There is no quantity value for emission factor

[areleu]

Description of the issue

There is a emission quantity value associated to emission value but there is no emission factor value

Ideas of solution

I suggest adding:

efficiency value

emission factor value

emission factor process atribute of some ~~transformation~~ emission emission factor has quantity value some emission factor value

emission factor value: An emission factor value is a quantity value stating the ratio between a process inputs and their emission associated output.

As efficiency value is already a ratio, we don't need to specify the unit of emission factor value

Workflow checklist

• [ ] I discussed the issue with someone else than me before working on a solution
• [x] I already read the latest version of the workflow for this repository
• [x] The goal of this ontology is clear to me

I am aware that

• [ ] every entry in the ontology should have a definition
• [ ] classes should arise from concepts rather than from words

[l-emele]

emission factor process atribute of some transformation

I object against this axiom. Not every transformation is associated with an emission.

[stap-m]

I object against this axiom. Not every transformation is associated with an emission.

Fair engough. But we can specify, which transformations are related, i.e. mainly most of the subclasses of energy transformation.

[l-emele]

There are some subclasses which have an axiom 'causally upstream or within' some emission'. In my view, it would be best if we somehow could infer that all classes that have this axiom also get the axiom 'has process attribute' some 'emission factor'. Can we solve this with a general class axiom?

[areleu]

There are some subclasses which have an axiom 'causally upstream or within' some emission'. In my view, it would be best if we somehow could infer that all classes that have this axiom also get the axiom 'has process attribute' some 'emission factor'. Can we solve this with a general class axiom?

I figured that the 'causally upstream or within' relationship is there, I think this justifies not having the process attribute related to a transforamtion

[l-emele]

emission factor value: An emission factor value is a quantity value stating the ratio between a process inputs and their emission associated output.

A ratio is a dimensionless unit, but emission factor values (at least if some kind of energy transformation is involved) is usually given in units like t/TJ, g/kWh, so the dimension in these cases is mass divided by energy.

[stap-m]

Will this be fixed by #1759?

[l-emele]

Not realy. It is related, but emission factor (value) is something different than an emission value.