| Data Type | Description |
| I | Adaptive Integer (becomes Python Integer). |
| L | 64-bit integer (becomes Python Long Integer). |
| F | C Float (becomes Python Float). |
| D | C double (is a Python Float). |
| S | C Null terminated string (becomes Python String). |
| B | C array of bytes (becomes Python String). |
| V | Subview. This can be any valid getas statement. All subviews in the same column must have the same structure. |