Registration opening for May 2009 IVOA Interop meeting

[Frederic V. Hessman]

Or
	<Why>
		<concept ucd="dunno;question.huh;does.not.fit" term="http://www.ivoa.net/rdf/Vocabularies/IVOAT#TypeIaSupernova 
">It is a bit bright in the blue - some contamination or really Type  
II?  Spectra anyone?</concept>
	</Why>

so the previous work using UCD's can be kept going in the same fashion  
for a while - pick and choose for now.

Params are great for background info, and the "classname" of the  
concept is pretty backgroundish, so here _EVEN_I_  don't have any  
problems with params, and not just to make Roy feel happy.

Rick

>> Choose between:
>
> <Why>
> <concept>http://www.ivoa.net/rdf/Vocabularies/AAkeys#StarsSupernovaeGeneral 
> </concept>
> <concept>http://www.ivoa.net/rdf/Vocabularies/IAUT93#Supernovas</ 
> concept>
> </Why>
>
> or
>
> <Why>
> <concept term='http://...'/>
> <concept term='http://...'/>
> </Why>
>
> If you want to let this contain free text as well, then you could  
> permit free-text keywords in the element content, and vocabulary  
> terms in a reserved attribute.
>
>> How do I say, "this is a supernova type Ia"?  What sorts of  
>> semantic assertions are required or desirable for VOEvent packets?   
>> How are these represented?  (Somebody say something quick before  
>> Roy tells us to stuff it into a Param!)
>
> Those terms above are the most specific ones I could find in the A&A  
> and IAU93 thesauri.
>
> If you want more specific terms, you can develop a thesaurus  
> yourself, and make broaderMatch links to these terms.
>
> I've been in touch with Rick (and Franck Le Petit and Matthew) about  
> hosting the collaborative development of such a thesaurus, which is  
> only waiting on a surfeit of free time (or someone's PhD student) to  
> bring that hosting about.