It almost feels like someone doesn’t want Wikidata in there? Maybe that website is maintained by DBpedia fans? Just thinking out loud here because DBpedia is very popular in the academic world and Wikidata a huge threat for that popularity.
Maarten > Op 4 mei 2018 om 17:20 heeft Denny Vrandečić <[email protected]> het > volgende geschreven: > > I'm pretty sure that Wikidata is doing better than 90% of the current bubbles > in the diagram. > > If they wanted to have Wikidata in the diagram it would have been there > before it was too small to read it. :) > >> On Tue, May 1, 2018 at 7:47 AM Peter F. Patel-Schneider >> <[email protected]> wrote: >> Thanks for the corrections. >> >> So https://www.wikidata.org/entity/Q42 is *the* Wikidata IRI for Douglas >> Adams. Retrieving from this IRI results in a 303 See Other to >> https://www.wikidata.org/wiki/Special:EntityData/Q42, which (I guess) is the >> main IRI for representations of Douglas Adams and other pages with >> information about him. >> >> From https://www.wikidata.org/wiki/Special:EntityData/Q42 content >> negotiation can be used to get the JSON representation (the default), other >> representations including Turtle, and human-readable information. (Well >> actually I'm not sure that this is really correct. It appears that instead >> of directly using content negotiation, another 303 See Other is used to >> provide an IRI for a document in the requested format.) >> >> https://www.wikidata.org/wiki/Special:EntityData/Q42.json and >> https://www.wikidata.org/wiki/Special:EntityData/Q42.ttl are the useful >> machine-readable documents containing the Wikidata information about Douglas >> Adams. Content negotiation is not possible on these pages. >> >> https://www.wikidata.org/wiki/Q42 is the IRI that produces a human-readable >> version of the information about Douglas Adams. Content negotiation is not >> possible on this page, but it does have link rel="alternate" to the >> machine-readable pages. >> >> Strangely this page has a link rel="canonical" to itself. Shouldn't that >> link be to https://www.wikidata.org/entity/Q42? There is a human-visible >> link to this IRI, but there doesn't appear to be any machine-readable link. >> >> RDF links to other IRIs for Douglas Adams are given in RDF pages by >> properties in the wdtn namespace. Many, but not all, identifiers are >> handled this way. (Strangely ISNI (P213) isn't even though it is linked on >> the human-readable page.) >> >> So it looks as if Wikidata can be considered as Linked Open Data but maybe >> some improvements can be made. >> >> >> peter >> >> >> >> On 05/01/2018 01:03 AM, Antoine Zimmermann wrote: >> > On 01/05/2018 03:25, Peter F. Patel-Schneider wrote: >> >> As far as I can tell real IRIs for Wikidata are https URIs. The http IRIs >> >> redirect to https IRIs. >> > >> > That's right. >> > >> >> As far as I can tell no content negotiation is >> >> done. >> > >> > No, you're mistaken. Your tried the URL of a wikipage in your curl command. >> > Those are for human consumption, thus not available in turtle. >> > >> > The "real IRIs" of Wikidata entities are like this: >> > https://www.wikidata.org/entity/Q{NUMBER} >> > >> > However, they 303 redirect to >> > https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER} >> > >> > which is the identifier of a schema:Dataset. Then, if you HTTP GET these >> > URIs, you can content negotiate them to JSON >> > (https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER}.json) or to >> > turtle (https://www.wikidata.org/wiki/Special:EntityData/Q{NUMBER}.ttl). >> > >> > >> > Suprisingly, there is no connection between the entity IRIs and the >> > wikipage >> > URLs. If one was given the IRI of an entity from Wikidata, and had no >> > further information about how Wikidata works, they would not be able to >> > retrieve HTML content about the entity. >> > >> > >> > BTW, I'm not sure the implementation of content negotiation in Wikidata is >> > correct because the server does not tell me the format of the resource to >> > which it redirects (as opposed to what DBpedia does, for instance). >> > >> > >> > --AZ >> >> >> _______________________________________________ >> Wikidata mailing list >> [email protected] >> https://lists.wikimedia.org/mailman/listinfo/wikidata > _______________________________________________ > Wikidata mailing list > [email protected] > https://lists.wikimedia.org/mailman/listinfo/wikidata
_______________________________________________ Wikidata mailing list [email protected] https://lists.wikimedia.org/mailman/listinfo/wikidata
