So the issue is back!
Well I did raise the point about terms like flow and 'flow object' being confusing and likely that someone new to the ontology might have some difficulty in understanding the differences or even use them interchangeably. I looked up the thesaurus and unfortunately I don't think there is anything that sufficiently translates 'object'/'thing'/'entity'. Some suggested words were- 'element', 'substance, 'item' , 'component'.
In my humble opinion- I would like to go back to suggestions as defined in previously published LCA ontology (Kuczenski et al. 2016):
Activity- is a “thing that happens”
Flow- is a “thing in the world that exists because of some instance of an Activity."
Exchange- " An exchange is an established relationship between an activity instance and a flow instance." This can be an input/output/ determining.
I think this terminology is coherent with the vocabulary used by most industrial ecologist.
There is another term that I find slightly problematic is 'Balanceable properties' . As this class primarily consists of certain specific quantities, I was wondering if we could refer to it as 'quantity types' or 'quantity attributes' ?
I will also put this discussion as an issue in out GitHub repo.