[fitsbits] EXTEND/NEXTEND reality check

[Thierry Forveille]

Doug Tody a écrit :
> MEF files are an important part of FITS, but unfortunately this issue
> of describing the overall MEF as a structured object has never been
> adequately addressed.  While it may be possible for a MEF to be a random
> collection of FITS extensions that are concatenated together, this is
> not the only model nor necessarily even the best one.  In many applications
> one would like to consider the MEF to be a structured object, and be able
> to add high level information to describe the object, indendent from
> what is stored in the individual extensions.  The most logical place to
> put this information in FITS currently is in the primary header.
> 
> One could easily argue that we need *more* keywords in the primary
> header to properly describe a MEF, not less as seems to be the trend
> of this discussion.
> 
Or one could take the (in my view more logical) view that a MEF file
is the wrong choice when strong structural information needs to be
included :-)