| Constant | Type | Value |
| wr 4D Write document | String | 4WR7 |
| wr 4D Write template | String | 4WT7 |
| wr HTML 3 document | String | HTM3 |
| wr HTML 4 document | String | HTML |
| wr Macintosh text document | String | ASCM |
| wr RTF document | String | RTF |
| wr unicode document UTF16 | String | ASCU |
| wr unicode document UTF8 | String | ASC8 |
| wr Windows text document | String | ASCW |