I noticed that the catalogs for DITA only list the DTDs. How would schema users handle XSD versioning?
Chris
-----Original Message-----
From: Eliot Kimber [mailto:]
Sent: Thursday, September 01, 2005 4:20 PM
To: DITA-TC (E-mail)
Subject: Re: [dita] Catalogs: embedding version numbers
Chris Wong wrote:
> We might want to embed the version number in the filename too, like
> concept11.dtd. This should bring us in line with other models like
> SVG.
Note that there's no functional difference in XML between an public ID
and a system ID (ignoring that there is a slight difference in how they
are processed in the context of OASIS catalogs, but that doesn't really
change the fact): they are both pointers to a physical resource, as
opposed to a namespace URI, which is a pointer to an abstract thing (the
application).
Thus if people insist on using public IDs then I concur that they should
contain version distinguishers, as should the filenames they map to
(since one is just a synonym for the other, they should have parallel
version distinguishing artifacts).
What there should *NOT* be is version identifiers in DITA-defined
namespaces. That is, there may be many versions or variants of a schema
for a single namespace. The namespace reflects the *application*, as a
thing with a lifecycle represented by many versions of many physical
resources.
Cheers,
Eliot
--
W. Eliot Kimber
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