Define plugfest 2020.10 scenarios for semantic discovery

[mmccool]

See w3c/wot-testing#47
Let's use this issue (and the linked one) to discuss what kinds of use cases exist for semantic discovery and what "demo" scenarios we can target for the plugfest. Assume that we will find some way to add OneDM semantic annotations to a set of TDs (we may have to do that manually), at least for "capabilities", and have a way to import them into a directory. I'm also assuming we will spin up a SPARQL endpoint to do advanced semantic queries, although one thing I think is worth exploring is when "keyword" search is sufficient (eg JSONpath/Xpath) and when we really need the full power of semantic queries (eg SPARQL).

[mmccool]

So we did some of this during the 2020.10 plugfest, including some annotation, but suggest closing this issue since the plugfest is now done.

[mmccool]

Going to close this, but I think we do need a good set of semantic query examples and use cases (eg late binding...) in the actual Discovery document.

[mmccool]

Close, replace with #81