Use RelaxNG schema context to validate the document as it
          is processed. Activation is only possible before the first
          Read(). If @ctxt is None, then RelaxNG schema validation is
           deactivated.

def RelaxNGValidateCtxt(self, reader, options):
        """Use RelaxNG schema context to validate the document as it
          is processed. Activation is only possible before the first
          Read(). If @ctxt is None, then RelaxNG schema validation is
           deactivated. """
        if reader is None: reader__o = None
        else: reader__o = reader._o
        ret = libxml2mod.xmlTextReaderRelaxNGValidateCtxt(reader__o, self._o, options)
        return ret