[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: How could RDDL be distributed ?
- From: Miles Sabin <MSabin@interx.com>
- To: email@example.com
- Date: Tue, 16 Jan 2001 14:57:04 +0000
Eric van der Vlist wrote,
> We can probably learn from recent experiences to give a hint on
> how this could be achieved and I'd suggest that we give the
> possibility to define alternative locations at the 3 places
> where it seems possible to do so (by order of precedence):
> 1) Like it's specified by W3C XML Schema, and like it's the
> case with XSLT, the APIs should allow to define alternative
> locations for the RDDL documents.
> 2) Still like it's the case for W3C XML Schema or XSLT, it
> should be possible to define alternative locations in the
> instance documents.
> 3) It should be possible to define alternate locations in the
> RDDL documents themselves.
> These mirrors locations and the hints to let applications know
> how/when they should use the mirrors might be defined as RDDL
I completely agree the (SAX) entity resolver approach isn't the
way to go (too opaque, too hardwired into code). But I really
don't like the idea of manually splattering XML document
instances with alternative locations either ... simply too hard
to maintain. Not to mention there's a rather serious backwards
compatibility issue: we can't make this work for anything which
doesn't already accomodate alternative URIs, in particular
> The next thing if we'd want to go in this direction would
> probably be to facilitate the management of the replication of
> RDDL documents.
> Things such as a version id and a time to live borrowed from
> DNS systems could be of use.
I think that _this_ is really where we need to start.
> These are just first thoughts about this issue that --unless I
> have missed some exchanges-- doesn't seem to have surfaced yet.
I raised something along these lines here,
And Michael Mealling followed on in a different thread with some
comments on the IETF rescap stuff.
Miles Sabin InterX
Internet Systems Architect 5/6 Glenthorne Mews
+44 (0)20 8817 4030 London, W6 0LJ, England