Apiman is made up of a number of different components, many of which can be configured to use different implementations and/or providers.
When downloading and installing Apiman, the default distribution includes reasonable default values, but you can pick-and-choose components to match your needs.
The API Gateway includes a registry that stores the published API and Client App information.
This registry is updated whenever a user publishes an API (or registers a Client App) from the Apiman Manager.
The registry contains only the information necessary for the API Gateway to apply the configured policies to requests transiting the gateway .