Tag: sparql

Wikidata ontological tree of Trains

While looking working on my recent WikiCrowd project I ended up looking at the ontological tree of both Wikidata entities and Wikimedia Commons categories. In this post, I’ll look at some of the ontology mappings that happen between projects, some of the SPARQL that can help you use this ontology in tools, and also some…

By addshore January 7, 2022 0

Using OpenRefine with Wikidata for the first time

I have long known about OpenRefine (previously Google Refine) which is a tool for working with data, manipulating and cleaning it. As of version 3.0 (May 2018), OpenRefine included a Wikidata extension, allowing for extra reconciliation and also editing of Wikidata directly (as far as I understand it). You can find some documentation on this…

By addshore July 7, 2020 2

Your own Wikidata Query Service, with no limits

The Wikidata Query Service allows anyone to use SPARQL to query the continuously evolving data contained within the Wikidata project, currently standing at nearly 65 millions data items (concepts) and over 7000 properties, which translates to roughly 8.4 billion triples. You can find a great write up introducing SPARQL, Wikidata, the query service and what…

By addshore October 23, 2019 14

Geospatial search for Wikidata Query Service

Geospatial search is up and running for the Wikidata Query Service! This allows you to search for items with coordinates that are located within a certain radius or within a bounding box. Along side the the map that can be used to display results for the query service this really is a great tool for…

By addshore May 14, 2016 0

Building applications around Wikidata (a beer example)

Wikidata provides free and open access to entities representing real world concepts.¬†Of course Wikidata is not meant to contain every kind of data, for example beer reviews or product reviews would probably never make it into Wikidata items. However creating an app that is powered by Wikidata & Wikibase to contain beer reviews should be…

By addshore January 8, 2016 0