| Name | Format | Description |
| sepdata | sep_type | The name of the dataset. |
| n_keys | integer | The number of header keys. |
| name | character(len=*) array(n_keys) | Array with key names. |
| format | character(len=*) array(n_keys) | Array with key formats. |
| type | character(len=*) array(n_keys) | Array with key types. |