ISO/IEC 19464:2014 defines the Advanced Message Queuing Protocol (AMQP), an open internet protocol for business messaging. It defines a binary wire-level protocol that allows for the reliable exchange of business messages between two parties. AMQP has a layered architecture and the specification is organized as a set of parts that reflects that architecture.
Part 1 defines the AMQP type system and encoding.
Part 2 defines the AMQP transport layer, an efficient, binary, peer-to-peer protocol for transporting messages between two processes over a network.
Part 3 defines the AMQP message format, with a concrete encoding.
Part 4 defines how interactions can be grouped within atomic transactions.
Part 5 defines the AMQP security layers.