The EPCglobal Network architecture suggests a role based approach to the various pieces of the architecture. The EPC-IS interface, for example, is used both as an middlware event sink and as a B2B data exchange platform. The three main RadioActive projects fall into three major groups:

Neutrino

The Neutrino project is a set of components used for exchanging EPC related data between enterprises. It includes an implementation of the ONS, EPc-IS and DS (not yet released) standards. Its primary purpose is to communicate higher level "business events" which means it will rarely be used by middleware apps. Neutrino can even be used in deployments where no RFID reader is needed.

Fusion

The Fusion project is a generalized middleware system that takes RFID (and other sensor) input and adds business contexts necessary to add meaning to that raw sensor input. It implements the ALE, EPC-IS and Reader Protocol standards.

Graviton

The Graviton project implements the hardware sensor layer of an RFID deployment. It containts a reader simulator, an implementation of the Reader Protocol and Reader Management standards.