Produce warning if relations and members have same tags

[tumsi]

Tags that cover all members of a relation shall be only stored at the relation and not additionally at its members (e.g., both show up "tag_z=value_c"). Sometimes there can be also observed inconsistent tags (e.g., "tag_x=value_a" at the relation and "tag_x=value_b"). In each case it would be great if JOSM shows up a warning.

[Don-vip]

NodesDuplicatingWayTags test should be renamed and enhanced to support relations.

[Don-vip]

Thanks to r6629 it's even easier :)

[Don-vip]

Mmm not so easy in fact. I tried this, it works, but only if member and parent have the exact same collection of interesting tags, that's not what we want:

relation >:sameTags *:tagged {
  throwWarning: tr("Members duplicating parent relation tags");
}

[Don-vip]

@tumsi: what concrete examples did you have in mind ?

I think we should only detect most common errors (building, landuse, natural).

Currently for multipolygons tagged both on the relation and the outer ways, it raises a "building inside building" or "overlapping xxx" warning, see also #9361

[stoecker]

We totally discourage tags on outer ways now, so that ticket is no longer relevant.