UTYPES

[Alberto Micol]

If I get you correctly, Frames holds all the necessary info.
Are you saying that we do NOT need UTYPES at all?

Alberto




>Alberto,
>
>
>>> I think we have to really clarify the different roles of UCDs and UTYPEs.
>>> (well, if not everybody, at least *I* do need it).
>
>
>And me!
>
>
>>> It looks to me that many people even on the DM list think that UCDs
>>> are a DM thing, used to refer to complex concepts.
>>>
>>> For me UCDs are solely a controlled dictionary of basic words,
>>> while UTYPEs are a way to map to higher level concepts.
>
>
>Within the context of Quantity, I think UCDs should be simple basic words.
>All the extra complication shluld be held within the Frames inside the
>Quantity.
>
>
>>> For what I just said, and as opposed to my previous email
>>> ( http://www.ivoa.net/forum/dm/0456.htm ),
>>> I just figured out it is probably correct not to mention UTYPEs in the
>>> Q-DM, since Q holds very simple information.
>
>
>I see the Frames as holding the complex information, one component of
>which is a simple UCD for each axis in the Frame.
>
>David


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