xml-dev - Re: Namespaces and Schemes

[Alan Kennedy <alank@xhaus.com>]

"Simon St.Laurent" wrote:
> 
> At 10:02 AM 11/29/00 +0000, Henry S. Thompson wrote:
> >  The connection between instance and schema can be established in a
> >  number of ways:
> >
> >   1)
> >   2)
> >   3)
> >   4) An application may attempt to dereference namespace URIs and
> >      use schema documents found as a result.
> >
> >   The XML Schema draft spec. does _not_ mandate a particular order
> >   in which these strategies should be followed, if more than one is
> >   supported, but does encourage processors to support all of (2)--(4).
> 
> And just to make the point yet again, lest anyone think Henry's
> word is the final word on this issue, option #4 remains
> controversial and weakly defined.  Applications which expect to be
> able to dereference namespace URIs and find schemas should be
> prepared to be disappointed.  Likewise, developers who rely on
> namespace URIs to point to their schemas shouldn't expect
> applications to necessarily look there.

Proposed connection method #5: The application may wish to use the
namespace URI as a key to a local table (or catalog) which provides
mappings to locations of required schema files, at locations accessible
to the application.


Or maybe not.

Alan.