I forgot to mention the database format :
(You can understand it from the source, but I'll take a low profile as I provided no doc AT ALL :-)

*******database.txt**********
add_fact(theory=> qw(foo bar baz));
add_fact(theory=> qw(foo tac toe));
add_fact(theory=> qw(tic tac toe));
add_fact(theory=> qw(tac lac toe));
*******database.txt**********

Now a little example on how to use it :

*********try.pl**********
#!/usr/bin/perl -w
use strict;
#use Devel::StealthDebug;

use lib '.';

use Perlog;
use Perlog2;

#my $pg = AI::Perlog->new;
my $pg2 = AI::Perlog2->new;


#$pg->load_from_file('database.txt');
$pg2->load_from_file('database.txt');

#
# Perlog2 should definitly export display ;-)
#
AI::Perlog2::display($pg2->theory(qw/$x tac $y/));
print "*********\n";
AI::Perlog2::display($pg2->theory(qw/?  $x tac $y/));
print "*********\n";
AI::Perlog2::display($pg2->theory(qw/tic tac toe/));
print "*********\n";
AI::Perlog2::display($pg2->theory(qw/tIc tac toe/));
*********try.pl**********<br>

[download]

I've updated the display function's code in my previous post to handle 'false' answers.

"Only Bad Coders Code Badly In Perl" (OBC2BIP)

In reply to Re: AI::Perlog Unification help by arhuman
in thread AI::Perlog Unification help by Ovid

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.