add more study subclasses

[stap-m]

Description of the issue

For the study factsheet descriptors we need to add the terms:
scenario projection comparison and model intercomparison study

Use case: Describing a (scenario) study that methodologically performs a scenario comparison or model comparison.

See also: OpenEnergyPlatform/oekg#19

Ideas of solution

• A scenario comparison study is a scenario study that methodologically performs a scenario projection comparison.
  • alternative lable: scenario projection comparison study
• A model intercomparison study is a study that methodologically peforms a comparison of several models on behalf of a reference scenario.

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]

I am not sure, what the methodologically part of the definitions means here exacly. I think it is redundant here and I hope, that every study is done methodologically and would rather add the word there (and a respective axiom).

To me, also the second proposed study is a scenario study, as a scenario study can also have a single scenario.

Therefore I propose:

• A scenario comparison study is a scenario study that methodologically performs a scenario projection comparison.
• A model intercomparison study is a scenario study that methodologically performs a comparison of several models on behalf of using a reference scenario.

For the existing study class, I propose the following small modification:

• A study is a project with the goal to methodologically investigate something.
• Add axiom: study SubclassOf: 'has participant' some methodology

[stap-m]

Good, I like the proposals.

[stap-m]

@viktorwichern can you implement?