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Querying Dynamic Datasources with Continuously Mapped Sensor Data

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Querying Dynamic Datasources with Continuously Mapped Sensor Data

  1. 1. #TP Triple Pattern Fragments Query Streamer Publish & Query Sensor Data Ruben.Taelman@UGent.be @rubensworks RML Continuous ETL process for sensor data publication Extract Transform Load Raw sensor measurement RDF sensor measurement Time-annotated RDF sensor measurement Continuous client-side querying of sensor data PREFIX dat: <http://vocab.datex.org/terms#> PREFIX saref: <https://w3id.org/saref#> PREFIX dbp: <http://dbpedia.org/ontology/> SELECT ?temperature ?humidity WHERE { ?sensor a saref:Sensor; dat:humidity ?humidity; dbp:temperature ?temperature. } Expose sensor data through a low-cost interface Sensor data can be consumed by clients What is the current temperature and humidity?

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