| Attribute | Type | Defined By |
|---|
| StartTag | IfcLabel (STRING) | IfcAlignmentParameterSegment |
| EndTag | IfcLabel (STRING) | IfcAlignmentParameterSegment |
| StartPoint | IfcCartesianPoint (ENTITY) | IfcAlignmentHorizontalSegment |
| StartDirection | IfcPlaneAngleMeasure (REAL) | IfcAlignmentHorizontalSegment |
| StartRadiusOfCurvature | IfcLengthMeasure (REAL) | IfcAlignmentHorizontalSegment |
| EndRadiusOfCurvature | IfcLengthMeasure (REAL) | IfcAlignmentHorizontalSegment |
| SegmentLength | IfcNonNegativeLengthMeasure (REAL) | IfcAlignmentHorizontalSegment |
| GravityCenterLineHeight | IfcPositiveLengthMeasure (REAL) | IfcAlignmentHorizontalSegment |
| PredefinedType | IfcAlignmentHorizontalSegmentTypeEnum (ENUM) | IfcAlignmentHorizontalSegment |