DO NOT REPLY [Bug 13191] New: - Multiple xsd:imports on the same namespace

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=13191

Multiple xsd:imports on the same namespace

           Summary: Multiple xsd:imports on the same namespace
           Product: Xerces-C++
           Version: Nightly build (please specify the date)
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Validating Parser (Schema) (Xerces 1.5 or up only)
        AssignedTo: xerces-c-dev@xml.apache.org
        ReportedBy: dws@decisionsoft.co.uk


I mentioned this on the mailing list and recieve a postitive response (this is
mainly a paste of that mail).

We have seen some schemas where the definition of a namespace is split
between several schemas, each defining a subset of the namespace. An
example of what I mean is attached:
    
 schemaA.xsd  defines namespaceA, and imports both schemaB.xsd and
 schemaC.xsd into namespaceB. It then defines an element of each of the
 types defined in schemas B and C, in namespaceB.

It appears that xerces ignores the second import, so the type defined in
schemaC.xsd is not available when it is used to define the element.
    
XMLspy, however accepts this use, and validates the instance fine. Also,
the IBM XML Schema quality checker[1], claims there is no error in
schemaA.xsd.

As schemas and namespaces get larger, and more complicated, I expect
this sort of separation to become more and more widespread.

I tested this on the CVS version as of 26/9/2002. Xerces J also suffers from the
same problem.

David

[1] http://www.alphaworks.ibm.com/tech/xmlsqc

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