CentraSite is a standards-based registry and repository that enables you to govern the API design life-cycle. You use CentraSite to control design-time events through policies you define. For example, you could define a policy that new APIs must be approved by certain people before being accepted into the registry, and that modifications to APIs in the registry must be approved by certain people before going into production. You can also use policies to define review and approval processes, perform quality assurance tests, and issue alerts when new APIs are submitted or when existing APIs have been modified.