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Download SWI-Prolog development versions

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Binaries
Windows version (64-bits)11,686,404 bytesSWI-Prolog 7.7.22-1 for Microsoft Windows (64 bit)

Self-installing executable for Microsoft's 7/8/10 64-bit editions. See the reference manual for deciding on whether to use the 32- or 64-bits version.

SHA256:c744c6d3ea89a7ba03787a0f38bdb441fc958463878ce334bc30bf01011f3d59
Windows version (32-bits)11,395,755 bytesSWI-Prolog 7.7.22-1 for Microsoft Windows (32 bit)

Self-installing executable for MS-Windows. Installs swipl-win.exe and swipl.exe. Works on Windows 7/8/10.

SHA256:e390cb7d4997c2b6658ab8c67d66ef8a731a4a5f1757f30880a07c2a4fa2760c
Snow Leopard and later23,150,975 bytesSWI-Prolog 7.7.22-1 for MacOSX 10.6 (Snow Leopard) and later on intel

Mac OS X disk image with relocatable application bundle. Needs xquartz (X11) installed for running the development tools. The bundle also provides the commandline tools in the Contents/MacOS directory.

SHA256:0e24f9ac72983ec89d3e1f748d48b79ced89dcf85fbff8dd226abda03694e29d
Sources
Source archive10,408,402 bytesSWI-Prolog source for 7.7.22

Sources in .tar.gz format, including packages and generated documentation files. See build instructions.

SHA256:55096d6bc1d70463b3cf1148e43e8953733ab30ca06ba3f467b562762ed4cb4c
Documentation
PDF file2,468,815 bytesSWI-Prolog 7.7.22 reference manual in PDF

SWI-Prolog reference manual as PDF file. This does not include the package documentation.

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Install scripts may download the SHA256 checksum by appending .sha256 to the file name. Scripts can download the latest version by replacing the version of the file with latest. This causes the server to reply with the location of the latest version using an HTTP 303 See Other message.

About the development releases

The development branches have their own GIT repository at the address below. See the general GIT instructions for details.

% git clone https://github.com/SWI-Prolog/swipl-devel.git

SWI-Prolog Version 7

SWI-Prolog version 7 is a major release that introduces significant new concepts to the language. A full description is in the section SWI-Prolog extensions. Below is a short summary.

  • Lists are no longer represented as .(H,T). Instead, the list functor is now '[|]'(H, T). The empty list is still [], but this is not an atom. I.e., '[]' == [] fails.
  • By default, double quoted "text" is mapped to an object of type string. This already raised some discussions.
  • The system introduces `dicts' as primary citizens. Dicts are collections of key-value pairs, optionally tagged. Dicts are supported by read and write. The syntax is
    tag{key1:value1, key2:value2, ...}

    Keys in a dict can be addressed using the functional notation Dict.Key. User functions on dicts can be accessed as Dict.Compound (e.g., Vector.multiply(V2)).

  • Putting quotes around operator names that do not need quoting stops the atom to act as an operator:
    ?- A = 'dynamic'/1.
    A = (dynamic)/1.
    ?- op(100, xf, 'Kwh').
    true.
    ?- A = 100'Kwh'.
    A = 100 'Kwh'.
  • functor() is valid syntax. It produces a term that is distinct from 'functor'. The `block' operator '()' to hack this syntax has been deleted.
  • The `block' operators [] and {} remain.
See also
- SWI-Prolog future directions
- Daily builds for Windows
- Ubuntu PPA binary packages
- Build instructions