I thought one of the main reasons we are making Wikidata is so that you can update a value there, and then everywhere it is used will be automatically updated. If we find a more precise measurement for the depth of an ocean trench, then I just want to update it on Wikidata, and then every article that references it will be updated. I don't want to have to update it on Wikidata and then go do a null edit on every article that uses that information.
> From: g.m.hagedorn@gmail.com
> Date: Thu, 4 Apr 2013 22:13:24 +0200
> To: wikidata-l@lists.wikimedia.org
> Subject: Re: [Wikidata-l] Page history and properties
>
> > don't see what value we'd gain from storing that extra metadata. Every
> > scenario I can think of where you care about past states of the database is
> > already handled by the compare selected revisions feature.
>
> If that is so simple, can the {{#property:xxx}} call in a wikipedia
> simply resolve to the revision that was valid at the point in time
> equivalent to a given revision? It seem like you say you already have
> the code to do that when creating the wikidata item description.
>
> I disgree that this is an issue for mediawiki core, since it is a
> question of how the Wikidata-specific property function works.
>
> Gregor
>
>
> PS: I admit that Denny has found an example to where an image seems to
> be changing in content on commons, but I still believe this is a rare
> case. Any wiki-statistician that can supply exact number for these
> cases?
>
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