Bidirectional classes
| Key | Name | Characters |
|---|---|---|
| AL | Arabic Letter | 1478 |
| AN | Arabic Number | 73 |
| B | Paragraph Separator | 7 |
| BN | Boundary Neutral | 181 |
| CS | Common Separator | 15 |
| EN | European Number | 178 |
| ES | European Separator | 12 |
| ET | European Terminator | 78 |
| FSI | First Strong Isolate | 1 |
| L | Left To Right | 147324 |
| LRE | Left To Right Embedding | 1 |
| LRI | Left To Right Isolate | 1 |
| LRO | Left To Right Override | 1 |
| NSM | Nonspacing Mark | 2067 |
| ON | Other Neutral | 6854 |
| Pop Directional Format | 1 | |
| PDI | Pop Directional Isolate | 1 |
| R | Right To Left | 1570 |
| RLE | Right To Left Embedding | 1 |
| RLI | Right To Left Isolate | 1 |
| RLO | Right To Left Override | 1 |
| S | Segment Separator | 3 |
| WS | White Space | 17 |