[QueryItem="station_sensor"] PREFIX : SELECT * { ?station a :WeatherStation ; :hasSensor ?sensor . } LIMIT 10 [QueryItem="station_temperature"] PREFIX : SELECT * { ?station a :WeatherStation ; :hasSensor ?sensor . ?sensor a :TemperatureSensor . } LIMIT 10 [QueryItem="temperature_today"] PREFIX xsd: PREFIX : SELECT * { ?station a :WeatherStation ; :hasSensor ?sensor . ?sensor a :TemperatureSensor ; :hasMeasurement ?m . ?m :hasDate "2018-07-03"^^xsd:date } LIMIT 10 [QueryItem="last_update"] PREFIX xsd: PREFIX : SELECT * { ?station a :WeatherStation ; :hasSensor ?sensor . ?sensor :lastUpdate ?ts . } LIMIT 10 [QueryItem="station_and_observation"] PREFIX geo: PREFIX sosa: PREFIX : SELECT * { ?station a :WeatherStation ; :hasSensor ?sensor ; :longitude ?lon; :latitude ?lat . ?sensor sosa:madeObservation ?o . ?o sosa:hasSimpleResult ?v . ?o sosa:resultTime ?t . } LIMIT 100