Re: [Wikidata] Mapping Wikidata to other ontologies

Hello Maarten, We do Semantic SEO so we heavily rely on the schema.org vocabulary. We're using a SPARQL approach, our input parameter is a DBpedia URI which we use to retrieve schema.org types and properties using the following properties chains: * wdt:P31* (instance of) /wdt:P279* (subclass of)

Re: [Wikidata] Mapping Wikidata to other ontologies

Hi Maarten, On 9/22/18 13:28, Maarten Dammers wrote: The equivalent property and equivalent class are used, but not that much. Did anyone already try a structured approach with reporting? I'm considering parsing popular ontology descriptions and producing reports of what is linked to what so

Re: [Wikidata] Mapping Wikidata to other ontologies

I think probably a distinction can be made in terms of whether your use case involves exporting items into other ontologies, versus importing items from other ontologies into wikidata. You'll have different issues with granularity in either direction and they may not be entirely symmetrical, so

Re: [Wikidata] Mapping Wikidata to other ontologies

Hi! > That's one way of linking up, but another way is using equivalent > property ( https://www.wikidata.org/wiki/Property:P1628 ) and equivalent > class ( https://www.wikidata.org/wiki/Property:P1709 ). See for example It is technically possible to add values for P1628 into RDF export.

Re: [Wikidata] Mapping Wikidata to other ontologies

I would also agree with this. In my opinion P2888 should only be used as a last resort. If possible, it's usually a much better idea to use a specific external-id property for the external database -- it gives us better organisation, it's more obvious on the page, and it's much more

Re: [Wikidata] Mapping Wikidata to other ontologies

Hi: Why did you use exact match (P2888) instead of equivalent class (P1709) and equivalent property (P1628)? peter On 9/22/18 5:07 AM, Andra Waagmeester wrote: > Hi Maarten, > >     We are actively mapping to other ontologies using the exact match P2888 > property. The disease ontology is one

Re: [Wikidata] Mapping Wikidata to other ontologies

@Andra Waagmester: I am a little disconcerted by the property P288 "exact match" . I see it is mostly used to link entities, not properties, and I can't figure out how it differs from an external id (unless it's just a convenient way of linking

Re: [Wikidata] Mapping Wikidata to other ontologies

It is indeed helpful to link the Wikidata ontologies to other ontologies, particularly ones like the DBpedia ontology and the schema.org ontology. There are already quite a few links from the Wikidata ontology to several other ontologies, using the Wikidata equivalent class and property

Re: [Wikidata] Mapping Wikidata to other ontologies

Interesting. I am very interested in this topic. Is there a page on Wikidata where all this information is collected? One day I read about the disease ontology mentioned by Andra Waagmeester. But I don't know where I can track the progress of the mapping, not only to the disease ontology. Thanks

Re: [Wikidata] Mapping Wikidata to other ontologies

Maarten Dammers, 22/09/2018 14:28: What ontologies are important because these are used a lot? Some of the ones I came across: * https://www.w3.org/2009/08/skos-reference/skos.html * http://xmlns.com/foaf/spec/ * http://schema.org/ Since 2016 there was some progress:

Re: [Wikidata] Mapping Wikidata to other ontologies

Hi Maarten, We are actively mapping to other ontologies using the exact match P2888 property. The disease ontology is one example which is actively synchronized in Wikidata using the exact match property (P2888). This property is inspired by the SKOS:exact match property. SKOS it self had

Re: [Wikidata] Mapping Wikidata to other ontologies

Hi, I fully agree on the usefulness of this mapping. Out of 5311 properties, only 232 have equivalents in other schemes