Bug in DITA XML Schema and updates for XML catalog.

Hello,

While working with John Hunt and Jeff
Ogden to hammer out some final details for the Learning DTD/XML Schemas(XSDs).
 Jeff discovered a couple of bugs with the XML Schemas.

  1) the attribute outputclass
in the <foreign> and <unknown> is misspelled.

  2) the univ-atts attribute group
the not have @dir attribute defined.

The other issue is related to the current
XML catalog for the XML schemas.  

We are currently using <systemId>
instead of <uri> because Xerces does not properly resolve entries
using <uri>.  There was a bug report opened regarding this issue
a few years back.  See the following Xerces bug report to see the
details. http://issues.apache.org/jira/browse/XERCESJ-1104
(Resolution of schemaLocation URIs should be via URI resolution, not
entity resolution).  Apologies to Eliot if this rehashes some
unpleasant memories. 

 

That being said, we should include <uri>
entries in the XML Catalog for the DITA XSDs, as per the proper interpretation
of the XML Entity Resolution specification with regards to XSDs. Applications
that can properly interpret the specification can resolve the DITA XSDs
appropriately and correctly.  

I propose that the fixes to the XSDs
and the catalog should be approved by the TC and that the errata should
be posted in the TC homepage.

Kind regards,

Eric

Eric A. Sirois

Staff Software Developer 

DB2 Universal Database - Information Development

DITA Migration and Tools Development

IBM Canada Ltd. - Toronto Software Lab

Email: 

Phone:(905) 413-2841

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