On Fri, Jul 1, 2016 at 1:22 PM, Yuri Astrakhan yastrakhan@wikimedia.org wrote:
Simone, I think it was a mistake to add P402 to wikidata. From what I have been told, OSM IDs change too frequently to be reliable, e.g when user edits a road and splits some part of it with a different subset of tags. (Haven't tested it myself)
what you are referring to can be applied to roads and POIs, relations tend to differ (from a real world usage point-of-view)
as far as border (administrative) relations are concerned, they tend to stick around longer. 95% ot the borders in OSM (in Italy at least) have been around since when I uploaded them 7 years ago, they have been updated, but they kept the original ID.
as a representative example, have a look at the one for Pavia: https://www.openstreetmap.org/relation/44383
The reverse tagging is by far more valuable, but at the moment OSM editor does not make it easy -- there is no lookup or autocomplete when entering wikidata ID, and when entered, it shows as a number, not as text from wikidata label.
iD has been enabled for wikidata lookup and I would like to go forward and do a mass import of wikidata items references to OSM (in italy).