[Therion] group endgroup pairs do not constrain metadata to just the grouped shots

[Bruce Mutton]

The Therion Book says that group/endgroup pairs enable the user to make
temporary changes in almost any setting (calibrate, units, sd, data,
flags...)

 

This is not in practice the case for date, team, explo-date, explo-team, and
is described in https://github.com/therion/therion/issues/131 

What actually happens is that these entries are applied to ALL of the shots
within the centreline (as far as any outputs report), so they are not
'temporary changes'.  In other words, the effect is the same if the
group/endgroup statements are omitted.  At least as far as I can tell with
limited testing.

 

If the presence of the group/endgroup has no effect for the above, what
about calibrate, units, sd, etc?

 

I suggest Therion should throw a warning or error if settings or metadata
applied in a group block will effectively apply to all shots in that
centreline.

 

Thoughts?

Bruce

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