20th International Symposium on
Principles and Practice of Declarative Programming

PPDP 2018

Frankfurt am Main, Germany, 3-5 September 2018


  • Most Influental Paper 10-Year Award: The PPDP 2018 program is proud to attribute the Test of Time Award to for their paper: originally published in PPDP 2008.
  • Update to the program:
    PPDP-talk on Pattern Matching and Fixed Points: Resources Types and Strong Call-By-Need by Pablo Barenbaum, Eduardo Bonelli and Kareem Mohamed moved from Monday 3.Sep., 17:00h to Wednesday 5.Sep., 17:00h
    The online program already includes this update.
  • The proceedings are now in ACM's Digital Library (full text article files (PDFs) will be available for download either on the conference start date or on the date set by the ACM SIG.)
  • The program is available here.
  • Conference fees have been published, and the registration is now open.
    See the main page for PPDP | LOPSTR | WFLP 2018 for more information and the link to the registration.
    Note that the early registration deadline is 15th August 2018!
  • The list of accepted papers is now available!

Overview of PPDP 2018

The 20th International Symposium on Principles and Practice of Declarative Programming will take place 3-5 September 2018 in Frankfurt am Main, Germany.

The PPDP 2018 symposium brings together researchers from the declarative programming communities, including those working in the functional, logic, answer-set, and constraint handling programming paradigms. The goal is to stimulate research in the use of logical formalisms and methods for analyzing, performing, specifying, and reasoning about computations, including mechanisms for concurrency, security, static analysis, and verification.

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; probabilistic languages; reactive languages; database languages; knowledge representation languages; languages with objects; language extensions for tabulation; metaprogramming.
  • 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 2018 will be held in Frankfurt am Main, Germany. Previous symposia were held at 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).
They can be browsed at the DBLP Computer Science Bibliography.

Continuing a friendly tradition, PPDP 2018 will be co-located with the 28th International Symposium on Logic-Based Program Synthesis and Transformation (LOPSTR 2018).

PPDP 2018 is in cooperation with ACM SIGPLAN

ACM        SIGPLAN           

The program is available here.

Invited Speakers

Accepted Papers

Program Committee

Important Dates

Call for Papers

The Call for Papers can be viewed or downloaded as

Submission Categories & Guidelines

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 in a clearly marked appendix beyond the above-mentioned page limits. Reviewers are not required to study any material beyond the respective page limit.

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 1.48. You must use the LaTeX sigconf proceedings template as the conference organizers are unable to process final submissions in other formats. In case of problems with the templates, contact ACM's TeX support team at Aptara. 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.



Proceedings are published in the ACM International Conference Proceedings Series, and they are available in the ACM Digital Library (full text article files (PDFs) will be available for download either on the conference start date or on the date set by the ACM SIG.)


Program Chair

Peter Thiemann
Department of Computer Science
University of Freiburg

Local Organiser

David Sabel
Computer Science Institute
Goethe-University Frankfurt am Main