Empty TD element wording

[Mark Taylor]

On Wed, 21 Jun 2006, Clive Page wrote:

> have seen little evidence of need for more than one.  I think it would be 
> more productive to work on a standard way of expressing the notion of 
> upper (or lower) limits - something which is so far missing from most 
> astronomical formats.

VOTable does provide such limits (MIN and MAX subelements of VALUES),
but I don't get the impression they are widely used (I'm afraid none
of my software writes them or does anything with such elements if
they are present).

-- 
Mark Taylor   Astronomical Programmer   Physics, Bristol University, UK
m.b.taylor at bris.ac.uk +44-117-928-8776 http://www.star.bris.ac.uk/~mbt/