GNU Prolog for Java

GNU Prolog for Java is an implementation of ISO Prolog as a Java library (gnu.prolog).


Source releases can be found on the main GNU server (HTTPSHTTPFTP) and its mirrors; please use a mirror if possible.

The GPG keys used to sign releases will be signed using the key signing key for GNU Prolog for Java, which has fingerprint BEBF A393 37E8 2048 D3B3 28F4 72C9 4F71 A10C 2B34.


Documentation for Prolog for Java is available online, as is documentation for most GNU software:

You may also find information about Prolog for Java by running info gnuprologjava, or by looking at /usr/share/doc/libgnuprolog-java/ or similar directories on your system.

Mailing lists

Prolog for Java has one mailing list: <> (web interface). It is used to discuss most aspects of Prolog for Java, including development.

Bug reports should be directed to the Savannah bug tracker, and support requests to the Savannah support tracker as first choices. However, if a preliminary email discussion is required or preferred, then use the info list.

Announcements about Prolog for Java and most other GNU software are made on <>.

To subscribe to these or any GNU mailing lists, please send an empty mail with a Subject: header of just “subscribe” to the relevant -request list. For example, to subscribe yourself to the GNU announcement list, you would send mail to <>. Or you can use the web interface.

Getting involved

Development of Prolog for Java, and GNU in general, is a volunteer effort, and you can contribute. For information, please read How to help GNU. If you'd like to get involved, it's a good idea to join the discussion mailing list (see above).

For development sources, bug and patch trackers, and other information, please see the Prolog for Java project page at

Prolog for Java is currently maintained by Pavan Kumar Gorakavi, Daniel Thomas and Matt Lilley. Please use the mailing list for contact.


Prolog for Java is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.