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Linked Data Use and the Internet of Things

Linked Data Use and the Internet of Things. Stephan Haller, SAP Research May 2011. The Internet of Things will provide a massive amount of data about the physical world …. … But how to make sense of it all ??.  Enormous possibilities !!. An example ….

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Linked Data Use and the Internet of Things

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  1. Linked Data Use and the Internet of Things Stephan Haller, SAP Research May 2011

  2. The Internet of Things will provide a massive amountofdataaboutthephysicalworld…. … But howtomake sense ofit all ??  Enormouspossibilities!!

  3. An example… • After Fukushima on Pachube http://community.pachube.com/node/611#3d, 31.3.2011

  4. Manypeopleconnectedradiationsensors… http://japan.failedrobot.com/, 31.3.2011

  5. Cool, but … • Data qualityofvarioussources • Accuracyofeachdatapoint • Sensor reliabilityandavailiability • Time ofmeasurement • Importantfortrust! • Unit jungle: • nGy/s, mSv/h, μSv/h, Bq/kg, cpm … • Sometimesmisleading, sometimes just hardtocompare… • Mix ofdatasources • Real sensors • Virtual sensors (datascrapingfrom web pages, e.g., http://www.houshasen-pref-ibaraki.jp/present/result01.html)

  6. How can Linked Data help? Information Visualization & Navigation Service Consumption … Information Integration Novel Applications & Infrastructure Services • Integration ofdatafromvarioussources • Annotation • Comparability • Ready-made consumptionbyotherservicesandapplications Integrated „View“ of Linked Resources Linked Data, Services, Processes linkable LOD Cloud • linked wrt. To terms & processes • RDF representation Graph-based Models Information Integration & Federation Data Annotation (semi-) automated Analysis “RDF 4 Sensors” Web pages Legacy Systems

  7. The PromiseofLinked Data forIoT… • Interoperable IoT knowledge layer on top of emerging IoT architectures • Vocabularies and ontologies to represent IoT resources and data according to linked data standards • Unified query processing and reasoning for highly dynamic spatio-temporal IoT data across a multitude of IoTresources • Run-time query plan optimization algorithms

  8. But isLinked Data reallysuitablefortheIoT? • Who toannotate? • RDF cumbersome • Incentives? • Automation possible? • Whereistheannotationandtheprocessingdone? • Constrainedenvironments • Balance betweenedgeandnetwork • Static vs. streameddata • Data fromsensorsasstreamsof (mostly) irrelevant data

  9. W3C Effortsunderway • SPARQL Query Language for RDF • W3C recommendation • IoT-specific issues to be addressed: • Spatio-temporal properties of IoT data • Continuous query processing involving multiple data sources • Binary RDF Representation for Publication and Exchange (HDT) • W3C Submission • Header-Dictionary Triples • Constrained environments • W3C Semantic Sensor Network Incubator Group • Bring sensor data to a semantic level • Capabilities of sensors • Linked Stream Data

  10. Anda final setofquestions … • Social-network-likeproviders • Individualsareputtingsensorsanddata on the web • Howreliablearethese? • Data quality • Availability • Whatincentiveisnecessary so thattheyprovide RDF annotations? • Commercial providers • Guarantueed SLAs • New businessmodelsandrolesneeded? • Howtocommercialize, e.g., (micro-) billingforservice/datause?

  11. Summary • UsingLinked Data fortheIoTcould form thebasisfor an interoperable knowledgelayeraboutthephysicalworld • Possiblynewbusinessrolesandplayersemerging • But therearechallenges… • Annotation / metadatarequired • Constrainedenvironments • Streameddata

  12. Stephan Haller Development Architect – Internet of ThingsSAP Research CEC Zürich SAP (Schweiz) AG Kreuzplatz 20 CH - 8008 Zürich T +41 58 871 78 45 F +41 58 871 78 12 E stephan.haller@sap.com Danke　ありがとう　Merci आभारी हुँ Grazie Gracias 　謝謝 　ObrigadoΕυχαριστώTack 감사합니다Dankieشكرا Xin cảm ơn благодаряKösziTerima kasihспасибо Mahalo ขอบคุณ Ngiyabonaநன்றிתודה TeşekkürlerMulţumescمرسي Ndiyabulela DziękiGrazcha Thank You!

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