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Reads and understands high-level descriptions of the classes and properties of a dataset in order to write queries.

Wikidata and Authority Control

This video discuss Wikidata's pivotal role in bolstering authority control in Wikipedia through automated interactions with VIAF and other international authority files. Also includes a [...]

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By |January 16th, 2017|Comments Off on Wikidata and Authority Control

An Introduction to Wikidata

Describes Wikidata, a "free and open knowledge base" which houses the data formerly located at Google's Freebase. Discusses how Wikidata is well-placed to solve data [...]

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By |January 16th, 2017|Comments Off on An Introduction to Wikidata

Ordnance Survey Linked Data: Combining Postcode and Spatial Queries

Building on previous blog posts, the author shows how to query and combine data from two different datasets. Although the datasets were published by the [...]

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By |January 15th, 2017|Comments Off on Ordnance Survey Linked Data: Combining Postcode and Spatial Queries

Ordnance Survey Linked Data: A Simple Postcode Query

This blog post shares give some simple examples of what can be done with the Code-Point(R) Open dataset, available as Linked Open Data (LOD). This [...]

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By |January 15th, 2017|Comments Off on Ordnance Survey Linked Data: A Simple Postcode Query

Ordnance Survey Linked Data: A Simple Spatial Query

In this blog post, the author discusses the relative lack of spatial indexes for data in RDF triple stores, compared to data stored in GIS [...]

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By |January 10th, 2017|Comments Off on Ordnance Survey Linked Data: A Simple Spatial Query

Wikidata SPARQL Query Tutorial

This video presentation demonstrates how to construct SPARQL queries simply and easily using the Wikidata Query Service. It works through an example of searching for [...]

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By |December 28th, 2016|Comments Off on Wikidata SPARQL Query Tutorial

DBPedia SPARQL Endpoint Exercises

This slide tutorial teaches the user how to form SPARQL queries to answer various questions of interest and retrieve results from DBpedia's SPARQL endpoint. In [...]

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By |November 23rd, 2016|Comments Off on DBPedia SPARQL Endpoint Exercises

Watch this: Probe the Semantic Web with SPARQL

One thing that is immediately obvious from the triple pattern of SPARQL queries is that harvesting information from the Semantic Web is more complex than [...]

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By |January 16th, 2016|Comments Off on Watch this: Probe the Semantic Web with SPARQL

Querying the Linked Archives Hub data using SPARQL

This blog post provides a few sample SPARQL queries that can be used as a starting point for exploring an unfamiliar dataset. The queries are [...]

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By |January 16th, 2016|Comments Off on Querying the Linked Archives Hub data using SPARQL

Linked Data and SPARQL Queries Tutorial

This tutorial goes through some basic SPARQL queries in order to give the user a sense of how to discover and query different Linked Data [...]

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By |December 30th, 2015|Comments Off on Linked Data and SPARQL Queries Tutorial