| ERROR | attribute use must have its value set to optional |
| CAUSE | If default and use are both present, use must have its value set to optional. |
| ACTION | Remove the default attribute or change the value of the use attribute. |
| ERROR | attribute use must have its value set to optional |
| CAUSE | If default and use are both present, use must have its value set to optional. |
| ACTION | Remove the default attribute or change the value of the use attribute. |