1. The Friend of a Friend (FOAF) project, http://www.foaf-project.org/
2. Linking open data on the Semantic Web, http://www.w3.org/wiki/SweoIG/Task-Forces/CommunityProjects/LinkingOpenData
3. MapReduce, A.: major step backwards, http://databasecolumn.vertica.com/database-innovation/mapreduce-a-major-step-backwards/
4. MonetDB, http://www.monetdb.org/
5. Resource Description Framework (RDF), http://www.w3.org/TR/rdf-concepts/