Packet routing via payload inspection at routers in a core of a distributed network. Packets include subjects and attributes in addition to routing information. The subjects correspond with particular types of content for subscriptions, and the attributes encapsulate the data or content. The routers...http://www.google.de/patents/US20040076155?utm_source=gb-gplus-sharePatent US20040076155 - Caching with selective multicasting in a publish-subscribe network
