OCaml 2017

The OCaml Users and Developers Workshop: Oxford, UK, September 8th, 2017.

The OCaml Users and Developers Workshop brings together the OCaml community, including users of OCaml in industry, academia, hobbyists and the free software community. Previous editions have been colocated with ICFP 2012 in Copenhagen, ICFP 2013 in Boston, ICFP 2014 in Gothenburg, ICFP 2015 in Vancouver and ICFP 2016 in Nara, following the OCaml Meetings that ran until 2011.

OCaml 2017 will be held on Friday September 8th, 2017 in Oxford, UK, colocated with ICFP 2017 and FSCD 2017. It happens the day after the ML workshop.


OCaml 2017 will open with an invited talk by three frequent contributors that recently became maintainers of the OCaml implementation: David Allsopp, Florian Angeletti, and Sébastien Hinderer.

Due to the high number of high-quality submissions, we had to have more posters than in previous editions to fit a one-day schedule. Presentations were selected as talks or posters based on what presentation medium could work well, rather than on any preference on the content.

The following works will be presented as talks

  • A B-tree library for OCaml
    Tom Ridge

  • A memory model for multicore OCaml
    Stephen Dolan, KC Sivaramakrishnan

  • Component-based Program Synthesis in OCaml
    Zhanpeng Liang, Kanae Tsushima

  • Extending OCaml's open
    Runhang Li, Jeremy Yallop

  • Genspio: Generating Shell Phrases In OCaml
    Sebastien Mondet

  • Owl: A General-Purpose Numerical Library in OCaml
    Liang Wang

  • ROTOR: First Steps Towards a Refactoring Tool for OCaml
    Reuben N. S. Rowe, Simon Thompson

  • Testing with Crowbar
    Stephen Dolan, Mindy Preston

  • Tezos: the OCaml Crypto-Ledger
    Benjamin Canou, Grégoire Henry, Pierre Chambart, Fabrice Le Fessant, Arthur Breitman

  • The State of the OCaml Platform: September 2017
    Anil Madhavapeddy

  • Wodan: a pure OCaml, flash-aware filesystem library
    Gabriel de Perthuis

The following works will be presented as posters.

  • ocamli: Interpreted OCaml
    John Whitington

  • mSAT: An OCaml SAT Solver
    Bury Guillaume

  • Tyre – Typed Regular Expressions
    Gabriel Radanne

  • Jbuilder: a modern approach to OCaml development
    Jeremie Dimino, Mark Shinwell

Call for presentations (past)


Presentations and discussions will focus on the OCaml programming language and its community. We aim to solicit talks on all aspects related to improving the use or development of the language and its programming environment, including, for example (but not limited to):

  • compiler developments, new backends, runtime and architectures

  • practical type system improvements, such as (but not limited to) GADTs, first-class modules, generic programming, or dependent types

  • new library or application releases, and their design rationales

  • tools and infrastructure services, and their enhancements

  • prominent industrial or experimental uses of OCaml, or deployments in unusual situations.


It will be an informal meeting with no formal proceedings. The presentation material will be available online from the workshop homepage. The presentations may be recorded, and made available at a later time.

The main presentation format is a workshop talk, traditionally around 20 minutes in length, plus question time, but we also have a poster session during the workshop -- this allows to present more diverse work, and gives time for discussion. The program committee will decide which presentations should be delivered as posters or talks.


To submit a presentation, please register a description of the talk (about 2 pages long) at https://icfp-ocaml17.hotcrp.com/ providing a clear statement of what will be provided by the presentation: the problems that are addressed, the solutions or methods that are proposed.

LaTeX-produced PDFs are a common and welcome submission format. For accessibility purposes, we ask PDF submitters to also provide the sources of their submission in a textual format, such as .tex sources. Reviewers may read either the submitted PDF or the text version.

Important dates

  • Wednesday 31st May (any time zone): Abstract submission deadline
  • Wednesday 28th June: Author notification
  • Friday 8th September 2017: OCaml Workshop

ML family workshop and post-proceedings

The ML family workshop, held on the previous day, deals with general issues of the ML-style programming and type systems, focuses on more research-oriented work that is less specific to a language in particular (OCaml). There is an overlap between the two workshops, and we have occasionally transferred presentations from one to the other in the past. The authors who feel their submission fits both workshops are encouraged to mention it at submission time and/or contact the Program Chairs.

We are planning to publish combined post-proceedings and to invite interested authors of selected presentations to expand their abstracts for inclusion.

Program Committee

  • Ashish Agarwal, Solvuu, USA
  • François Bobot, CEA, France
  • Frédéric Bour, OCaml Labs, France
  • Cristiano Calcagno, Facebook, UK
  • Louis Gesbert, OcamlPro, France
  • Sébastien Hinderer, INRIA, France
  • Atsushi Igarashi, Kyoto University, Japan
  • Oleg Kiselyov, Tohoku University, Japan
  • Julia Lawall, INRIA/LIP6, France
  • Sam Lindley, The University of Edinburgh, UK
  • Louis Mandel, IBM Research, USA
  • Zoe Paraskevopoulou, Princeton University, USA
  • Gabriel Scherer, Northeastern University, USA

Questions and contact

Please send any questions to the chair: Gabriel Scherer <gabriel.scherer@gmail.com>