Add term "market revenue"

[han-f]

Description of the issue

identified in #839

Ideas of solution

market revenue is income from trading at markets

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

[stap-m]

We could classify it as economic value, or is there a subclass that would be even more suitable @han-f ? income is not (yet) part of the OEO...

[han-f]

I think economic value could work for now.

Income in FIBO is: revenue received during a period of time
https://spec.edmcouncil.org/fibo/ontology/FND/Accounting/AccountingEquity/Income

[l-emele]

Maybe we should distinguish between two different concepts:

• The process of getting some money from the market, so a special kind of more generic money transfer process (which we currently do not have).
• A quantity value associated to that process.

But maybe I am just thinking too complicated.

[stap-m]

I don't think we need a money transfer process in the OEO.
FIBO's income def is recursive to our revenue proposal, so net really helpful.
If we just stayed with what we have, it would be:

Market revenue is an econimic value that represents the income from a trade at a market exchange.

[l-emele]

That proposal sounds good from my non-economist view.

[han-f]

Just corrected typo compared to version above: Market revenue is an economic value that represents the income from a trade at a market exchange

[l-emele]

So ready for implementation?