Ah, Simon, I missed your email before writing mine as it was in a different thread in my client. Sorry.
On Wed, Mar 2, 2016 at 9:47 AM Simon Razniewski <[email protected]> wrote: > Hi Tom, > > Thanks for your message, you are touching upon a very crucial point, the > justification of completeness. For several properties, completeness is > clearly impossible ("SignificantEvent", "Occupation", "AwardsReceived" - > what is significant, what counts as an occupation, and didn't everyone once > win something like the 2nd place in the school chess tournament?). > > Still, for some properties, we believe stating completeness to be > justified, or at least no more unjustified than entering data. Are Malia > and Sasha all children of Obama? To the best of common knowledge yes, and > if we are to doubt this, we might similarly doubt whether Malia is a child > of Obama at all, so stating completeness looks to me no less justified than > stating that Malia is a child of Obama. > > Regarding the other aspect you mention, the time variance of data, the > best we can think of is to qualify completeness statements with an "as-of" > timestamp. > > "Malia and Sasha are all children of Obama, as of 2nd of March, 2016". > > Besides that there may be a portion of well-known history that is not > going to change any more, such as "founders of Apple", "Kings of the > Italian Monarchy", "Participant nations in the 2012 Olympics" and similar, > where time does not play a role. > > Deciding and agreeing for which properties completeness assertions make > sense and for which not would probably require a significant effort by the > domain experts (i.e. you, the Wikidata authors), the above examples are > only guessed. > > Do you know potentially of any guidelines/agreements in Wikidata to decide > which properties ("child") are more well defined, and which ones > ("significantEvent") are not? > > Thanks and best wishes, > Simon > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata >
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