| Name | Value | Description |
| kCoincidentInference | 1 | Coincident interferece. |
| kHorizontalInference | 2 | Horizontal Inference. |
| kIntersectionInference | 4 | Intersection Inference. |
| kMidPointInference | 8 | Mid point Inference. |
| kOnCurveInference | 16 | On curve Inference. |
| kParallelInference | 32 | Parallel Inference. |
| kPerpendicularInference | 64 | Perpendicular Inference. |
| kTangentInference | 128 | Tangent Inference. |
| kVerticalInference | 256 | Vertical Inference. |