On 10/8/16 5:04 PM, Thad Guidry wrote:
Class mappings are almost complete Kingsley. We were trying to get Wikidata to the point where it is easy for folks to do trivial queries right inside WDQS as part of WD Goals for 2016.
Thad,
Here is a post (brought up to date in last day) that demonstrates owl:equivalentClass reasoning and inference. Once I have a link to the new mappings I will integrate into this demo.
Note, this particular LOD Cloud Cache instance has 30 Billion+ triples against which the owl:equivalentClass inference is being applied, at query evaluation time.
[1] http://kidehen.blogspot.com/2014/02/class-equivalence-based-reasoning.html
Kingsley_______________________________________________
On Sat, Oct 8, 2016, 2:38 PM Kingsley Idehen <kidehen@openlinksw.com> wrote:
On 10/6/16 2:57 PM, Thad Guidry wrote:
Hello team :)
So while I'm helping with the Wikidata - Schema.org mappings, a request came in to expose subcategories of an existing Wikipedia category.
For example, say I start with this topic: https://www.wikidata.org/wiki/Q27119725 Parking facilities
The topic's main category is shown as "Category:Parking facilities" and that has links to Wikipedia, specifically a Wikipedia category link, and where the WP category page has subcategories that I would like to expose somehow in whichever way is easiest currently with our tools, apis, etc.
Can it all be done in SPARQL against some services that already expose WP subcategories given a specific category ? Or is there an API that does this already ? other tools that might expose WP categories ?
The IDEAL GOAL is to query 'equivalent class' = schema.org/ParkingFacility and get back the WP categories in one shot or query or api call.
Any gurus ?
_______________________________________________Hi Thad,
If there are owl:equivalentClass mappings in some Linked Data Space, and the SPARQL service associated with said Data Space supports owl:equivalentClass reasoning, then the answer to your question is yes.
What unknown right now is the class mappings between Wikidata and Schema.org. If a dump of those exist, the rest is trivial :)
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-- Regards, Kingsley Idehen Founder & CEO OpenLink Software (Home Page: http://www.openlinksw.com) Weblogs (Blogs): Legacy Blog: http://www.openlinksw.com/blog/~kidehen/ Blogspot Blog: http://kidehen.blogspot.com Medium Blog: https://medium.com/@kidehen Profile Pages: Pinterest: https://www.pinterest.com/kidehen/ Quora: https://www.quora.com/profile/Kingsley-Uyi-Idehen Twitter: https://twitter.com/kidehen Google+: https://plus.google.com/+KingsleyIdehen/about LinkedIn: http://www.linkedin.com/in/kidehen Web Identities (WebID): Personal: http://kingsley.idehen.net/dataspace/person/kidehen#this : http://id.myopenlink.net/DAV/home/KingsleyUyiIdehen/Public/kingsley.ttl#this
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