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RE: MSXML and the "<any>" tag in XML Schemas


xml any tag
Is it perhaps because although <xs:element ref="SomeOtherChild"/> is not
in a ##other namespace, an element in the substitution group of
SomeOtherChild might be?

Michael Kay

> -----Original Message-----
> From: Paul Spencer [mailto:xml-dev@b...] 
> Sent: 10 December 2003 15:39
> To: Strolia-Davis Christopher Contr MSG/MAT
> Cc: xml-dev@l...
> Subject: RE:  MSXML and the "<any>" tag in XML Schemas
> 
> 
> Chris,
> 
> I use xs:any a lot with MSXML, and find that the parser is 
> very good at reporting non-deterministic schemas that result 
> from its incorrect use. This is a good thing :-). Some other 
> parsers do not report these errors, so you might think that 
> MSXML is wrong when it is not. I make it a rule to test all 
> schemas with MSXML for this reason.
> 
> That is the preliminary. These errors result from the parser 
> not being able to tell if an element should be parsed against 
> the xs:any or some other part of the content model. You are 
> therefore playing safe(r) using namespace="##other". However, 
> this will not work if you reference an element from some 
> other namespace in your content model in a way that could 
> still be misconstrued. For example:
> 
>  <xs:element name="MyElement">
>  	<xs:complexType>
>  		<xs:sequence>
>  			<xs:any namespace="##other" 
> minOccurs="0" maxOccurs="unbounded"/>
>  			<xs:element ref="ns:SomeChildElement" 
> minOccurs="1" maxOccurs="1"/>
>  			<xs:element ref="SomeOtherChild"/>
>  		</xs:sequence>
>  	</xs:complexType>
>  </xs:element>
> 
> You don't appear to be doing that, but then it looks as 
> though you have tailored your schema to post it here. Could 
> it be something like that in your real example? Either that, 
> or I have missed something really obvious.
> 
> Regards
> 
> Paul Spencer
> 
> > -----Original Message-----
> > From: Strolia-Davis Christopher Contr MSG/MAT 
> > [mailto:Christopher.Strolia-Davis@w...]
> > Sent: 10 December 2003 15:11
> > To: xml-dev@l...
> > Subject:  MSXML and the "<any>" tag in XML Schemas
> >
> >
> > Hi folks,
> >
> > I'm curious to see if anyone has seen this problem before, 
> and if they 
> > have a fix.
> >
> > I am constrained to using MSXML2.4.0 for my XML schema validating 
> > needs.
> >
> > I am trying to make my schema extensible with the use of 
> the "<any>" 
> > tag, but I keep getting an error that says that the schema is 
> > non-deterministic.
> >
> > I have tried using the namespace="##other" attribute of the "<any>" 
> > tag to try to prevent this, however, this does not seem to work.
> >
> > So far the only thing that seems to work is if I create an 
> element, in 
> > which the "<any>" tag is the only child.
> >
> > If anyone has seen this problem before, and knows how to get around 
> > it, please let me know.
> >
> > ex.
> >
> > <xs:element name="MyElement">
> > 	<xs:complexType>
> > 		<xs:sequence>
> > 			<xs:any namespace="##other" 
> minOccurs="0" maxOccurs="unbounded"/>
> > 			<xs:element ref="SomeChildElement"
> > minOccurs="1" maxOccurs="1"/>
> > 			<xs:element ref="SomeOtherChild"/>
> > 		</xs:sequence>
> > 	</xs:complexType>
> > </xs:element>
> >
> > thanx in advance for your help.
> >
> > Chris Strolia-Davis
> > Database Specialist
> > Contractor - CDO Technologies Inc.
> >
> > -----------------------------------------------------------------
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> >
> 
> 
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