@Ferminho@maegul This proposal describes a very simple marketplace, and some things were intentionally left out. However, it is based on Valueflows system which can be used to describe many different economic processes, including planning, production and transportation:
So developers may use object types and properties defined there if they want to build something more complicated. And social interactions can be represented as standard ActivityPub activities. I think Valueflows and ActivityPub nicely complement each other.