Re: [xml-dev] External subset processing by browsers

[David Carlisle <davidc@nag.co.uk>]

in an SGML Catalog to associate any file with top level element rss with
a dfault DTT you'd just need the line

DOCTYPE rss  some-dtd-with-entity-definitions.dtd

and then a file starting with

<rss>

would act as if it started
<!DOCTYPE RSS SYSTEM "some-dtd-with-entity-definitions.dtd">
<rss>

and you are done so long as the dtd defines the entities you want to
support.

My mental model had XML Catalogues working the same way but looking at
the spec I see that's not quite so, the core XML Catalog spec doesn't
have this feature but it is there as

http://www.oasis-open.org/committees/entity/spec-2001-08-06.html#s.doctype

if your implementation supports

> The elements described in this appendix provide full TR9401 semantics
> in the XML Catalog format. These are implemented as extension elements
> in the namespace: "urn:oasis:names:tc:entity:xmlns:tr9401:catalog". 

So you'd need either an implementation odf sgml open catalogues, or xml
catalogues with this extension, I guess.


David

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