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RE: XML Schema Validation

From: Michael Kay <mike@saxonica.com>
Date: Wed, 10 Jan 2007 15:35:36 -0000
To: <nucci@ancitel.it>, <xmlschema-dev@w3.org>
Message-ID: <018b01c734cc$fa043160$6401a8c0@turtle>

libxml2 seems to be objecting to the fact that BaseTypes.xsd is included
more than once (into both RipostaMacroTypes.xsd and
RichiestaMacroTypes.xsd). The schema spec is pretty vague in this kind of
area, for reasonable reasons: if the two includes used different URIs, it
would be hard for the processor to work out that they were actually two
includes of the same file, and if they were different files, then they would
contain conflicting definitions. But I would have expected any reasonable
processor to allow this case. Raise it with the supplier.

As it happens, Saxon hits a different problem with this schema. It objects
incorrectly to

			<xs:enumeration value="3 ">

on line 1748 of BaseTypes.xsd, saying that it violates maxLength="1". (It
doesn't, in fact, because whiteSpace is set to collapse). Another bug bites
the dust.

Michael Kay

> -----Original Message-----
> From: xmlschema-dev-request@w3.org 
> [mailto:xmlschema-dev-request@w3.org] On Behalf Of Andrea Nucci
> Sent: 10 January 2007 12:42
> To: xmlschema-dev@w3.org
> Subject: XML Schema Validation
> I'm using the xml schema and the xml file (Nascita.xml) here attached.
> I've tried to validate the xml file using the W3C Schema Validator
> (http://www.w3.org/2001/03/webdata/xsv) and libxml 2.6.26
> (http://www.xmlsoft.org)
> The results are different:
> - the W3C Schema Validator validates my file
> - libxml2 validator returns "The schema document 
> 'BaseTypes.xsd' cannot be imported, since it was already 
> included or redefined"
> Anyone can help me to understand why this happens? And how to 
> solve or avoid my problem...
> Thank you in advance.
> --
> Andrea Nucci
> Ancitel S.p.A.
> Tel. 06.7887336
> nucci@ancitel.it
> http://www.ancitel.it
Received on Wednesday, 10 January 2007 15:36:00 UTC

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