Situation modelling, representation, and querying in context-as-a-service IoT platform

Alexey Medvedev, Alireza Hassani, Pari Delir Haghighi, Sea Ling, Maria Indrawan-Santiago, Arkady Zaslavsky, Prem Prakash Jayaraman, Ulrich Fastenrath, Florian Mayer, Niklas Kolbe

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

5 Citations (Scopus)


As the Internet of Things (IoT) is entering the System-of-Systems phase, the demand for effortless access to contextual information will be a fundamental factor for IoT expansion, sustainability, interoperability and acceptance. A number of context management platforms are competing in the area, while the standardization efforts on the interfaces are still in the early stage. In this paper, we extend our previous work on the Context-as-a-Service platform and its interface-Context Definition and Query Language (CDQL). We propose a generic approach to represent and query situations in IoT environment. Moreover, we show how the temporal relations between situations can be used in situation descriptions and queries to define highlevel situations.

Original languageEnglish
Title of host publication2018 Global Internet of Things Summit (GLOTS)
Subtitle of host publicationJune 4-7, 2018 Bilbao, Spain
EditorsAntonio Fernando Skarmeta Gomez
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages6
ISBN (Electronic)9781538664513, 9781538664506
ISBN (Print)9781538664520
Publication statusPublished - 2018
EventGlobal Internet of Things Summit 2018 - Bilbao, Spain
Duration: 4 Jun 20187 Jun 2018


ConferenceGlobal Internet of Things Summit 2018
Abbreviated titleGIoTS 2018
Internet address


  • context
  • event
  • IoT
  • processing
  • situation
  • temporal relation

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