| Created |
| Associated with Unicode Regular Expressions |
| Associated with Unicode Technical Standard #18 |
| Associated with UTS #18 |
| Associated with Unicode正規表現 |
| Associated with UTS #18: Unicode Regular Expressions |
| Associated with 水準2 |
| Associated with Level |
| Associated with Level 2 |
| Associated with 水準1 |
| Associated with Level 3 |
| Associated with 水準3 |
| Associated with Level 1 |