Hi,
[For what it's worth, I'm the developer of the UDUNITS package.]
I agree with Jonathan and Roy: units should not have
additional semantics attached to them. This is consonant
with recommendations by ISO and NIST (see section 7.4 of
<
http://physics.nist.gov/Pubs/SP811/sec07.html>, for example).
If the concern is about preventing one from meaninglessly adding
dimensionless quantities together (e.g., molality and plane angle),
then this is more properly addressed in a package dealing with physical
quantities rather than in a package dealing with units of physical
quantities.
Just my two cents worth (although I have thought about this a lot).
Regards,
Steve Emmerson
Received on Tue Oct 10 2006 - 14:41:15 BST
