UCD in the VO registry

[Roy Williams]

> Hang on, so you *do* want to put column information in the registry??

You caught me. Frankly, it depends on the day of the week. There are some
people in NVO who really don't like the idea, I'm not sure why.

As Tony says, anyone can put extra stuff in their own registry, but the IVOA
agreement is about what is the basic level that every registry will be able
to do. Putting in VOTable headers seems particularly easy technically,
because the schema is already in there with the distribution. However, it is
there not so you can register tables, but because some services (Cone, SIAP)
have VOTable as a response.

> a common way of describing mag/flux, and
> possibly two or three other terms would probably be sufficient
> for 90% of queries...

The UCD group is looking particularly at the most common types of UCD. These
are Error (9268 columns), Record (8937 columns), ID_main (5468 columns), and
Note (4517 columns). But somehow I don't think you are searching for tables
that have a "Note" attribute!

Roy

PS sorry I called you an XML junkie