sync.  However, this could be considered
the job of the serializer rather than XInclude, which already has to
account for the possibility of [base URI] changes even if no xml:base
attributes are present.

Perhaps there should be a processor option for turning off the automatic
insertion of xml:base attributes.

Or maybe this is just a clue that schema writers should make allowances
for xml:base attributes, which might be added by XInclude, or by [base
URI]-aware serializers.

> -----Original Message-----
> From: www-xml-xinclude-comments-request@w3.org
[mailto:www-xml-xinclude-
> comments-request@w3.org] On Behalf Of Peter McCracken
> Sent: Thursday, June 12, 2003 2:09 PM
> To: www-xml-xinclude-comments@w3.org
> Subject: xml:base attributes and Schema Validation
> 
> 
> Hello,
> 
> I'm implementing an XInclude processor, and one of my goals is to make
the
> processing transparent to the Schema validator, if the XInclude
processing
> is performed before the validation.
> 
> However, in section 4.5.5 of the spec, it is specified that xml:base
> attributes are added to the top level included items, if the [base
URI] is
> different than the include parent's [base URI]. This creates problems
with
> schema validation, unless the xml:base attribute is specifically
allowed
> in
> the schema, which interferes with the transparency of the XInclude
> processor.
> 
> I'm wondering if anyone else has encountered this problem, and in
hearing
> any approaches they had to solving it.
> 
> Thank you,
> Peter McCracken
> IBM Toronto Lab
Received on Thursday, 12 June 2003 19:49:06 UTC

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