Vocab AND Ontology?

[Rob Seaman]

Hi Ed,

I don't want to get too metaphysical, but that is literally the  
discussion we're having - talking about talking about physical reality.

> It is a list of terms used by astronomers in astronomy and  
> point_source is about as commonly used as they get (except for  
> maybe "galaxy" and "star")

This project has turned into a mosh pit for any and all terms an  
astronomer might use.  The VOEvent discussion about "concepts"  
started much more narrowly.  A VOEvent packet is intended to describe  
an event on the celestial sphere (or on the disk of the Sun or other  
astro neighborhoods) with the intent of supporting a structured  
conversation involving hypotheses about assertions of inferences  
regarding the "true" nature of the objects and processes involved.   
The first part of that deals with ideas like "point sources".  The  
second part involves things like "stars".

Rob