def namespace(self):
        """
        Return the Namespace URI (if any) as a String for the current tag
        """
        if self.m_name == -1 or (self.m_event != const.START_TAG and self.m_event != const.END_TAG):
            return u''

        # No Namespace
        if self.m_namespaceUri == 0xFFFFFFFF:
            return u''

        return self.sb[self.m_namespaceUri]
Return the Namespace URI (if any) as a String for the current tag