Ontology: Add potential energy

[stap-m]

Description of the issue

• Add potential energy as subclass of energy
• Include general class axiom for energy carrier disposition

Ideas of solution

...

Workflow checklist

• [ ] I discussed the issue with someone else than me before working on a solution
• [ ] I already read the latest version of the workflow for this repository
• [ ] 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]

Is there a reason why this issue is still open despite PR #627 was merged?

[sfluegel05]

PR #627 didn't implement potential energy, but just mentioned that this has to be done.

[stap-m]

A first suggestion inspired by this source:
_Potential energy is the energy that an object contains due to its position relative to other objects or stresses within itself._
Is the reference to object correct, e.g. for a body of water in a storage lake? Or shoud it rather be a material entity? @sfluegel05

[l-emele]

I am fine with your suggestion with using material entity.

[sfluegel05]

I would also prefer material entity. We already have energy carriers like dammed water and pumped water, which are object aggregates (and with that not objects) and which are good candidates for carriers of potential energy.

[stap-m]

_Potential energy is the energy that a material entity contains due to its position relative to other material entities or to stresses within itself._

[stap-m]

Can this be implemented?

[l-emele]

I think so.