| ICRSFrame | |
| 1 (Type/Class) | Telescope.Asdf.GWCS |
| 2 (Data Constructor) | Telescope.Asdf.GWCS |
| Identity | |
| 1 (Type/Class) | Telescope.Asdf.GWCS |
| 2 (Data Constructor) | Telescope.Asdf.GWCS |
| identity | Telescope.Asdf.GWCS |
| ignoreComments | Telescope.Fits.Encoding.MegaHeader |
| Image | Telescope.Fits.HDU, Telescope.Fits |
| image | Telescope.Fits.Encoding |
| Index | |
| 1 (Data Constructor) | Telescope.Data.Parser |
| 2 (Type/Class) | Telescope.Asdf.Encoding.File |
| indexAxes | Telescope.Data.Array |
| indexAxesN | Telescope.Data.Array |
| IndexOf | Telescope.Data.DataCube |
| Int16 | Telescope.Asdf.NDArray.Types, Telescope.Asdf.NDArray |
| Int32 | Telescope.Asdf.NDArray.Types, Telescope.Asdf.NDArray |
| Int64 | Telescope.Asdf.NDArray.Types, Telescope.Asdf.NDArray |
| Int8 | Telescope.Asdf.NDArray.Types, Telescope.Asdf.NDArray |
| Integer | |
| 1 (Data Constructor) | Telescope.Asdf.Node, Telescope.Asdf |
| 2 (Data Constructor) | Telescope.Fits.Header.Value, Telescope.Fits.Header, Telescope.Fits |
| Intercept | |
| 1 (Type/Class) | Telescope.Asdf.GWCS |
| 2 (Data Constructor) | Telescope.Asdf.GWCS |
| InvalidReference | Telescope.Asdf.Encoding.Stream |
| InvalidScalar | Telescope.Asdf.Encoding.Stream |
| InvalidScalarTag | Telescope.Asdf.Encoding.Stream |
| InvalidTree | Telescope.Asdf.Encoding.Stream |
| IsBitPix | Telescope.Fits.BitPix |
| isComplexNode | Telescope.Asdf.Encoding.Stream |
| IsDataType | Telescope.Asdf.NDArray.Types, Telescope.Asdf.NDArray |
| isKeyword | Telescope.Fits.Header.Keyword, Telescope.Fits.Header |
| isNDArray | Telescope.Asdf.Encoding.Stream |
| Ix1 | Telescope.Fits |
| Ix2 | Telescope.Fits |
| Ix3 | Telescope.Fits |
| Ix4 | Telescope.Fits |
| Ix5 | Telescope.Fits |