XSchema Question 3: Internal/External subsets

Simon St.Laurent SimonStL at classic.msn.com
Sat May 30 23:00:46 BST 1998

Peter Murray-Rust wrote:
>There are several concerns.
>     - should we allow DTD subsets and XSchemas to be mixed in a         >    
    document instance (whether delivered externally or internally)
>     - should we allow internal XSchemas (if so, should we use RDF 
>        notation)
>     - should we allow external XSchemas (I assume yes). If so, should 
>        they use RDF?
>     - should we allow internal and external XSchemas to be mixed.

I think the place to start with this - separate from the RDF and DTD 
discussions - is 

Should we allow internal XSchemas?

External XSchemas in some form I think are pretty much mandatory.  If we 
decide that we need internal XSchemas, then we need to decide how to demarcate 
them as schemas _and_ how they interact with external XSchemas.

At this point, I'd say no to internal XSchemas, if only because sorting out 
those details will take a long time and considerable debate.  It would also 
require us to find some way of hiding the internal XSchemas from non-XSchema 
aware processors, something I'm not fond of.

I'll reply to the first issue, mixing DTD subsets and XSchemas, in a separate 
reply regarding Question 4.

Simon St.Laurent
Dynamic HTML: A Primer / XML: A Primer / Cookies

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)

More information about the Xml-dev mailing list