HP 8753E User Manual page 656

Keywords are always the first word on a new line. They are always one continuous word
without embedded spaces.
A listing of all the keywords used in the latest A.01.01 version of CITIlile is shown in "The
When reading a CITIflle, unrecognized keywords should be ignored. This allows new keywords
to be added, without affecting an older program or instrument that might not use the new
keywords. The older instrument or program can still use the rest of the data in the CITItlle as it
did before. Ignoring unknown keywords allows backwards compatibility to be maintained.
The CITlfile Data Format and Keyword Reference