RE: [xml-dev] UBL 2, W3C Schema extensibility, and multiple

["G. Ken Holman" <gkholman@CraneSoftwrights.com>]

At 2006-05-23 13:55 +0100, Michael Kay wrote:
> > >> > Does ##other imply ##local or does ##other require there be a
> > >> >target  namespace that is different in the particle?  If ##other
> > >> >implies  ##local then Xerces is wrong
>
>My interpretation of this is:
>...
>Clause 2.3 means that the null namespace (.absent.) does not match ##other.
>
>##local matches names that are not namespace-qualified (i.e. names in the
>null namespace).

So, though I do not need it anymore because I have the problem with 
multiple exclusions, the following should *not* have a particle ambiguity:

   <xs:complexType name="any-non-UBL">
     <xs:choice minOccurs="0" maxOccurs="unbounded">
       <xs:any namespace="##other" processContents="skip" 
minOccurs="0" maxOccurs="unbounded"/>
       <xs:any namespace="##local" processContents="skip" 
minOccurs="0" maxOccurs="unbounded"/>
     </xs:choice>
   </xs:complexType>

And Xerces interprets this correctly.

However, for UBL I have to use just:

   <xs:complexType name="extension">
     <xs:sequence>
       <xs:any namespace="##other" processContents="skip"
               minOccurs="0" maxOccurs="unbounded"/>
     </xs:sequence>
   </xs:complexType>

and make it a layered business rule that UBL-namespaced constructs 
(of the four namespaces) are not allowed as immediate children of the 
UBL extension point based on your earlier comment:

At 2006-05-23 13:24 +0100, Michael Kay wrote:
> > Now ... how best to enumerate a *list* of namespaces to be
> > excluded from a content model?
>
>I'm pretty sure you can't do that.
>
>Hence the rule that if two attribute wildcards exclude different namespaces,
>their intersection is "not expressible" (3.10.6)

Third subsection, 5th bullet ... thanks, Mike.  Now I can take this 
to the committee.

. . . . . . . Ken

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