Tag: Wikidata

Testing WDQS Blazegraph data load performance

Toward the end of 2020 I spent some time blackbox testing data load times for WDQS and Blazegraph to try and find out which possible setting tweaks might make things faster. I didn’t come to any major conclusions as part of this effort but will write up the approach and data nonetheless incase it is…

By addshore February 10, 2021 1

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 3

Wikidata Map May – November 2019

This entry is part 13 of 15 in the series Wikidata Map

It’s time for another blog post in my Wikidata map series, this time comparing the item maps that were generated on the 13th May 2019 and 11th November 2019 (roughly 6 months). I’ll again be using Resemble.js to generate a difference image highlighting changed areas in pink, and breakdown the areas that have had the…

By addshore April 21, 2020 1

Covid-19 Wikipedia pageviews, a first look

World events often have a dramatic impact on online services. A past example would be the death of Michael Jackson which brought down Twitter and Wikipedia and made Google believe that they were under attack according to the BBC. Events like the COVID-19 (Coronavirus) pandemic have less instantaneous affect but trends can still be seen…

By addshore March 22, 2020 4

Your own Wikidata Query Service, with no limits

This entry is part 1 of 3 in the series Your own Wikidata Query Service

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 15

Wikidata Map July 2019

This entry is part 12 of 15 in the series Wikidata Map

It’s been another 9 months since my last blog post covering the Wikidata generated geo location maps that I have been tending to for a few years now. Writing this from a hammock, lets see what has noticeably changed in the last 9 months using a visual diff and my pretty reasonable eyes.

By addshore July 2, 2019 4

Wikidata Architecture Overview (diagrams)

Over the years diagrams have appeared in a variety of forms covering various areas of the architecture of Wikidata. Now, as the current tech lead for Wikidata it is my turn. Wikidata has slowly become a more and more complex system, including multiple extensions, services and storage backends. Those of us that work with it…

By addshore December 19, 2018 2