SmartOntoSensor: Ontology for Semantic Interpretation of Smartphone Sensors Data for Context-Aware Applications

Algorithm 2

SPARQL query for detecting a context and service using low level sensory data.

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>

PREFIX owl: <http://www.w3.org/2002/07/owl#>

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>

PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

PREFIX ssn: <http://purl.oclc.org/NET/ssnx/ssn#>

PREFIX cxt: <http://a.com/ontology#>

PREFIX sos: <http://www.semanticweb.org/shoonikhan/ontologies/2015/9/SmartOntoSensor#>

SELECT ?context ?service

  WHERE       

         ?acc sos:hasAccelerometerValue ?offset.

         ?offset sos:accXAxis ?xaxis.

         ?offset sos:accYAxis ?yaxis.

         ?offset sos:accZAxis ?zaxis.

         FILTER (((?xaxis >= "-10.9"^∧∧xsd:float) && (?xaxis <= "0.4"^∧∧xsd:float)) &&

          ((?yaxis >= "-0.5"^∧∧xsd:float) && (?yaxis <= "0.6"^∧∧xsd:float)) &&

          ((?zaxis >= "-15.0"^∧∧xsd:float) && (?zaxis <= "18.0"^∧∧xsd:float))).

         ?offset ssn:hasValue ?obsvalue.

         ?obsvalue sos:hasObservationLocation ?obsloc.

         ?obsvalue sos:identifyContext ?context.

         ?context sos:hasActivityLocation ?cxtloc.

         ?cxtloc sos:hasCoordinates ?activityloc.

         FILTER (?obsloc = ?activityloc).

         ?context sos:startService ?service.