The proposal file has an XML-like format that lays out the relationship between a set of exposures. The layout looks like this:
.. literalinclude:: empty.prop
The file to be converted is put between the <base></base> tags, and if a subarray is needed to be extracted from a full-frame exposure, the name of the subarray can be put between the <subarray></subarray> tags. Finally, the type of exposure can be placed between the <exp_type> </exp_type> tags. The values of EXP_TYPE are:
| MIRI | NIRCAM | NIRSPEC | NIRISS | FGS |
| MIR_IMAGE | NRC_IMAGE | NRS_TASLIT | NIS_IMAGE | FGS_IMAGE |
| MIR_TACQ | NRC_TACQ | NRS_TACQ | NIS_FOCUS | FGS_FOCUS |
| MIR_LYOT | NRC_CORON | NRS_TACONFIRM | NIS_DARK | FGS_SKYFLAT |
| MIR_4QPM | NRC_FOCUS | NRS_CONFIRM | NIS_WFSS | FGS_INTFLAT |
| MIR_LRS-FIXEDSLIT | NRC_DARK | NRS_FIXEDSLIT | ||
| MIR_LRS-SLITLESS | NRC_FLAT | NRS_AUTOWAVECAL | ||
| MIR_MRS | NRS_IFU | |||
| MIR_DARK | NRS_MSA | |||
| MIR_FLAT | NRS_AUTOFLAT | |||
| NRS_DARK | ||||
| NRS_LAMP |
Sections of this file can be replicated to represent, for example, all of the NIRCAM exposures from each of the 10 detectors at a single pointing by just replicating the <detector></detector> blocks.