In this document, we refer to 2 concepts in the FITS context:
CALVERS = 'HIFI_CAL_22_0' / HIFI calibration versionwith an 8-characters key, a value, and a comment. In this document, we abusively refer to e.g. ``the card CALVERS'' as ``the value in the card which key is CALVERS''.
META_10 = 62.39999999999999 / [s] HIERARCH key.META_10='integrationTime'i.e. a standard card and a HIERARCH (free-form) line. We can see that these 2 lines provide an indirection through a META_XX key (XX being a non-ambiguous number). In this case, we abusively refer to e.g. ``the metacard integrationTime'' as ``the value in the card which key ( META_10) has the value integrationTime in the associated HIERARCH line''. Thanks to the metacards, case-sensitive keywords not limited to 8 characters can be used. There is also no need to refer to the exact META_XX name in the subsequent specifications, i.e. XX can vary from one file to another.