@ilias_: I intentionally tried to do all the edits in a single changeset, but if it is better to make atomic changeset because of… vandalism checks? tile dirtying? something?, no problem.

@Tatti Barletta: Agreed fully, with the caveat that this kind of relation is explicitly discouraged on OSM, AFAICT, see <https://wiki.openstreetmap.org/wiki/Relations_are_not_categories>. I don’t really agree with that, but… it is seems to be a traditional rule.

@Metzor: While I can imagine a tag like “listed_in:url”, I don’t really think it would belong here; you could store a huge list of articles, YouTube videos, etc., mentioning an element. But why would you store that in a map? How would you curate it?
If a Wikipedia list was used as source when editing the map, you can say it in the changelog attributes, but it is not an attribute of the elements themselves, the association is far too weak.