<div dir="ltr"><div dir="ltr">On Wed, 11 Sep 2019 at 14:31, Janko Mihelić <<a href="mailto:janjko@gmail.com" target="_blank">janjko@gmail.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>The rule I'm trying to implement, "A Wikidata item cannot be connected to more than one OSM item", might also be interpreted as a DRY rule. But I'm at least proposing part:wikidata, so we can have the benefits of DRY, as well as easiness of tagging WET tags.</div></div></blockquote></div><div class="gmail_quote"><br></div><div class="gmail_quote">I think we have different people understanding this in different ways (or I'm misunderstanding</div><div class="gmail_quote">them).  So this is how I see it...</div><div class="gmail_quote"><br></div><div class="gmail_quote">Firstly, we're talking about Wikipedia's wikidata, and objects are tagged with wikidata=*.</div><div class="gmail_quote">We're not talking about the wikidata OSM's own wiki maintains.  I don't think anybody has</div><div class="gmail_quote">confused the two so far, but at one point I wasn't sure until I re-read a sentence.<br></div><div class="gmail_quote"><br></div><div class="gmail_quote">Rule 1: We only tag terminal instantiations which are unique objects, not categories.</div><div class="gmail_quote">It is appropriate to use wikidata=Q275 for the Forth Railway Bridge; it is not appropriate</div><div class="gmail_quote">to use wikidata=<span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Q8471277 (category railway bridges) for the Forth Railway Bridge.<br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Nor is it appropriate to use wikidata=532 (category village) for a village which does</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">not have its own unique wikidata reference.<br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Rule 2: "Lesser" objects goegraphically within an object that has a wikidata entry do not</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"> inherit that wikidata entry.  If the wikidata entry is for a particular town then objects</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">within the town do not also get that wikidata tag.  My street is within the town</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">of Cardigan but does not get the wikidata tag for Cardigan, nor does a lamp post</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">on that street, nor does my house.  Two reasons: first, it would lead to a massive</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">proliferation of tags; second, an article about Cardigan doesn't tell you about my</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">house or the nearby lamp post.<br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Rule 3: If an object is a multipolygon relation containing several outers, such as some</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">university campuses, then the relation itself gets the wikidata tag for that university,</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">not the constituent polygons.</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Rule 4: For city states it all depends on whether the wikidata item is for the city,</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">the state, or the city state.  In this case I'd be willing to use the same wikidata tag</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">for a city state on two different OSM objects (the city and the country), but others will</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">disagree.<br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">I'm guessing that of all the objections I'm going to get, most will be about rule 3.  Because</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">I can see reasons to have it both ways.  So maybe it's not a rule, just a suggestion.<br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Or maybe I'm missing the whole point of what you're trying to do.  Wouldn't be the first</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">time.</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">-- <br></span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id">Paul</span></span></div><div class="gmail_quote"><span class="gmail-wikibase-title"><span class="gmail-wikibase-title-id"><br></span></span></div></div>