Encapsulate an XML parse error or warning.
This exception will include information for locating the error in
the original XML document. Note that although the application will
receive a SAXParseException as the argument to the handlers in the
ErrorHandler interface, the application is not actually required
to raise the exception; instead, it can simply read the
information in it and take a different action.
Since this exception is a subclass of SAXException, it inherits
the ability to wrap another exception.