| 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 |