Indicates whether the summary task bar displays rolled-up bars or whether information on the subtask Gantt bars will be rolled up to the summary task bar.
| Property | Value | 
|---|---|
| Data Type | Boolean | 
| Minimum Occurrences | 0 | 
| Maximum Occurrences | 1 | 
| Default Value | N/A | 
| Abstract | False | 
| Nillable | False | 
| Element Constraints | N/A | 
<Rollup> must be set to True for subtasks to be rolled up to summary tasks.