{"$schema":"nexcard/v0.1","id":"898dd8ef-c8e2-4436-b1df-6094d325d0ef","version":1,"state":"completed","createdAt":"2026-10-26T18:58:15.983Z","completedAt":"2026-10-26T18:59:20.631Z","name":"Air quality Freiburg, hourly (demo)","description":"Hourly NO2, PM10, PM2.5 and temperature at three stations, 14 days. Synthetic values with a few gaps and outliers.","tags":["environment","air quality","demo"],"links":{"card":"https://nexcard.data.nexyo.io/card/898dd8ef-c8e2-4436-b1df-6094d325d0ef","json":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef","edp":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/edp","report":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/report"},"source":{"filename":"air-quality-freiburg-demo.csv","mediaType":"text/csv","bytes":54931,"fileType":"csv","structure":["structured"],"demoDataset":"DEMO: synthetic dataset generated by nexCARD"},"governance":{"sha256":{"value":"37e3aaa43fe89ce6518597d815fdeb736fa75de744cf4a3db3c6a3fc5a10591a","basis":"nexCARD","matchesNexEDP":true},"retrievedAt":{"value":"2026-10-26T18:58:15.919Z","basis":"nexCARD"},"license":{"value":"CC-BY-4.0","basis":"uploader"},"publisher":{"value":"DEMO: City of Freiburg (synthetic)","basis":"uploader"},"provenance":{"value":"DEMO: generated by nexCARD, modelled on the DRF data cards Freiburg","basis":"uploader"},"policy":{"value":"DEMO: no policy. nexus would deliver the Authorization Profile of the Resource.","basis":"DEMO"},"dataProduct":{"value":"DEMO: not linked. nexDS would deliver the Data product and Resource.","basis":"DEMO"},"workspace":{"value":"DEMO: nexyo","basis":"DEMO"},"visibility":{"value":"DEMO: public. Review and release by card:manager follows with the Hub connection.","basis":"DEMO"}},"profile":{"basis":"nexEDP","edpSchemaVersion":"1.2.2.dev1+gbf7a976f1","generatedBy":"EDP Service @ 1.2.12.dev0+gab54baf98.d20260407","volumeBytes":54931,"temporalCover":{"earliest":"2026-09-01T00:00:00","latest":"2026-09-14T23:00:00"},"rows":1008,"columns":6,"columnTypes":{"numeric":4,"datetime":1,"text":1},"correlations":{"no":5,"partial":0,"strong":1},"correlationChart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/correlations.png","jsonSchema":null,"columnDetails":[{"name":"no2_ugm3","type":"numeric","dataType":"Float32","missing":10,"unique":317,"inconsistent":0,"min":14,"max":55.70000076293945,"mean":28.975149154663086,"median":27.950000762939453,"stddev":9.061829566955566,"outliersIqr":18,"distribution":"rayleigh","trend":"No Trend","chart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/no2_ugm3_box_plot.png","distChart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/no2_ugm3_distribution.png"},{"name":"pm10_ugm3","type":"numeric","dataType":"Float32","missing":0,"unique":96,"inconsistent":0,"min":11,"max":79.9000015258789,"mean":15.717658996582031,"median":15.449999809265137,"stddev":5.001313209533691,"outliersIqr":5,"distribution":"uniform","trend":"No Trend","chart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/pm10_ugm3_box_plot.png","distChart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/pm10_ugm3_distribution.png"},{"name":"pm25_ugm3","type":"numeric","dataType":"Float32","missing":0,"unique":79,"inconsistent":0,"min":6.900000095367432,"max":50.900001525878906,"mean":10.74613094329834,"median":10.5,"stddev":3.1382548809051514,"outliersIqr":5,"distribution":"exponpow","trend":"No Trend","chart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/pm25_ugm3_box_plot.png","distChart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/pm25_ugm3_distribution.png"},{"name":"temperature_c","type":"numeric","dataType":"Float32","missing":0,"unique":136,"inconsistent":0,"min":10,"max":23.5,"mean":16.760318756103516,"median":16.799999237060547,"stddev":4.281723976135254,"outliersIqr":0,"distribution":"uniform","trend":"No Trend","chart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/temperature_c_box_plot.png","distChart":"https://nexcard.data.nexyo.io/api/cards/898dd8ef-c8e2-4436-b1df-6094d325d0ef/files/air-quality-freiburg-demo_csv/temperature_c_distribution.png"},{"name":"timestamp","type":"datetime","missing":0,"unique":336,"inconsistent":0,"format":"ISO8601","earliest":"2026-09-01T00:00:00","latest":"2026-09-14T23:00:00"},{"name":"station","type":"text","missing":0,"unique":3,"inconsistent":0}],"quality":{"completenessPct":99.8,"missingCells":10,"inconsistentCells":0,"inconsistentPct":0,"outliersIqr":28,"outliersIqrPct":0.7,"note":"Describes the data. It does not rate it."},"withheld":null},"error":null}