previous arrow
next arrow
8-15 September 2021, Leuven, Belgium

15th International Rule Challenge @ RuleML+RR 2021

The Rule Challenge is one of the highlights of the RuleML+RR conference and creates friendly competition among innovative rule-oriented tools, prototypes and applications, aimed at research, industry and government.

A prize of 500 euro will be awarded for the best Rule Challenge paper/demo. The assessment criteria include originality, creativity together with feasibility.

Submissions may supply benchmarks and comparison results for rule engines, rule-based machine learning techniques, illustrate rule- and model-driven engineering, report on case studies and industrial experiences, and realize mobile deployment of rule-based reasoning.

Rule Challenge 2021 Chair


Program Committee

  • Nikolay Nikolov (SINTEF)
  • Martin Giese (University of Oslo)
  • Barış Sertkaya (Frankfurt University of Applied Sciences)
  • Roman Bauer (University of Surrey)
  • Paul Krause (University of Surrey)
  • Ryan Urbanowicz (University of Pennsylvania)
  • Juliana Küster Filipe Bowles (University of St Andrews)
  • Gong Cheng (Nanjing University)
  • Faruk Hasić (KU Leuven)
  • Antonis Bikakis (University College London)

The challenge seeks high quality, original papers, potentially referencing online material, and ranging between 5-25 pages (in LNCS style). Submitted papers must be original contributions written in English.

Key themes of the Rule Challenge include, but are not limited to the following:

  • Rule-based machine learning tools and techniques
  • Rule-based approaches for intelligent systems
  • Rule-based Event Processing and Stream Reasoning
  • Business Rules Modelling
  • Rule standardization forresearch, industry and government
  • Graph-Relational Data and Knowledge systems
  • Higher-Order-Logic and Modal-Logic systems
  • Rule and Ontology combinations
  • Modular Rule systems
  • Distributed Rule systems / multi-agent systems
  • Ontology-Based Data Access (OBDA) systems
  • Answer Set Programming (ASP) systems
  • Constraint Logic Programming (CLP) systems
  • Blockchain Rule systems
  • Defeasible, Argumentation, and Legal systems
  • (Controlled) Natural language interfaces
  • Distributed rule bases and rule services
  • Rules and model-driven engineering
  • Reports on industrial experience about rule systems
  • Combining rules with knowledge extraction and information retrieval
  • Rules and social media


Submissions: via EasyChair

Remember to choose the "Challenge" track.

Please upload all submissions in LNCS format.

To ensure high quality, submissions will be carefully peer-reviewed by at least 3 PC members as well as external reviewers.

Submissions should address the following, where possible:

  • Explain the objectives, outcomes, benefits as you are going beyond the state of the art in technology, the application domain, etc.
  • Demonstrate the results with a concrete example balancing conciseness and completeness.
  • Preferably (but not necessarily) embed the tool in a web-based or distributed environment or a mobile environment.
  • Present end-user interactions, providing an adequate and usable interface that favors a concrete usage of the application.
  • Mention the availability of the software and data, data interchange, and possible tool extensions.
  • Provide a web-link to the project site, online demonstration, or download site.

Important dates

  • Paper submission: July 30, 2021
  • Author notification: August 14, 2021
  • Camera-ready submission Challenge & Industry: September 6, 2021
  • Rule Challenge: September 13 – 15, 2021


For each of these deadlines, a cut-off point of 23:59 AOE applies.