25th International Symposium on
Principles and Practice of Declarative Programming

PPDP 2023

October 22-23, 2023 - Cascais, Lisbon, Portugal

Collocated with SPLASH


  • Selected papers will be invited to the Journal of Functional Programming (JFP) or the Journal of Theory and Practice of Logic Programming (TPLP)
  • Proceedings will be published in the ACM Digital Library within the ACM International Conference Proceedings Series.
  • Submission page is available here.
  • Conference is In-Cooperation with ACM, SIGPLAN, and SIGLOG.
  • Program Committee announced.

Overview of PPDP 2023

PPDP aims to provide a forum that brings together researchers from the declarative programming communities, including those working in the logic, constraint and functional programming paradigms, but also embracing a variety of other paradigms such as visual programming, executable specification languages, database languages, AI languages and knowledge representation languages used, for example, in the semantic web.

The goal is to stimulate research in the use of logical formalisms and methods for specifying, performing, and analysing computations, including mechanisms for mobility, modularity, concurrency, object-orientation, security, and static analysis. Papers related to the use of declarative paradigms and tools in industry and education are especially solicited.


Submissions are invited on all topics related to declarative programming, from principles to practice, from foundations to applications. Topics of interest include, but are not limited to

  • Language Design: domain-specific languages; interoperability; concurrency, parallelism and distribution; modules; functional languages; reactive languages; languages with objects; languages for quantum computing; languages inspired by biological and chemical computation; metaprogramming.

  • Declarative languages in artificial intelligence: logic programming; database languages; knowledge representation languages; probabilistic languages; differentiable languages.

  • Implementations: abstract machines; interpreters; compilation; compile-time and run-time optimization; memory management.

  • Foundations: types; logical frameworks; monads and effects; semantics.

  • Analysis and Transformation: partial evaluation; abstract interpretation; control flow; data flow; information flow; termination analysis; resource analysis; type inference and type checking; verification; validation; debugging; testing.

  • Tools and Applications: programming and proof environments; verification tools; case studies in proof assistants or interactive theorem provers; certification; novel applications of declarative programming inside and outside of CS; declarative programming pearls; practical experience reports and industrial application; education.

The PC chair will be happy to advise on the appropriateness of a topic.

PPDP 2023 will be held in Cascais, Lisbon, Portugal. Previous symposia were held at Tbilisi (Georgia), Tallinn (Estonia), Bologna (Italy), Porto (Portugal), Frankfurt am Main (Germany), Namur (Belgium), Edinburgh (UK), Siena (Italy), Canterbury (UK), Madrid (Spain), Leuven (Belgium), Odense (Denmark), Hagenberg (Austria), Coimbra (Portugal), Valencia (Spain), Wroclaw (Poland), Venice (Italy), Lisboa (Portugal), Verona (Italy), Uppsala (Sweden), Pittsburgh (USA), Florence (Italy), Montréal (Canada), and Paris (France).



Invited Speakers




Program Committee

Salvador Abreu, NOVA LINCS / University of Evora, Portugal
Beniamino Accattoli, Inria & LIX, École Polytechnique, France
Maria Paola Bonacina, Università degli Studi di Verona, Italy
Santiago Escobar, Universitat Politècnica de València, Spain (chair)
Mário Florido, Universidade do Porto, Portugal
Silvia Ghilezan, University of Novi Sad and SANU, Serbia
Michael Hanus, University of Kiel, Germany
Ekaterina Komendantskaya, Heriot-Watt University, UK
Ugo de'Liguoro, Università di Torino, Italy
Alberto Lluch Lafuente, Technical University of Denmark, Denmark
Georg Moser, University of Innsbruck, Austria
Daniele Nantes-Sobrinho, University of Brasília, Brazil
Vivek Nigam, Huawei Technologies Düsseldorf GmbH, Germany
Kazuhiro Ogata, Japan Advanced Institute of Science and Technology (JAIST), Japan
Carlos Olarte, LIPN, Université Sorbonne Paris Nord, France
Giselle Reis, Carnegie Mellon University, Qatar
Adrián Riesco, Universidad Complutense de Madrid, Spain
Julia Sapiña, Universitat Politècnica de València, Spain

Important Dates

15.05.2023 - AoE title and abstract submission
22.05.2023 - AoE paper submission
28.06.2023 - Rebuttal period (48 hours)
09.07.2023 - Notification
30.07.2023 - Final paper
22.10.2023 - Conference starts

Call for Papers

The Call for Papers can be found here

Submission Categories & Guidelines

Submission page is available via EasyChair.

Selected papers will be invited to the Journal of Functional Programming (JFP) or the Journal of Theory and Practice of Logic Programming (TPLP).

Submission Categories

Submissions can be made in three categories: regular Research Papers, System Descriptions, and Experience Reports.

Submissions of Research Papers must present original research which is unpublished and not submitted elsewhere. They must not exceed 12 pages ACM style 2-column (including figures, but excluding bibliography). Work that already appeared in unpublished or informally published workshop proceedings may be submitted (please contact the PC chair in case of questions). Research papers will be judged on originality, significance, correctness, clarity, and readability.

Submission of System Descriptions must describe a working system whose description has not been published or submitted elsewhere. They must not exceed 10 pages and should contain a link to a working system. System Descriptions must be marked as such at the time of submission and will be judged on originality, significance, usefulness, clarity, and readability.

Submissions of Experience Reports are meant to help create a body of published, refereed, citable evidence where declarative programming such as functional, logic, answer-set, constraint programming, etc., is used in practice. They must not exceed 5 pages including references. Experience Reports must be marked as such at the time of submission and need not report original research results. They will be judged on significance, usefulness, clarity, and readability.

Possible topics for an Experience Report include, but are not limited to:

  • insights gained from real-world projects using declarative programming
  • comparison of declarative programming with conventional programming in the context of an industrial project or a university curriculum
  • curricular issues encountered when using declarative programming in education
  • real-world constraints that created special challenges for an implementation of a declarative language or for declarative programming in general
  • novel use of declarative programming in the classroom
  • programming pearl that illustrates a nifty new data structure or programming technique.

Supplementary material may be provided via a link to an extended version of the submission (recommended), or in a clearly marked appendix beyond the above-mentioned page limits. Reviewers are not required to study extended versions or any material beyond the respective page limit. Material beyond the page limit will not be included in the final published version.

Format of a submission

For each paper category, you must use the most recent version of the "Current ACM Master Template" which is available at https://www.acm.org/publications/proceedings-template. The most recent version at the time of writing is 1.75. You must use the LaTeX sigconf proceedings template as the conference organizers are unable to process final submissions in other formats. Authors should note ACM's statement on author's rights which apply to final papers. Submitted papers should meet the requirements of ACM's plagiarism policy.

Requirements for publication

At least one author of each accepted submission will be expected to attend and present the work at the conference. The pc chair may retract a paper that is not presented. The pc chair may also retract a paper if complaints about the paper's correctness are raised which cannot be resolved by the final paper deadline.

Review process

The reviewing is single-blind.


The PPDP 2023 proceedings will be published in the ACM Digital Library within the ACM International Conference Proceedings Series


Program Committee Chair

Santiago Escobar
Universitat Politècnica de València

Steering Committee Chair

James Cheney
University of Edinburgh

In Cooperation with