| Label | Explanation | Data Type | 
| Mosaic Dataset
 | The mosaic dataset containing the items to split. | Mosaic Layer | 
| Query Definition
 (Optional) | An SQL expression to select items to split. If the query does not contain any previously merged items, the tool will return an error. | SQL Expression | 
Derived Output
| Label | Explanation | Data Type | 
| Updated Mosaic Dataset | The updated mosaic dataset. | Mosaic Layer |