sent from a phone
> On 21. Feb 2019, at 21:46, Yuri Astrakhan <[email protected]> wrote: > > Most people won't know/care about licensing or political differences - they > treat both as "wikis" they can contribute to. After all, people are very > happy to contribute even to Google maps despite the data not being public. > So if we are to build better open data, we should encourage as much > collaboration between projects as possible, rather than try to create extra > walls or restrictions. I see some very fundamental differences, on different layers. Wikidata has different criteria what may be added (relevance) and based on what information. If you want to add the non-famous architect of some building to wikidata, you must fear that someone will delete it tomorrow because it is not relevant, only famous architects must be added. In OSM you can tag any architect on a building, as long as she has planned it. The impression I got from wikidata is that it is mostly bots touching the objects, while in OSM we aim at having human mappers performing the individual edits. As everything is defined through other things and properties in wikidata, the resulting complexity cannot be overseen by anybody, so that any edit on object x might break objects y and z. An example? Take “city”, 1.5 years ago it was a subclass of 3 classes: https://www.wikidata.org/w/index.php?title=Q515&oldid=566515920 while now it is a subclass of 5 classes of which only 1 is the same than a few time ago. This means all the cities that are instances of the city class, have “changed” as well with this edit (their wikidata definition has), significantly. It would be as if we changed continuously the meaning of tags (we do it, but not in such a drastic way). It happens with many objects in WD, either they are poorly defined (scarce semantic information and no references for the claims) or they have a whole bunch of properties which permanently change. Cheers, Martin
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