Schema-validation bug

[Keith L. Musser]

We have discovered an inconsistency between "Xerces-Java 2.0.0" and "Xerces C++ 2.1" 
with regard to schema validation.  I believe "Xerces-Java 2.0.0" is handling this 
correctly, but I don't claim expertise in the intricacies of XML schema, so I'll let 
you decide.

Below is a schema and a document.  This document is deemed "schema-valid" under 
"Xerces-Java 2.0.0", but gets the error message "Message: No character data is allowed 
by content model" under "Xerces C++ 2.1".  (It appears to be prohibiting whitespace in 
a nested instance of a complex element type.)

I would like someone to confirm that that this is a problem with Xerces-C.  If you 
agree, I can post it to Bugzilla.

Thanks,
-- Keith

THE DOCUMENT IS:
================
<?xml version="1.0" encoding="UTF-8"?>
<base_elem xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
     xmlns="simple_namespace">

     <a xsi:type="a_type">
        <d_type xsi:type="a_type">
            <d_type/>
        </d_type>
    </a>
    <b/>
</base_elem>

THE SCHEMA IS:
================
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="simple_namespace"
   xmlns="http://www.w3.org/2001/XMLSchema";
   xmlns:s="simple_namespace"
   elementFormDefault="qualified">

<complexType name="d_type"/>
<complexType name="a_type">
  <complexContent>
   <extension base="s:d_type">
    <sequence>
     <element name="d_type" type="s:d_type">
     </element>
    </sequence>
   </extension>
  </complexContent>
</complexType>

<element name="base_elem">
  <complexType>
   <complexContent>
    <extension base="s:d_type">
     <sequence>
      <element name="a" type="s:d_type"/>
      <element name="b" type="s:d_type"/>
     </sequence>
    </extension>
   </complexContent>
  </complexType>
</element>
</schema>






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