Index - X
| XDims | Numeric.Dimensions.Dim, Numeric.Dimensions |
| XIdxs | Numeric.Dimensions.Idx, Numeric.Dimensions |
| XN | |
| 1 (Type/Class) | Numeric.Dimensions.Dim, Numeric.Dimensions |
| 2 (Data Constructor) | Numeric.Dimensions.Dim, Numeric.Dimensions |
| XNat | Numeric.Dimensions.Dim, Numeric.Dimensions |