| Name | N | Name | Text |
| Origin | O | Origin(0=MEASURED 1=PREDICTED 2=SIMULATED 3=USERDEFINED 4=NOTDEFINED) | Integer |
| Duration Nature | N | Duration Nature(0=ELAPSEDTIME 1=WORKTIME 2=NOTDEFINED) | Integer |
| Duration | D | IfcDuration | Generic Data |
| Sched. Start/Finish Time | S | Scheduled Start/Finish Time | Generic Data |
| Early Start/Finish Time | E | Early Start/Finish Time | Generic Data |
| Late Start/Finish Time | L | Late Start/Finish Time | Generic Data |
| Free Float | F | IfcDuration Free Float | Generic Data |
| Total Float | T | IfcDuration Total Float | Generic Data |
| Is Critical | C | Is Critical | Boolean |
| Actual Duration | D | IfcDuration Actual Duration | Generic Data |
| Actual Start/Finish Time | A | Actual Start/Finish Time | Generic Data |
| Remaining | R | IfcDuration Remaining | Generic Data |
| Completion ratio | C | Completion Ratio 0 to 1 | Number |