- From: Dare Obasanjo <dareo@microsoft.com>
- Date: Tue, 24 Sep 2002 12:43:08 -0700
- To: "Mark Feblowitz" <mfeblowitz@frictionless.com>, <noah_mendelsohn@us.ibm.com>, "Jeni Tennison" <jeni@jenitennison.com>
- Cc: <Ryan.Barr@ejgallo.com>, <xmlschema-dev@w3.org>, "Michael Rowell (E-mail)" <mrowell@openapplications.org>
When last I looked we ignore multiple imports and pick only the first one for a given namespace. -- PITHY WORDS OF WISDOM Self-made people have an abundance of working parts. This posting is provided "AS IS" with no warranties, and confers no rights. > > > -----Original Message----- > From: Mark Feblowitz [mailto:mfeblowitz@frictionless.com] > Sent: Tuesday, September 24, 2002 12:18 PM > To: 'noah_mendelsohn@us.ibm.com'; Jeni Tennison > Cc: Ryan.Barr@ejgallo.com; xmlschema-dev@w3.org; Michael > Rowell (E-mail) > > > Hmmm. Multiple schemaLocations for a given import are treated > as hints. But are separate schemaLocations in separate > imports for the same namespace also intended to be treated as hints? > > As a practical matter, large namespaces are much more > managable when defined across several, separate files, > especially when users of the definitions from the namespace > need only subsets of the definitions. > > OAGIS 8 has followed this model in implementing its approach > to constructing overlays, building overlyay BODs (business > object documents) by importing only the sets of definitions > that are needed, using separate import statements for each > needed set of definitions. This works fine using all > available parsers. > > I certainly hope that developers of these parsers do not > decide to start treating subsequent import statements as > merely being hints. Then we'd have to build a whole bunch of > adaptors in a big hurry! > > Mark > > > > -----Original Message----- > From: noah_mendelsohn@us.ibm.com [mailto:noah_mendelsohn@us.ibm.com] > Sent: Tuesday, September 24, 2002 9:41 AM > To: Jeni Tennison > Cc: Ryan.Barr@ejgallo.com; xmlschema-dev@w3.org > Subject: Re: Question about xs:import > > > > Actually, I think Jeni's answer is right in practice, but not > in theory (and that's rare, she's usually right all around.) > schemaLocations are hints. So if you have two for a given > namespace in the instance, your schema processor is free to > follow one, the other, both, or neither. In > practice, most processors would follow at most the first. > Furthermore, > it would be illegal to have conflicting definitions or > declarations, so unless you'd carefully written the two > documents to be imported together, it's unlikely that > processing would proceed without error as the second one was > brought in. I don't believe it's strictly an error to put > together schemas for the same namespace from multiple > documents, but any uses I can imagine would be highly > specialized and would be unlikely to be implemented in the > sort of "off the shelf" validators that most of us are using. > Thanks very much. > > ------------------------------------------------------------------ > Noah Mendelsohn Voice: 1-617-693-4036 > IBM Corporation Fax: 1-617-693-8676 > One Rogers Street > Cambridge, MA 02142 > ------------------------------------------------------------------ > > >
Received on Tuesday, 24 September 2002 15:44:52 UTC