Table 1.

Definitions of namespace prefixes

Prefix	Definition
rdf:	http://www.w3.org/1999/02/22-rdf-syntax-ns#
rdfs:	http://www.w3.org/2000/01/rdf-schema#
xsd:	http://www.w3.org/2001/XMLSchema#
owl:	http://www.w3.org/2002/07/owl#
bao:	http://www.bioassayontology.org/bao#
bibo:	http://purl.org/ontology/bibo/
bp:	http://www.biopax.org/release/biopax-level3.owl#
cco:	http://rdf.ebi.ac.uk/terms/chembl#
chebix:	http://purl.obolibrary.org/obo/chebi#
cito:	http://purl.org/spar/cito/
cv:	http://nextprot.org/rdf/terminology/
dcterms:	http://purl.org/dc/terms/
fabio:	http://purl.org/spar/fabio/
cheminf:	http://semanticscience.org/resource/
meshv:	http://id.nlm.nih.gov/mesh/vocab#
nextprot:	http://nextprot.org/rdf#
obo:	http://purl.obolibrary.org/obo/
oboInOwl:	http://www.geneontology.org/formats/oboInOwl#
pdbo:	http://rdf.wwpdb.org/schema/pdbx-v40.owl#
rh:	http://rdf.rhea-db.org/
sachem:	http://bioinfo.uochb.cas.cz/rdf/v1.0/sachem#
sio:	http://semanticscience.org/resource/
source:	http://rdf.ncbi.nlm.nih.gov/pubchem/source/
skos:	http://www.w3.org/2004/02/skos/core#
taxon:	http://purl.uniprot.org/taxonomy/
uniprot:	http://purl.uniprot.org/uniprot/
up:	http://www.uniprot.org/core/
vocab:	http://rdf.ncbi.nlm.nih.gov/pubchem/vocabulary#