Datatypes R2 Issue 10
Data Types Issue 10: Create URG constraint on UVP
Introduction
URG means "Uncertain Range".
The use case is that now IVL is used for both ranges where all elements are equally valid and for ranges where only one number would be picked, like when I say "come tomorrow between 10 and 11" and of course you will only enter my door at one point in time between 10 and 11.
? backward compatible.
Discussion
Being a constraint of UVP does not really make sense.
The datatype should best be almost identical with IVL. That way all that changes (particularly in the XML) would be the xsi:type, not anything in the data which people already build and parse today. So, low, center, high, width, etc.
We can say that UVP be a specialization of IVL, which would make it completely backwards compatible.
Logically more correct would be to make it a subtype of PPD.
In my view it should be considered as a confidence interval, and so it should also receive a confidence level, which is almost like a probability (i.e., it is then the same form and almost the same meaning as an UVP<IVL<T>>.)
PPD needs to be fixed also.
--Gschadow 01:20, 25 Jun 2006 (CDT)
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