Re: [xml-dev] OASIS catalogs: <system> and <uri> entries

[Jirka Kosek <jirka@kosek.cz>]

On 13.12.2011 18:41, Michael Kay wrote:

> Am I right in thinking that
> 
> (a) there's nothing really in the specs to justify the convention of
> using <system> rather than <uri> for this purpose

Yes, DITA has it clearly wrong.

See
http://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html#s.ext.ent

"External Identifiers, as defined in [Production 75] of [XML], identify
the external subset, entities, and notations of an XML document. They
are not used to identify other resources such as namespace names,
stylesheets, and schema languages other than DTDs; URI entries are used
for that purpose."

> (b) nevertheless, it is established practice, and therefore

Have you noticed it somewhere else then in DITA? Even DITA has
duplicated entries one using <system> and second using <uri>

> (c) the Saxon schema processor ought to work this way?

Please no.

				Jirka

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