| Structural Curve Type | T | Structural Curve Type | Integer |
| Boundary End A | A | Boundary End A (IfcNodeBoundaryCondition or Curve Memb End Parameters) | Generic Data |
| Boundary End B | B | Boundary End B (IfcNodeBoundaryCondition or Curve Memb End Parameters) | Generic Data |
| Number of Segments | S | Number of Segments | Integer |
| Low Member ID | M | Lowest acceptable Member ID | Integer |
| Low Point ID | P | Lowest acceptable Point ID | Integer |
| Point Seeking Tolerance | P | Point seeking ToIfcStructuralCurveMemberTypeEnumlerance : Negative to force creation, zero default setting. Member offsets will be generated. | Number |
| Division Curves or points | D | Intermediate elements generated with end points at locations of intersection or point | Geometry |