AMQP Advanced Message Queuing Protocol is an open standard designed to support reliable, high-performance messaging over the Internet. AMQP can be used for any distributed or business application, and supports common messaging paradigms like point-to-point, fanout, publish-subscribe, and request-response. Apache Qpid implements AMQP, including transaction management, queuing, clustering, federation, security, management and multi-platform support. Apache Qpid implements the latest AMQP specification, providing transaction management, queuing, distribution, security, management, clustering, federation and heterogeneous multi-platform support and a lot more. Apache Qpid is highly optimized, and aims to be 100% AMQP Compliant.

AMQP 0-10 Specification (PDF) AMQP 0-10 Protocol Definition XML AMQP 0-10 Protocol Definition DTD AMQP 0-9-1 Specification (PDF) AMQP 0-9-1 Protocol Documentation (PDF) AMQP 0-9-1 Protocol Definitions (XML) AMQP 0-9 Specification (PDF) AMQP 0-9 Protocol Documentation (PDF) AMQP 0-9 Protocol Definitions (XML) AMQP 0-8 Specification (PDF) AMQP 0-8 Protocol Documentation (PDF) AMQP 0-8 Protocol Definitions (XML)