New UCDs for VOEvent please

[Rob Seaman]

This is a timely discussion for the VOEvent folks, but likely 
perplexing for the UCD folks.  The gist of my previous comments was not 
that VOEvent didn't need to wrestle with characterizing coherent 
descriptions for the "hypothesis" section of an event.  The hypothesis 
is the key to fielding a richly useful VOEvent facility.  Rather, I 
question whether a UCD, per se, is the correct way to represent this 
kind of information - clearly itself not a brand new topic for the UCD 
list :-)  It might be that we need to borrow the syntax from UCD's and 
roll our own - or it might be that we just need to pick another 
namespace(s).  Both the VO and the larger astronomical community would 
benefit from wrestling with the issues Rick has raised.  In the mean 
time, Patricio asks a lot of good questions.

Rob Seaman
NOAO