# RRI - Introduction and Access Requirements

Why RRI?

The RRI interface, which was developed in 2004, offers all the advantages of a realtime registration interface and is able to map all data and processes used at DENIC.

EPP (Extensible Provisioning Protocol (EPP) Transport over TCP) is the standard developed by the Internet Engineering Task Force (IETF) to enable realtime communication between registries and registrars. This standard, in particular the early implementations of it, were not suited for the applications of DENIC. However, the RRI of DENIC includes many elements of the IETF standard.

Access Requirements

The realtime registration system is based on a client/server model. To be allowed access you need to have established a RegAcc profile containing at least all mandatory data and an RRI login.

Transaction Model

A transaction comprises a request and the pertinent response. Competing operations intended for one and the same object will be rejected with an error message.