28. The system of claim 20 , wherein the state information is a tagged byte-sequence representing typed data, wherein the state information includes a type header and a type-specific data layout.
20. The system of claim 1 , comprising detecting an event of a source device, wherein the source device includes the tracking component running on the processor, generating at least one data sequence comprising device event data specifying the event and state information of the event, wherein the device event data and state information are type-specific data having a type corresponding to an application of the source device, and forming a data capsule to include the at least one data sequence, the data capsule having a data structure comprising an application-independent representation of the at least one data sequence.