[fitswcs] Dimensional unit analysis (was: WCS Paper III comments)

[David Berry]

Pedro,

> I hope this helps to clarify our approach.

Yes indeed. Thank you.  I can see why you are keen to add a keyword for
storing the dimensions of the CUNIT value. Without it, the FITS reader
has to work out the dimensions itself by parsing the CUNIT string. Not
impossible, but messy - I know from experience!

I have a number of other questions, but I'll read your ADASS presentation
first.

David