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   RE: Locating schemas (was Re: Irony heaped on irony)

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  • From: Leigh Dodds <ldodds@ingenta.com>
  • To: xml-dev@xml.org
  • Date: Mon, 22 May 2000 20:14:05 +0100

> -----Original Message-----
> From: owner-xml-dev@xml.org [mailto:owner-xml-dev@xml.org]On Behalf Of
> David E. Cleary
> Sent: 22 May 2000 17:13
> To: xml-dev@xml.org
> Subject: RE: Locating schemas (was Re: Irony heaped on irony)
> > Being able to "install" a schema locally would be extremely useful.
> >
> > We just need to define how we want the software to "know" where
> > to find the schema. The obvious solution to me is a catalog/packaging
> > based system.
> I see no reason why installing and retrieving schemas locally needs to be
> standardized. This is entirely up to the application, and interoperability
> isn't an issue here.

I disagree.

> For instance, I may want to annotate a standard schema with non-native
> to help my application convert an XML instance to my application's native
data format.
> How my application stores and retrieves this annotated schema has no
effect on any
> other parts of a distributed system.

How *your* application stores and retrieves an annotated schema isn't
the issue.

But if you have n different XML-based applications in your system
(e.g. XML browser, >1 XML parser, etc) then you could end up having to
n different copies of your annotated schema just so you can ensure that each
application can retrieve them from wherever their particular config quirks

The issue isn't so much a technical one, nor indeed is interoperability
(you're not exchanging data with anyone). The me is issue about usability.

Its like caching - the more apps that use the cache, the better the quality
reuse (of retrieved resources) you're going to achieve. And you only have to
maintain a single cache.

Still, this is all just IMHO.


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