1. AllegroGraph RDFStore, 2010, Available from http://agraph.franz.com/allegrograph/.
2. BigOWLIM - OWL Semantic Repository, 2010, Available from http://www.ontotext.com/owlim/big/index.html.
3. Open Provenance Model, 2010, Available from http://openprovenance.org.
4. RuleML: The RuleML Initiative website, 2010, Available from http://www.ruleml.org/.
5. The Gene Ontology, 2010, Available from http://www.geneontology.org.