COMMONS12 — The quantities and units ontology does not allow representation of unitless quantity values

There is a gap in the quantities and units ontology whereby we cannot represent counts of things, which do not necessarily have units, nor can we properly represent ratio values, which may involve scalar quantity values that do not have units. There is also a challenge in representing ratio values more generally, since there is no numeric value representing the ratio on the class.

The issue of unitless measures should be addressed in the context of the work we are doing with tensors and vectors

There is ongoing good work on an ontology for tensors and vectors, with planned revisions for tensor and vector quantities planned for the Commons 1.3 RTF due to the amount of work involved. This issue should be resolved in conjunction with that one in case there are relevant related revisions.