[fitsbits] versioning vs. schema -- where does it stop?

[Thierry Forveille]

Francois Ochsenbein writes:
 > >I am left wondering whether it is politically possible in the current
 > >environment to create a versioning mechanism for FITS which does not
 > >extend most of the way toward requiring an XML schema definition.
 > >
 > 
 > ===> I was in fact thinking on a really light-weight mechanism --
 >      for instance just a recommendation to include a version
 >      number of smething similar in comment part of the SIMPLE 
 >      keyword if the FITS file potentially makes use of the 64 bit.
 > 
I am afraid that the utility would be limited, with different people
attaching slightly different meanings to the same version number. Or
we'd need a central authority keeping track of what is what, and that
may be more trouble/work that the issue justifies.