[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Namespaces and Schemes
"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.
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