Oct 30 2019
yes, front page sounds good
Yes that minimal example is the minimum used for Google Dataset Search to have enough info to include a dataset in its collection.
Jul 5 2019
From the quickest of looks (and totally unofficial w.r.t. my employer, of course): I don't see the string "entity" in https://www.wikidata.org/robots.txt so it may not be excluded there
May 16 2017
from a quick look, I wonder whether http://schema.org/about would be a good fit. In most cases you're trying to characterize the topic of the page, aren't you?