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Category: code

Read and Write RDF in your Rails apps

by Ric on 05 Mar 2013 in code, learning, linked-data, open-source, publishmydata, rdf, ruby, tripod

As we've long been promising, we've started to release some open source code to help people publish and consume Linked Open Data. The first component that we'd like to talk about is Tripod, an RDF and SPARQL ORM, designed for use in Ruby-on-Rails apps. Read More »

Creating Asynchronous, Embeddable JavaScript Widgets

by Ric on 11 Feb 2013 in code, javascript, learning

We recently worked with DCLG (Department for Communities and Local Govermnent) to produce an online dashboard that enables users to see how the department is performing against key indicators. Read More »

Simple RDF Namespace Lookup

by Bill on 24 Apr 2012 in code, linked-data, rdf

prefix.cc is a very handy little service that I use a lot. If you work with RDF a bit, you get to know the commonly used prefixes for ontology terms, such as rdfs:label, foaf:Person, owl:sameAs etc, but it's rare for me to be able to remember accurately what the full namespace is. Read More »

Understanding RDF serialisation formats

by Ric on 30 Jan 2012 in code, learning, linked-data, rdf

In this article, we'll see how to serialise a graph (i.e. a collection, or set) of RDF triples in different ways, and explore the advantages and disadvantages of each. Read More »

Introduction to RDF

by Ric on 30 Jan 2012 in code, learning, linked-data, rdf

Linked Data is based around describing real world things using RDF. A lot of articles about Linked Data assume you already know what RDF is all about: if you are coming to it for the first time, this article explains the basics. Read More »

SPARQL example: finding data for a postcode

by Bill on 17 Mar 2011 in code, learning, linked-data, rdf, sparql

In this tutorial, we're going to be building and running a query to find the names of all the schools in the London Borough of Brent, but we'll take it one step at a time. The concepts we introduce here should come in useful elsewhere as so much Linked Data is geographically based. Read More »