Specifies kinds of information returned by IG_mpi_info_get function.
| IG_MP_ASSOCIATION_TYPE | The value returned is the association type of the given multi-page image. |
| IG_MP_OPEN_MODE | The value returned is the open mode of the associated file. |
| IG_MP_FILE_NAME | The value returned is the name of the associated file. |
| IG_MP_MEMBUFFER_PTR | The value returned is the pointer to the memory associated with the multi-page image. |
| IG_MP_MEMBUFFER_SIZE | The value returned is the size of the associated memory. |
| IG_MP_FORMAT | The value returned is the file format of the multi-page document. One of the enumIGFormats values. |
| IG_MP_DOCUMENT | The value returned is the Native document associated with the multi-page document. |