Cell Cycle Ontology

CCO IDs

The Cell Cycle Ontology IDs are of the form: CCO:Xnnnnnnn where CCO denotes the namespace for the ontology, X corresponds to the sub-namespace:

C --> Cellular component
F --> Molecular Function
P --> Biological Process
B --> Protein
G --> Gene
I --> Interaction
R --> Reference
T --> Taxon
N --> Instance
U --> Upper Level Ontology (CCO)
L --> Relationship type (e.g. is_a)
Y --> Interaction type
Z --> Unknown/Not defined yet

And, nnnnnnn defines a series of seven unique numbers.

The following table provides several flat files holding the terms versus IDs used within CCO:

OPPL files used in CCO

• cco.oppl
• cco.query.oppl