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GNU Prolog for Java 0.2.5 alpha release

Item posted by Daniel Thomas <drt24> on Mon Aug 2 15:20:19 2010.

In our first release since 0.1.0 (2000-11-12) the GNU Prolog for Java project is proud to announce the release of an alpha version of our 0.2.5 release.

Prolog for Java is a java library (gnu.prolog) that allows Prolog code to be executed from within java. This allows for the use of Prolog to solve the problems which Prolog is particularly suited to while Java is used for other components.

It can be downloaded from or by ftp and is licensed under the LGPLv3.

The project website is:

NEWS since the last release:

0.2.5 alpha 2010-07-28
Conforms to ISO/IEC DIS 13211-1 : 1995 bar two minor bugs.
The demo package now contains an example of the use of the API.
The public key of the key signing key is in the sources.
Term classes now have working .toString() functions (which use TermWriter.toString(Term))
The Inria test suite provides an easily extensible test suite for testing standards
This supplements the vanilla test suite both of which can be found here:
NONISO features added:
ensure_loaded/1 predicate can be used anywhere
If ':- term' is used and term is not a directive then this will be treated as
':- intiailization(term)'.
random(L) predicate evaluates to a random number i such that 0 =< i < L
GNU Prolog for Java is now licensed under the LGPLv3 rather than the LGPLv2.
Two outstanding bugs in standards compliance are:
#30568 (inria tests on findall's throwing of type_errors fails) and
#30335 (inria tests on arg's unification of variables inside the compound term fail)
Michiel Hendriks wrote many additional features and added support for many more
predicates as well as doing a lot of work towards ISO Prolog part 1 compliance.
This includes: get_time/1, stamp_date_time/3, date_time_stamp/2, date_time_value/3,
format_time/3, format_time/4, parse_time/2, parse_time/3, trace/0, notrace/0,
tracing/0, spy/2, nospy/1, nospyall/0, various predicates for dialogs,
java_to_string/2, java_classname/2, listing/0, listing/1, compare/3, stacktrace/1,
current_functor/2, uuid/1, uuid/2, uuid_compare/3, uuid_version/2, uuid_variant/2
0.2.0 2009-03-04
Various changes, bug fixes and additions.
It now conforms to the "vanilla" test suite (with a few minor changes to some tests).
All ISO Prolog predicates are supported. char_conversion is implemented but not used.
Added support for tracing/spying predicates


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