The CCDB dictionary provides definitions for terms and concepts used in the CCDB. Where possible, the CCDB maps these concepts to unique identifiers contained in the Subcellular Anatomy Ontology (SAO) or NeuroLex. Many concepts are also cross referenced to the Unified Medical Language System (UMLS) or other appropriate ontologies. Identifiers beginning with "BF" refer to Bonfire. More information about Bonfire IDs can be found here. Browse some of the hierarchies on the NeuroLex Wiki: Behavioral Activity, Behavioral Paradigms, Brain Regions, Cells, Diseases, Molecules, Nervous System Function, Subcellular Components, Information Resources, Qualities.