UCDs in SpectrumDM

[Andrea Preite Martinez]

Jonathan,

as you have the right to say:

>  I guess I don't feel that
>    phot.flux.density;em.wl,stat.max
>  (and similar) are 'cumbersome' - I find them much easier
>  to understand than extra custom-crafted UCDs like ..perWave.

>  I guess I would like a reason based on the standard that it's not right,
>  rather than just 'Andrea doesn't like it'...

I think I have the same right to say what I said: that, although  
perfectly legal, I see the risk of building a cumbersome expression if  
one adds other qualifiers/modifiers.

>  I'm a bit concerned that you give me all this input now
>  at/after the end of the RFC period, we were hoping to get approval   
> for Spectrum
>  at the July 15 exec - if we need to add all these new UCDs, does this
>  mean we have to wait for a new update to the words list to be approved
>  before Spectrum can go to approval? (Plus, of course, the time required
>  for all the implementers to change their implementation, since   
> we've published
>  essentially the current list of Spectrum UCDs over a year ago and   
> everyone is using
>  them - this mostly is important for the Flux.Value cases).
>
No, my personal point of view is that the DM WG does not have to wait  
for a new update to the word list. Remember that the present version  
of the doc (at pag.23) already proposes some (+ the change of role of  
pos.eq, not yet standard!).
I don't se why the EXEC should not approve a Rec proposing some  
modifications/additions to the current version of another standard:  
btw, they are going to approve Search-by-Cone, where old UCD1 are  
still used, based on a motivation similar to what you are expressing  
above (implementers should change their implementations).

>  I hope other sci-ucd members will comment.
I agree with you!

Andrea


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Andrea Preite Martinez                 andrea.preitemartinez at iasf-roma.inaf.it
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