def _getUniquePrefix(self):
while <NUM_LIT:1>:<EOL><INDENT>self._indx += <NUM_LIT:1><EOL>prefix = '<STR_LIT>' %self._indx<EOL>try:<EOL><INDENT>self._dom.findNamespaceURI(prefix, self._getNode())<EOL><DEDENT>except DOMException as ex:<EOL><INDENT>break<EOL><DEDENT><DEDENT>return prefix<EOL>
I guess we need to resolve all potential prefixes
        because when the current node is attached it copies the 
        namespaces into the parent node.