# SWI-Prolog: A comprehensive Prolog implementation

Latest update: May 31, 2016 (Version 7.3.22)

## Web home

Please find the up-to-date information on SWI-Prolog at
http://www.swi-prolog.org.

## Documentation

Documentation  is  available  from  several  locations  and  in  several
formats.

  - Paper format can be ordered as [print on
  demand](http://books.google.de/books?id=7AeiAwAAQBAJ&hl=en) and is
  available as PDF from the [download
  page](http://www.swi-prolog.org/download/devel).

  - Several tutorials can be accessed from the __Tutorials__ menu on
  the [home page](http://www.swi-prolog.org)

  - A HTML version of the documentation is in the `doc/Manual` directory
  of the installation.  Note that some packagers put this documentation
  elsewhere or require it to be installed seperately.

You can also install the website locally to  use its richness if you are
offline. It is available from https://github.com/SWI-Prolog/plweb.
