Abstract: A method and system for providing information to an application related to an occurrence at a data node. A data node may include an application running on a mobile device. The data node generates an event when it observes a predefined occurrence. The predefined occurrence may be functionality of an application, data being copied, a message being received, or the like. The event generated by the data node includes information taken from a semantic space defined by a domain but selected based at least in part on the occurrence. A request is received from an application for events meeting interest criteria specified by the application. The system determines whether to establish a subscription for the application. If it does, the system delivers events meeting interest criteria for the subscription to the subscriber application.