Re: [Wikidata-l] Disambiguating property [was: Freebase like API with an OUTPUT feature}
||On 2015/01/09 14:50, Lydia Pintscher wrote: On Thu, Jan 8, 2015 at 6:43 PM, Denny Vrandečić vrande...@gmail.com wrote: Actually, since Wikidata allows now properties on properties, one might easily create an item Disambiguating property and then make a claim instance of - Disambiguating property on the relevant property. there is no need for any extra implementation work. And in fact that already exists ;-) See for example https://www.wikidata.org/wiki/Property:P345 We would want to say that https://www.wikidata.org/wiki/Q6545185 unique identifier is that same as http://www.w3.org/2002/07/owl#InverseFunctionalProperty. In this case a property is an instance of unique identifier (not sub property) so that unique identifier is the same class as InverseFunctionalProperty. We already have https://www.wikidata.org/wiki/Property:P1628 equivalent property. Is there an equivalent class? - Jeff ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
Re: [Wikidata-l] [Mediawiki-api] Freebase like API with an OUTPUT feature ?
As I understand it, Freebase explicitly rejected inheritance through subclass relations. Therefore it has no class tree and indirect inheritance. It is flat. Every item has to directly have all the values that pertain to it. Is that right? Wikidata, on the other hand, follows OWL which uses subclasses to form a tree. Therefore, information is indirect and queries need to understand this. If a Property is disambiguating, it can be an instance of an Item which is ultimately a subclass of https://www.wikidata.org/wiki/Q6545185 unique identifier. In a system like Wikidata which allows inheritance, a query needs to follow the tree (unlike Freebase which is flat and you don't follow any inference). It is possible that a query engine can cache the result of such an indirect inference, but the raw database does not need to flatten everything like Freebase. Is that OK? - Jeff On 2015/01/09 16:30, Thad Guidry wrote: So Lydia, Your saying that if I see https://www.wikidata.org/wiki/Q18614948 as a property on another Property... then that is similar to the Freebase disambiguating flag ? In Freebase, we have just one flag but that is not the case here, correct ? Wikidata has (or might have) several such disambiguating flags via the property on Property ? It would be nice, from an API and developer perspective, to not have to discover all those disambiguating propertiesbut have only a master disambiguating property to work with...a single disambiguator flag, just like Freebase has is this possible, where someone can go through an mark all of them as disambiguating ? My hope is that the Wikidata query service could give me nicely formatted output for claims that only contain disambiguating property data just like the Freebase API example URL that I mentioned at the beginning of the thread. So hopefuly you guys are saying that is possible via the property on a Property. Thad +ThadGuidry https://www.google.com/+ThadGuidry ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
Re: [Wikidata-l] WikiData for Research Project Idea: Structured History
The ISO standard for CIDOC CRM is behind a pay wall with a patent notice. Can it be used in an open knowledge system? On 2014-12-29 9:49, Dov Winer wrote: Hi Sam, CIDOC/CRM is the ontology of choice for Structured History as it is anchored on modelling events. An excellent project based on it is the ResearchSpace from the British Museum. See: http://www.researchspace.org/ http://www.researchspace.org/home/rsandcrm http://cidoc-crm.org/ Enjoy, Dov ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
[Wikidata-l] Complete list of properties?
Hello. Is there a way to see an automatically-generated list of properties with their name and data type? (I tried the following page but it doesn't seem to be up-to-date, so that's why I asked if there is an automatically-generated page.) http://www.wikidata.org/wiki/Wikidata:List_of_properties/all Thank you, - Jeff ___ Wikidata-l mailing list Wikidata-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-l
