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This paper describes an advanced peer-to-peer (P2P) platform called the Semantic Information Oriented Network (SIONet). This is a meta-network that delivers user events based on semantic information (meta-data) and searches for specific entities dynamically in the network. SIONet consists of Semantic Information (SI) Switch (SI-SW), which compares the meta-data of each event with the receiver's conditions, SI-Router (SI-R), which routes events between two SI-SWs, Event Place (EP), which is a logical subnet constructed by SI-SW and SI-R, and SI-Gateway (SI-GW), which connects EPs. These elements are self-organizing as needed, making possible a secure and scalable P2P network.