[Aachen]

Fair enough. Not everyone always has time to reiterate Wikipedia on what seems to me a relatively well-known concept, at least among people to whom this is relevant (e.g. me as an OpenStreetMap contributor, database copyright is like the first thing you learn after making your first edit because that's why you can't copy data from just any source). There's always a lucky ten thousand around I suppose :). Maybe I should have at least cited something

[mmooss]

I don't have much interest in Wikipedia, and even then an encyclopedia article doesn't explain what you mean and doesn't apply it to this situation.

Humans don't communicate by exchanging links to reference material.