| Code | Name | Description | # chars |
|---|---|---|---|
| can | Canonical | The mapping is canonical | 13232 |
| com | Compat | Otherwise unspecified compatibility character | 720 |
| enc | Circle | Encircled form | 240 |
| fin | Final | Final presentation form (Arabic) | 240 |
| font | Font | Font variant (for example, a blackletter form) | 1184 |
| fra | Fraction | Vulgar fraction form | 20 |
| init | Initial | Initial presentation form (Arabic) | 171 |
| iso | Isolated | Isolated presentation form (Arabic) | 238 |
| med | Medial | Medial presentation form (Arabic) | 82 |
| nar | Narrow | Narrow (or hankaku) compatibility character | 122 |
| nb | Nobreak | No-break version of a space or hyphen | 5 |
| none | None | 111343 | |
| sml | Small | Small variant form (CNS compatibility) | 26 |
| sqr | Square | CJK squared font variant | 285 |
| sub | Sub | Subscript form | 38 |
| sup | Super | Superscript form | 152 |
| vert | Vertical | Vertical layout presentation form | 35 |
| wide | Wide | Wide (or zenkaku) compatibility character | 104 |
