MAY 28, 2023 - Hersonissos, Crete

First International Workshop on Semantic Web on Constrained Things

Held at the ESWC 2023 conference


In recent years, the combination of Internet of Things (IoT), Semantics and Web of Things (SWoT) has been more and more popular to collect sensing data according to the semantic web stack and build smart services and applications. One momentum is the release of a W3C recommendation for WoT architecture along with a formal specification of Thing Descriptions. The Web of Things (WoT) allows to describe device semantics, bridging the gap between device and service descriptions. Developers can use WoT standards and tools to collect sensing data and control devices for the applications in agriculture, energy, enterprise, finance, healthcare, industry, etc.

At the same time, decentralized infrastructures able to capture and transform data at the edge have gained attraction over centralized ones, due to both the constant attempts to reduce industrial costs and the real necessity to reduce global carbon emissions. Decentralized infrastructures hence represent a step towards the so-called Green Web, especially as they are usually built on small and low-energy consuming devices. However, fulfilling the SWoT promises using such infrastructures poses new challenges as these small devices are constrained in terms of computing capabilities and memory, and since wireless network communications are also energy-consuming and can hinder battery life of autonomous devices. Deploying SWoT standards on such devices require to control and monitor the consumption of these resources, whereas semantic technologies are known to be verbose and computation intensive.

This first international workshop aims at bridging together research and industry communities working on the different aspects of embedding data semantics and standards-based solutions into edge and/or constrained Internet and Web of Things setups, as well as reducing the carbon footprint of semantic technologies.
The workshop will include a keynote presentation, different types of submission (research, in-use, experience, position, tools and demos), and break-out discussions.


16-12-2022: Workshop accepted by ESWC chairs
19-12-2022: First version of the website online
20-02-2023 The workshop date is confirmed
07-03-2023 Paper submission deadline (extension): March 15, 2023 (AoE)
07-03-2023 Dr. Sabastian Käbisch, first keynote speaker: March 28, 2023
14-04-2023 Notifications of acceptance sent to authors!!
10-05-2023 Camera ready and files for proceedings received
16-05-2023 Program available!!
28-05-2023 Workshop held in room Polymnia & Kalia!!
10-06-2023 Proceedings available at CEUR-WS.ORG !! Vol-3412 (urn:nbn:de:0074-3412-0)


The purpose of the workshop is to provide a venue for scientific presentations, systematic analysis and rigorous evaluation of semantic WoT architectures, ontologies and tools, as well as practical and applied experiences and lessons-learned applied to constrained devices both from academia and industry. The workshop can lead to a contribution to the W3C community group on WoT.

Topics of interest include, but are not limited to:

  1. Automatization of knowledge graph construction for embedded systems
  2. Libraries and tools for creating knowledge graphs at the edge
  3. Ontologies and models adjustments for solving data and service heterogeneity in constrained networks
  4. Extensions of current State-of-the Art ontologies (M2M, SSN/SOSA, SAREF, etc) for sensing, converting raw data for embedded systems
  5. Ontology / vocabulary efficient integration and communication in embedded systems
  6. Smart brokers to exchange messages between edge and gateways
  7. Binary RDF formats to efficiently exchange datasets among smart devices
  8. Low coding approaches applied to constrained devices
  9. Architectural considerations for constrained devices
  10. Distributed querying and reasoning in edge computing
  11. Stream processing / reasoning at the edge
  12. Experimentation / evaluation of local resource consumption (memory, processing, etc.) of semantic technologies in constrained devices
  13. Experimentation / evaluation of global efficiency (network, energy consumption, carbon footprint, etc.) of semantic technologies in edge computing
  14. Lessons learned / best practices for implementing SWoT applications for embedded systems
  15. Frugal IoT application use cases in various domains: healthcare, smart agriculture, smart, transportation, robotics, industry 4.0, etc.


The submissions must be written in English using the Springer style (LNCS/CCIS one-column page format) and submitted non-anonymously in PDF via EasyChair. We invite the submission of original research results and proposed research directions related to the focus areas of the workshop, in one of the three categories given below:

  • Full papers (up to 15 pages)
  • Short papers (6-8 pages)
  • Demos (up to 4 pages)
Please note that HTML+RDFa contributions are also welcome as long as the layout complies with the LNCS style.

All proposed papers must be submitted using the easychair conference management system. All submitted papers will be subject to peer-review process. At least one co-author of each accepted paper is required to register to ESWC and present the paper.


Accepted full and short papers will be published in the workshop proceedings. The best papers from each workshop may be included in the supplementary proceedings of ESWC 2023, which will appear in the Springer LNCS series. The accepted papers will be published in CEUR proceedings.


Paper submission deadline (Extension): March 9, 2023 (AoE) March 15, 2023
Paper notification: April 13, 2023 (AoE)
Camera-ready paper with signed copyright: April 30 May 10, 2023
Workshop Day: May 28, 2023 Slides et preprints online: May 29, 2023



Dr. Sebastian Käbisch Siemens AG, Munich - Germany

Accepted Papers

  • Bonte, et al., Towards Cascading Reasoning for Generic Edge Processing
  • Chung, et al., Towards an Indoor Environmental Quality Management Ontology
  • Jan Romann. Bridging the Gap to the Web of Things. On the Conversion between WoT Data Models and the Semantic Definition Format.
  • van der Weerdt, et al., Evaluating the Effect of Semantic Enrichment on Entity Embeddings of IoT Knowledge Graphs
  • Freund, et al., Generating Visual Programming Blocks based on Semantics in W3C Thing Descriptions
  • Fries, et al., A Solid Architecture for Machine Data Exchange with Access Control



Intro. SWoCoT2023 co-chairs

Paper presentation

Generating Visual Programming Blocks based on Semantics in W3C Thing Descriptions. [paper][slides]
Michael Freund, Justus Fries, Thomas Wehr and Andreas Harth

Paper presentation

Towards an Indoor Environmental Quality Management Ontology. [paper][slides]
Jihoon Chung, Gabriel Jacoby-Cooper, Kelsey Rook, Henrique Santos, Dennis Shelden, Elisa F. Kendall and Deborah L. McGuinness.

Paper presentation

Bridging the Gap to the Web of Things. On the Conversion between WoT Data Models and the Semantic Definition Format. [paper][slides]
Jan Romann

Coffee Break

Paper presentation

Towards Cascading Reasoning for Generic Edge Processing. [paper][slides]
Pieter Bonte and Femke Ongenae

Paper presentation

Evaluating the Effect of Semantic Enrichment on Entity Embeddings of IoT Knowledge Graphs. [paper][slides]
Roderick van der Weerdt, Victor de Boer, Laura Daniele, Ronald Siebes and Frank van Harmelen

Paper presentation

A Solid Architecture for Machine Data Exchange with Access Control (short paper) [paper][slides]
Justus Fries, Michael Freund and Andreas Harth


The Web of Things 2.0. Dr. Sebastian Käbisch

Closing Words




Dr. Ghislain Atemezing Mondeca, Paris, France


Dr Lionel Medini Liris Lab / Université Lyon 1, France


Pr. Frédérique Laforest INSA Lyon, France


  • Jean-Paul Calbimonte (HES-SO Valais-Wallis, Switzerland)
  • Victor Charpenay (Mines Saint-Etienne, France)
  • Maxime Lefrançois (Mines Saint-Etienne, France)
  • Catherine Roussey (MISTEA Montpellier, France)
  • Nicolas Seydoux (INRUPT, France)
  • Kamal Singh (University of St-Etienne, France)
  • Antoine Zimmermann (Mines Saint-Etienne, France)
  • Michael Mrissa (University of Primorska - InnoRenew CoE, Slovenia)
  • Pieter Bonte (Ghent University)
  • Raúl García-Castro (Universidad Politécnica Madrid)
  • Alba Fernandez-Izquierdo (BASF Digital Solutions)
  • Andreas Harth (University of Erlangen-Nuremberg, Fraunhofer IIS-SCS)
  • Laura Daniele (TNO, Netherlands)