Ancillary data attached to ISAAC files are all written into FITS headers. The following chapter lists the most important keywords and describes commands on how to retrieve them.
For ease of reading, keywords are shortened from HIERARCH ESO A B C to A.B.C (shortFITS notation).
Notice that all of this information is present in the ESO dictionaries, available from the ESO archive Web site. The following chapter only tries to summarize the most important information.