DO NOT REPLY [Bug 17819] New: - failure to load grammar if an abstract element is in substitutionGroup of another abstract element

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=17819

failure to load grammar if an abstract element is in substitutionGroup of another abstract element

           Summary: failure to load grammar if an abstract element is in
                    substitutionGroup of another abstract element
           Product: Xerces-C++
           Version: 2.2.0
          Platform: PC
               URL: http://www.opengis.net/namespaces/gml/core/feature.xsd
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Critical
          Priority: Other
         Component: Validating Parser (Schema) (Xerces 1.5 or up only)
        AssignedTo: xerces-c-dev@xml.apache.org
        ReportedBy: martin@formicula.fsnet.co.uk


schema parser v2.2.0 chokes on the following lines:

<element name="_Feature" type="gml:AbstractFeatureType" abstract="true" /> 
<element name="_FeatureCollection" type="gml:AbstractFeatureCollectionType" 
abstract="true" substitutionGroup="gml:_Feature" /> 

with the error message:

For '_FeatureCollection' to be a member of the substitution group set 
of 'gml:_Feature', its {abstract} must be false.

schema parser v2.1.0 parsed this without problems.

An abstract element being in the substitutionGroup of another abstract element 
is not forbidden by the schema spec.

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