| Name | Value | Description |
| kDataObjectMedium | 56578 | Using DataObject as the type of medium data. |
| kFileNameMedium | 56577 | Using file name as the type of medium data. |
| kStreamMedium | 56579 | Using stream as the type of medium data. |
| kStringMedium | 56580 | Using string as the type of medium data. |