For reference, below is an example of how "Data Object Slot Groupings" (working title) might be applied to the use case model from TVA.

One Observation:  Apart from formulating Groupings using common initial character sequences in slot names, notice that most of these slots have "1 Hr" and "6 Hr" variants.  It's possible that some filtering feature  (based on a slot including a specified substring) -- or a higher level configurable filter -- would also be useful in such a case.

The model file has been put aside here:
R:\doc\openObject\SlotGroups\models\SpecialOps6HourV6.mdl

http://cadswes2.colorado.edu/~philw/2015/OpenObj/DataObjSlotGroups/AnalysisImages/SlotListIllustration.png

http://cadswes2.colorado.edu/~philw/2015/OpenObj/DataObjSlotGroups/AnalysisImages/SpecialOps6HourV6-OpenObj1.png

http://cadswes2.colorado.edu/~philw/2015/OpenObj/DataObjSlotGroups/AnalysisImages/SpecialOps6HourV6-WsExcerpt.png

---