Did you know ... Search Documentation:
Download SWI-Prolog development versions

linux.png We collect information about available packages and issues for building on specific distros here. We provide a PPA for Ubuntu

WIP.png Examine the ChangeLog.


Binaries
Windows version (64-bits)11,683,585 bytesSWI-Prolog 7.7.21-1 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:e7ca26f2ff4ee915f5b7dcba9f2b2a71caeb4b31c2afa4fe9d486ad92363d3cd
Windows version (32-bits)11,393,699 bytesSWI-Prolog 7.7.21-1 for Microsoft Windows (32 bit)

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

SHA256:8370a087774ac5d188ebe1da1645f3973dae1c91ec87d22dc7b4b6995dc7d5f8
Snow Leopard and later23,148,234 bytesSWI-Prolog 7.7.21-1 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:bdadac82bead807d5bebd2878a3784b65ffd6e69b344e048a48b08cd225d9783
Sources
Source archive16,661,560 bytesSWI-Prolog source for 7.7.21

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

SHA256:f4795d3e6abe9289729169a9d74a006e55df95a2e118b7a1701bb7bd92c864f4
Documentation
PDF file2,467,458 bytesSWI-Prolog 7.7.21 reference manual in PDF

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

Show all files
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