How to do Schema Validation

[Jane Jin \(janej\)]

Hello All,
 
I'm trying to do schema validation on an xml file. I set the following
features:
 
                    parser->setFeature(XMLUni::fgDOMNamespaces, true);
                    parser->setFeature(XMLUni::fgXercesSchema, true);
 
parser->setFeature(XMLUni::fgXercesSchemaFullChecking, true);
                    schema_file = XMLString::transcode("message.xsd");
 
parser->setProperty(XMLUni::fgXercesSchemaExternalNoNameSpaceSchemaLocat
ion, schema_file);
 
parser->setFeature(XMLUni::fgDOMWhitespaceInElementContent, false);
                    // installing error handler
                    parser->setErrorHandler(&handler);
 
But somehow, when I run the program, it seems to be only doing
validation -- i.e. complains about malformatted or mismatched tags. But
it doesn't do full schema validation. For example, in one test case, I
misspell a tag:
 
<badtag>mytest</badtag>
 
In another test case, I put a string as a value to an attribute which
should be an integer specified in schema:
 
<exchange repeat="abcd">
 
where the definition for attribute "repeat" in xsd is:
 
<xs:attribute name="repeat" type="xs:positiveInteger" use="optional"
default="1"/>
 
 
It didn't give error in either case. 
 
Here is the head of my xsd file:
 
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; 
      elementFormDefault="qualified">
 <xs:element name="Message">
...
 
 
The xsd and xml files are correct as I feed both files to another
application written in xerces-j, and it printed errors.
 
Did I miss something in my C++ code? Could anyone shed some lights on
this problem?
 
Thanks,
 
Jane