Table 1 A summary of the ontologies that have been identified as covering content areas of relevance for eNanoMapper

NanoParticle Ontology (NPO), [5]

http://bioportal.bioontology.org/ontologies/NPO

Nanomaterial types, properties and experiments

Chemical Entities of Biological Interest (ChEBI), [6]

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

Chemical compounds, groups and roles, and nanomaterial types

Chemical information ontology (CHEMINF), [7]

http://code.google.com/p/semanticchemistry/

Chemical qualities and descriptors, both calculated and measured

Chemical Methods Ontology (CHMO)

http://purl.bioontology.org/ontology/CHMO

Chemical processes and experimental methods

Physico-Chemical Process Ontology (REX)

http: //www.obofoundry.org/cgi-bin/detail.cgi?id=rex

Chemical processes and experimental methods

Unit Ontology (UO), [8]

http://code.google.com/p/unit-ontology/

Units for measured or calculated quantities

Phenotype and Quality Ontology (PATO), [9]

https://code.google.com/p/pato/

Qualities and phenotypes

Ontology for Biomedical Investigations (OBI), [10]

http://obi-ontology.org/

Experiments and assays

BioAssay Ontology (BAO), [11]

http://bioassayontology.org/

Experiments and assays

Gene Ontology (GO), [12]

http://amigo.geneontology.org/

Molecular functions, biological processes and cellular components

Protein Ontology (PRO), [13]

http://pir.georgetown.edu/pro/pro.shtml

Proteins and protein complexes

Cell Ontology (CL), [14]

https://code.google.com/p/cell-ontology/

Cell types

Cell Culture Ontology (CCONT), [15]

http://purl.bioontology.org/ontology/CCONT

Cell lines

UBERON, [16]

http://uberon.org

Multi-species anatomy

Environment Ontology (ENVO), [17]

http://purl.bioontology.org/ontology/ENVO

Environments such as soil and sediment

Ontology of Adverse Events (OAE), [18]

http://purl.bioontology.org/ontology/OAE

Adverse events of a medical nature