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

[Andrew Newton <andy at hxr.us>]

So you are advocating the creation of a schema that glues the two  
different schemas together, so it can be validated via the XML  
namespace?  If so, ok.  But that is just one step further than a  
profile identifier.

-andy

On Apr 25, 2007, at 11:14 PM, Henning Schulzrinne wrote:

> 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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