There are two requirements that have become worth consideration. The first is DV_ORDINAL with real values. The second is the ability to have real values with a coded value instead of a unit. At present we have to use proportion and then another element to achieve this. For example to record how much fruit was eaten it would be possible to use a number and the type of fruit as a coded set. It is also possible that such a datatype could be used for ordinals with real values and it needs careful consideration as a DV_CODED_COUNT has identical features to an ordinal.