Posts tagged “SPARQL”

OSS for the Semantic Web: Production Ready?

July 22, 2011 – tagged Linked Data, Open Source, SPARQL

This is the story of how I tried to use Semantic Web technologies, like RDF and Linked Data, to achieve a basically simple task, and of everything that prevented me successfully doing so. #### The Task The very simple task (TM) was: Given the German Wikipedia identifier of an article ...

Escaping strings in SPARQL queries

July 06, 2011 – tagged SPARQL

Resources in the RDF framework are identified by URIs, i.e. strings like http://dbpedia.org/resource/Mathematics. When they contain special characters, some care needs to be taken, when querying, comparing, escaping etc. However, the essence of this post is that when you have a urlencoded string (i.e. one with percent signs in it), ...

Running Joseki from within Jetty

July 06, 2011 – tagged SPARQL, Howto, Ubuntu

Motivation I wanted to set up Joseki, a SPARQL endpoint written in Java, on our database server. Joseki can run standalone (with a script that comes bundled in the distribution) or in a web application server, such as Jetty. As we are already running a Jetty instance for our ...