| Name | Value | Description |
| OneSideFeatureExtentType | 0 | Specifies a feature extent that is defined in a single direction. |
| SymmetricFeatureExtentType | 2 | Specifies a feature extent that is defined symmetrically in two directions. |
| TwoSidesFeatureExtentType | 1 | Specifies a feature extent that is defined in two directions. |