Integration Server is the central run-time component of a publish-subscribe solution. It serves as the entry point for the systems and applications that you want to integrate, and is the system’s primary engine for the execution of integration logic. It also provides the underlying handlers and facilities that manage the orderly processing of information from resources inside and outside the enterprise. Integration Server publishes documents to and receives documents from Universal Messaging or Broker. For more information about Integration Server, see webMethods Integration Server Administrator’s Guide.