Re: [Ecrit] Profiles (was: Consensus Call) - namespaces

[Henning Schulzrinne <hgs at cs.columbia.edu>]

The point I'm making is that the namespace identifier is sufficient  
to determine what XML is valid, since you can determine the  
corresponding schema, whether expressed in RelaxNG or XML Schema. We  
are not using DTD.

Thus, I fail to see what this has to do with another label. We don't  
have profile labels in SIP presence, for example, and the problem is  
pretty much the same.

On Apr 25, 2007, at 9:47 AM, Andrew Newton wrote:

> XML validity and XML namespaces are separate features.  XML  
> validity, in the form of DTDs, existed before XML namespaces.  It  
> just so happens that the more modern XML schema languages, such as  
> Relax NG and XML Schema, account for XML namespaces and allow the  
> validity to check the namespace, which wasn't possible with DTDs.
>
> However, validation checking will not solve this problem, as each  
> XML fragment is valid against its schema.  This means such  
> validation must be done by the application.
>
> -andy


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