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Binaries
Windows version (64-bits)20,829,521 bytesSWI-Prolog 7.5.5 for Microsoft Windows (64 bit)

Self-installing executable for Microsoft's Vista/7/8/10 64-bit editions. See the reference manual for deciding on whether to use the 32- or 64-bits version. This binary is linked against GMP 5.0.5, which implies that it is covered by the LGPL-V3 license. See below.

Windows version (32-bits)19,510,025 bytesSWI-Prolog 7.5.5 for Microsoft Windows (32 bit)

Self-installing executable for MS-Windows. Installs swipl-win.exe and swipl.exe. Works on Windows Vista/7/8/10. This binary is linked against GMP 5.0.5, which implies that it is covered by the LGPL-V3 license. See below.

Snow Leopard and later23,718,946 bytesSWI-Prolog 7.5.5 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. Currently, version 2.7.7 is required. You can check the version by opening an X11 application and then checking `about' in the X11 menu. The graphical application is experimental. The bundle also provides the commandline tools in Contents/MacOS. The command line tools need at least MacOS 10.6 (Snow Leopard). The graphical application needs at least MacOS 10.7 (Lion).

Sources
Source archive16,670,599 bytesSWI-Prolog source for 7.5.4

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

Documentation
PDF file2,383,570 bytesSWI-Prolog 7.5.4 reference manual in PDF

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

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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