Table 1 Namespaces and abbreviations used in the text.

DBpedia

http://www.dbpedia.org/

Ontology of wikipedia entries

DBpedia: A Nucleus for a Web of Open Data

SO [sequence ontology]

http://www.sequenceontology.org/

Ontology of genetic sequences

The Sequence Ontology: a tool for the unification of genome annotations

GO [gene ontology]

http://www.geneontology.org/

Ontology of biological information

Gene ontology: tool for the unification of biology. The Gene Ontology Consortium

Bio2RDF

http://bio2rdf.org/

Converts biological info into RDF

Bio2RDF: Towards a mashup to build bioinformatics knowledge systems

Scenario

http://www.BioSITES.org/scenario

Ontology of the BioSITES terms

Interpro

http://www.ebi.ac.uk/interpro/

Database of protein sequences

InterProScan – an integration platform for the signature-recognition methods in InterPro

ProMed

http://www.ProMedmail.org/

Collection of public health articles

ProMed-mail: An Early Warning System for Emerging Diseases

GeoNames

http://www.geonames.org/

Database of GPS locations around the world

Interlinking Open Data on the Web