data item data set 2009/10/23 Alan Ruttenberg. The intention is that this term represent collections of like data. So this isn't for, e.g. the whole contents of a cel file, which includes parameters, metadata etc. This is more like java arrays of a certain rather specific type 2014-05-05: Data sets are aggregates and thus must include two or more data items. We have chosen not to add logical axioms to make this restriction. A data item that is an aggregate of other data items of the same type that have something in common. Averages and distributions can be determined for data sets. Intensity values in a CEL file or from multiple CEL files comprise a data set (as opposed to the CEL files themselves). OBI_0000042 data set group:OBI person:Allyson Lister person:Chris Stoeckert pending final vetting