| ERROR | XQST0015 - unsupported must-understand extension |
| CAUSE | The XQuery flagger was enabled and the query contained a must-understand extension. |
| ACTION | remove the unsupported must-understand extension. |
| ERROR | XQST0015 - unsupported must-understand extension |
| CAUSE | The XQuery flagger was enabled and the query contained a must-understand extension. |
| ACTION | remove the unsupported must-understand extension. |