Modifying XML Instance Document From A Schema Validation

All:

This might be a silly newbie question, but do the XML schema parsers update
a given XML instance document with its thrown exceptions?

For example, if an instance document is parsed and fails validation, can
something defined within the XSD modify the XML to include these exceptions.

I'm trying to avoid writting an external exception handler that will update
the XML so that it can be passed back through the XSL for presentation
purposes.
I'd prefer for the XSD to validate, raise the exception, update the XML and
return the XML result.

Thanks, Dave