14. A system to calculate time weight in an RDF graph, comprising: an inference engine module; a first communication interface to the inference engine module, the first communication interface configured to provide one or more triples of the RDF graph to the inference engine module, the one or more triples comprising a time information; a first communication interface to the inference engine module, the first communication interface configured to provide an epoch time to the inference engine, wherein the inference engine module is configured: to calculate an elapsed time from the epoch time to the time value; and to inversely weight the time information by the elapsed time, to provide a calculated time weight.
20. The system of claim 14 , wherein the time information of the one or more triples of the RDF graph comprises a RDF reification statement of the RDF graph.