CFP: Tenth International Workshop on Constraint Handling Rules

Tenth International Workshop on Constraint Handling Rules
CHR 2013

Berlin (Germany), July 13th, 2013

(co-located with the 3rd Intl Summer School on CHR)


The CHR 2013 Workshop will be held on July 13th, 2013 in Berlin (Germany) at the occasion of the 3rd International Summer School on CHR. More information on the venue and the co-located summer school can be found on the summer school website (

The Constraint Handling Rules (CHR) language has become a major declarative specification formalism and implementation language for constraint reasoning algorithms and applications. Algorithms specified using inference rules, rewrite rules, sequents, proof rules, or logical axioms can often be directly written in CHR. Its clean semantics facilitates program design, analysis, and transformation. For more information, please visit the CHR website (

The aim of the CHR workshop series is to stimulate and promote international research and collaboration on topics related to the CHR language. The workshop is a lively, friendly forum for presenting and discussing new results, interesting applications, and work in progress. Previous Workshops on Constraint Handling Rules were organized in 2004 in Ulm (Germany), in 2005 in Sitges (Spain) at ICLP, in 2006 in Venice (Italy) at ICALP, in 2007 in Porto (Portugal) at ICLP, in 2008 in Hagenberg (Austria) at RTA, in 2009 in Pasadena (California, US) at ICLP, in 2010 in Edinburgh (Scotland, UK) at ICLP, in 2011 in Cairo (Egypt), at the 2nd CHR summer school, and in 2012 in Budapest (Hungary) at ICLP.

Topics of Interest

The workshop calls for full papers and short papers describing ongoing work on any aspect of CHR and related approaches. The following topics are relevant (this list is non-exhaustive):

  • (Logical) Algorithms
  • Applications
  • Constraint Solvers
  • Critical Assessment
  • Expressiveness and Complexity
  • Implementations and Optimization
  • Language Extensions (Types, Modules,…)
  • Mutual inspiration from related areas such as Answer Set Programming, (Term) Rewriting Systems, …
  • Program Analysis
  • Program Transformation and Generation
  • Programming Environments (Debugging)
  • Programming Pearls
  • Programming Tools
  • Retractable Constraints
  • Semantics
  • System Descriptions

Important dates

  • Paper submission deadline: May 14th, 2013 [EXTENDED!]
  • Notification of acceptance: June 8th, 2013
  • Final version due: June 23rd, 2013
  • Workshop date: July 13th, 2013

Submission Information

The two categories for submissions are:

  • full papers for describing technically sound, innovative ideas that can advance the state of the art of CHR;
  • short papers, for ongoing work not yet ready for full publication and research project overviews.

All papers must describe original, previously unpublished research, and must not simultaneously be submitted for publication elsewhere. They must be written in English. Technical papers must not exceed 15 pages. The limit for short papers is 8 pages, as is the standard page limit for application papers, and system and tool papers. However, particularly strong contributions in the latter two areas may be submitted as technical paper as well.

All papers must be in the Springer LNCS format. General information about the Springer LNCS series and the LNCS authors’ instructions are available at the Springer LNCS home page

Submissions must be made via the EasyChair submission system, available at

Programme Committee

  • Slim Abdennadher, German University of Cairo, Egypt
  • María Alpuente, UPV, Spain
  • Henning Christiansen, Roskilde University, Denmark (co-chair)
  • Marina De Vos, University of Bath, UK
  • François Fages, INRIA Rocquencourt, France
  • Thom Frühwirth, University of Ulm, Germany
  • Maurizio Gabbrielli, University of Bologna, Italy
  • Marco Gavanelli, University of Ferrara, Italy
  • Rémy Haemmerlé, Technical University of Madrid, Spain
  • Michael Maher, University of New South Wales, Canberra, Australia
  • Thierry Martinez, INRIA Paris-Rocquencourt, France
  • Maria Chiara Meo, Gabriele d’Annunzio University, Italy
  • Eric Monfroy, UTFSM and LINA, Chile/France
  • Tom Schrijvers, Ghent University, Belgium
  • Jon Sneyers, KU Leuven, Belgium (co-chair)
  • Armin Wolf, Fraunhofer FIRST, Germany

Workshop Coordinators

Contact: [email protected]

Henning Christiansen
Department of Communication, Business and Information Technologies,
Roskilde University, Denmark

Jon Sneyers
Department of Computer Science, KU Leuven
Leuven, Belgium
Steering committee:

Thom Frühwirth
Programmiermethodik und Compilerbau, Ulm University
Ulm, Germany

Slim Abdennadher
Department of Computer Science & Engineering, German University in Cairo
Cairo, Egypt