UCD question: how to specify reference to a flat field image?

[Frederic V. Hessman]

Don't forget

	ivoat:flatField + ivoat:image

(have to choose format: RDF/XML,N3,Turtle,....), assuming that "file"  
was really supposed to mean "image".

Rick

> Perhaps we can be pragmatic here by asking how this UCD is being  
> interpreted. I suggest that the code will look at the list of  
> parameters or table columns, and check if any UCD contains the  
> substring "obs.calib.flat". It will then take the associated  
> (string) value and see if it starts with http:// or file:// or if  
> that string is a file name it can open.
>
> In other words, any UCD you like, so long as it has obs.calib.flat  
> somewhere in it.
>
> >>>>> How does one specify "a flat-field calibration file" using
>
> >>>>> UCD 1.23?