Figure 1.

Structure of a BEL statement. This example of a BEL statement describes that an abundance of the chemical corticosteroid reduces the biological process Oxidative Stress. For the identification and disambiguation of domain-specific terms and concepts in BEL pre-defined namespaces, in this example, CHEBI and MESHPP are used. The namespaces CHEBI contains chemical entities from the resource ChEBI (http://www.ebi.ac.uk/chebi/) and MESHPP contains various biological processes from MeSH (http://www.nlm.nih.gov/mesh/) Phenomena and Processes [G] branch.