Monday, October 26, 2009

Semantic Sensor Networks - raw notes 4

Semantic management of streaming data - Rodriguez et al

Extension to RDF with a triple store and query engine to bridge triple stores and streaming stores. RDF does not have a built-in concept of time or dynamic data. Virtual sensors project views out of streamed radar data.

Resources, not triples, are timestamped. Add an annotation to the resource URI containing the timestamp. Finding the latest value of a stream requires optional and filter-not-bound in regular SPARQL. In TA-RDF, this reduces to annotation "[LAST]". Implementation based on Tupelo over Sesame.

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