In context I read that as database client, meaning the application server (which is a client to the database) providing the service to the user. Having that be

In context I read that as database client, meaning the application server (which is a client to the database) providing the service to the user. Having that be able to generate IDs could be useful when needing to refer to the same entity, even if there is data that has to exist in some separate database for some reason.