Logtalk 2.29.1 files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1744 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2006-12-28 13:03:34 +00:00
parent 7316eb490c
commit d79dd807e6
301 changed files with 6700 additions and 998 deletions
--- a/Logtalk/examples/NOTES.txt
+++ b/Logtalk/examples/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/aliases/NOTES.txt
+++ b/Logtalk/examples/aliases/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/aliases/SCRIPT.txt
+++ b/Logtalk/examples/aliases/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/assignvars/NOTES.txt
+++ b/Logtalk/examples/assignvars/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/assignvars/SCRIPT.txt
+++ b/Logtalk/examples/assignvars/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/benchmarks/NOTES.txt
+++ b/Logtalk/examples/benchmarks/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/benchmarks/SCRIPT.txt
+++ b/Logtalk/examples/benchmarks/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/birds/NOTES.txt
+++ b/Logtalk/examples/birds/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/birds/SCRIPT.txt
+++ b/Logtalk/examples/birds/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/NOTES.txt
+++ b/Logtalk/examples/bricks/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/SCRIPT.txt
+++ b/Logtalk/examples/bricks/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/bricks.lgt
+++ b/Logtalk/examples/bricks/bricks.lgt
@@ -107,11 +107,11 @@


 :- object(stack_monitor,
-	implements(event_handlersp)).
+	implements(monitoring)).

 	:- info([
-		version is 1.0,
-		date is 1998/3/23,
+		version is 1.1,
+		date is 2006/12/14,
 		author is 'Paulo Moura',
 		comment is 'Monitor for brick movements printing an ascii representation of each brick position.']).

--- a/Logtalk/examples/classvars/NOTES.txt
+++ b/Logtalk/examples/classvars/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/classvars/SCRIPT.txt
+++ b/Logtalk/examples/classvars/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/NOTES.txt
+++ b/Logtalk/examples/dcgs/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/SCRIPT.txt
+++ b/Logtalk/examples/dcgs/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -112,22 +112,22 @@ yes

 % parsing URLs:

-| ?- url::parse("http://www.logtalk.org", Components).
+| ?- url::parse("http://logtalk.org", Components).

 Components = [protocol(http), address([www, logtalk, org]), path([]), file('')] 
 yes

-| ?- url::parse("http://www.logtalk.org/", Components).
+| ?- url::parse("http://logtalk.org/", Components).

 Components = [protocol(http), address([www, logtalk, org]), path(['']), file('')] 
 yes

-| ?- url::parse("http://www.logtalk.org/cvs", Components).
+| ?- url::parse("http://logtalk.org/cvs", Components).

 Components = [protocol(http), address([www, logtalk, org]), path([cvs]), file('')] 
 yes

-| ?- url::parse("http://www.logtalk.org/cvs.html", Components).
+| ?- url::parse("http://logtalk.org/cvs.html", Components).

 Components = [protocol(http), address([www, logtalk, org]), path([]), file('cvs.html')] 
 yes
--- a/Logtalk/examples/diamonds/NOTES.txt
+++ b/Logtalk/examples/diamonds/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/diamonds/SCRIPT.txt
+++ b/Logtalk/examples/diamonds/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/NOTES.txt
+++ b/Logtalk/examples/dynpred/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/SCRIPT.txt
+++ b/Logtalk/examples/dynpred/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/encodings/NOTES.txt
+++ b/Logtalk/examples/encodings/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/encodings/SCRIPT.txt
+++ b/Logtalk/examples/encodings/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/engines/NOTES.txt
+++ b/Logtalk/examples/engines/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/engines/SCRIPT.txt
+++ b/Logtalk/examples/engines/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/errors/NOTES.txt
+++ b/Logtalk/examples/errors/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/errors/SCRIPT.txt
+++ b/Logtalk/examples/errors/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/errors/warnings.lgt
+++ b/Logtalk/examples/errors/warnings.lgt
@@ -25,7 +25,7 @@
 	% singleton variables in predicate clause
 	predicate(A) :-
 		write(C).
-	
+
 :- end_object.


--- a/Logtalk/examples/expansion/NOTES.txt
+++ b/Logtalk/examples/expansion/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/expansion/SCRIPT.txt
+++ b/Logtalk/examples/expansion/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hello_world/NOTES.txt
+++ b/Logtalk/examples/hello_world/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hello_world/SCRIPT.txt
+++ b/Logtalk/examples/hello_world/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hooks/NOTES.txt
+++ b/Logtalk/examples/hooks/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hooks/SCRIPT.txt
+++ b/Logtalk/examples/hooks/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/NOTES.txt
+++ b/Logtalk/examples/inheritance/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/SCRIPT.txt
+++ b/Logtalk/examples/inheritance/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/NOTES.txt
+++ b/Logtalk/examples/instmethods/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/SCRIPT.txt
+++ b/Logtalk/examples/instmethods/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/NOTES.txt
+++ b/Logtalk/examples/lo/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/NOTES.txt
+++ b/Logtalk/examples/lo/planner/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/SCRIPT.txt
+++ b/Logtalk/examples/lo/planner/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/NOTES.txt
+++ b/Logtalk/examples/lo/travellers/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/SCRIPT.txt
+++ b/Logtalk/examples/lo/travellers/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/NOTES.txt
+++ b/Logtalk/examples/logic/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/SCRIPT.txt
+++ b/Logtalk/examples/logic/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/NOTES.txt
+++ b/Logtalk/examples/lpa/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/faults/NOTES.txt
+++ b/Logtalk/examples/lpa/faults/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/faults/SCRIPT.txt
+++ b/Logtalk/examples/lpa/faults/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/timetables/NOTES.txt
+++ b/Logtalk/examples/lpa/timetables/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/timetables/SCRIPT.txt
+++ b/Logtalk/examples/lpa/timetables/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/NOTES.txt
+++ b/Logtalk/examples/metainterpreters/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/SCRIPT.txt
+++ b/Logtalk/examples/metainterpreters/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -89,7 +89,7 @@ no

 % another example: expert system rules:

-| rules::prove(weather(Wheather)).
+| ?- rules::prove(weather(Wheather)).

 Wheather = raining 
 yes
--- a/Logtalk/examples/metainterpreters/rules.lgt
+++ b/Logtalk/examples/metainterpreters/rules.lgt
@@ -34,6 +34,8 @@
 	:- public([weather/1, weekday/1, time/1, goto/1]).
 	:- dynamic([weather/1, weekday/1, time/1, goto/1]).

+	:- dynamic(if/1).
+
 	:- op(200,  fx, if).
 	:- op(100, xfx, then).

--- a/Logtalk/examples/metapredicates/NOTES.txt
+++ b/Logtalk/examples/metapredicates/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metapredicates/SCRIPT.txt
+++ b/Logtalk/examples/metapredicates/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -59,3 +59,30 @@ exit: sort([4,9],[4,9])
 Sorted = [1,2,3,4,9] ? 

 yes
+
+
+% call the meta-predicate apply/2 directly:
+
+| ?- meta::test_this.
+
+1, meta
+
+yes
+
+
+% send an apply/2 message to self:
+
+| ?- desc::test_self.
+
+2, desc
+
+yes
+
+
+% send an apply/2 message from another object:
+
+| ?- test::test_obj.
+
+3, test
+
+yes
--- a/Logtalk/examples/metapredicates/closures.lgt
+++ b/Logtalk/examples/metapredicates/closures.lgt
@@ -0,0 +1,56 @@
+
+/*	Logtalk meta-predicates accept not only goals but also closures
+	as meta-arguments as illustrated in this example
+*/
+
+
+:- object(meta).
+
+	% the meta_predicate/1 directive below changes the interpretation of meta-calls on apply/2
+	% clauses; the integer argument ("1") implies that the first argument is a closure that will 
+	% be used to construct a goal by appending exactly one additional argument
+
+	:- public(apply/2).
+	:- mode(apply(+callable, ?term), zero_or_more).
+	:- meta_predicate(apply(1, *)).
+
+	apply(Closure, Arg) :-		% the Logtalk compiler verifies that any closure which is a
+		call(Closure, Arg).		% meta-argument is used within a call/N method that honors the
+								% meta-predicate directive (in this case, apply(1, *) => call/2)
+
+	:- public(test_this/0).		% simple predicate for testing calls to a local meta-predicate
+
+	test_this :-
+		apply(foo(X), Y),
+		write((X, Y)), nl.
+
+	foo(1, meta).
+
+:- end_object.
+
+
+:- object(desc,
+	extends(meta)).	
+
+	:- public(test_self/0).		% simple predicate for testing calls to a meta-predicate
+								% defined in an ancestor object
+	test_self :-
+		::apply(foo(X), Y),
+		write((X, Y)), nl.
+
+	foo(2, desc).
+
+:- end_object.
+
+
+:- object(test).
+
+	:- public(test_obj/0).		% simple predicate for testing calls to a meta-predicate
+								% defined in another object
+	test_obj :-
+		meta::apply(foo(X), Y),
+		write((X, Y)), nl.
+
+	foo(3, test).
+
+:- end_object.
--- a/Logtalk/examples/metapredicates/loader.lgt
+++ b/Logtalk/examples/metapredicates/loader.lgt
@@ -1,13 +1,15 @@

 :- initialization(
-	logtalk_load(
-		[metapredicates])). 
+	logtalk_load([
+		closures,
+		metapredicates])). 

 /*
 If you intend to use the FOP XSL:FO processor for generating PDF documenting
 files, comment the directive above and uncomment the directive below

 :- initialization(
-	logtalk_load(
-		[metapredicates], [xmlsref(standalone)])).
+	logtalk_load([
+		closures,
+		metapredicates], [xmlsref(standalone)])).
 */
--- a/Logtalk/examples/mi/NOTES.txt
+++ b/Logtalk/examples/mi/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/mi/SCRIPT.txt
+++ b/Logtalk/examples/mi/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/NOTES.txt
+++ b/Logtalk/examples/miscellaneous/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/SCRIPT.txt
+++ b/Logtalk/examples/miscellaneous/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/modules/NOTES.txt
+++ b/Logtalk/examples/modules/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/modules/SCRIPT.txt
+++ b/Logtalk/examples/modules/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/NOTES.txt
+++ b/Logtalk/examples/msglog/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/SCRIPT.txt
+++ b/Logtalk/examples/msglog/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/NOTES.txt
+++ b/Logtalk/examples/operators/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/SCRIPT.txt
+++ b/Logtalk/examples/operators/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/NOTES.txt
+++ b/Logtalk/examples/parametric/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/SCRIPT.txt
+++ b/Logtalk/examples/parametric/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/NOTES.txt
+++ b/Logtalk/examples/points/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/SCRIPT.txt
+++ b/Logtalk/examples/points/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/NOTES.txt
+++ b/Logtalk/examples/polygons/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/SCRIPT.txt
+++ b/Logtalk/examples/polygons/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/NOTES.txt
+++ b/Logtalk/examples/profiling/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/SCRIPT.txt
+++ b/Logtalk/examples/profiling/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/message_counter.lgt
+++ b/Logtalk/examples/profiling/message_counter.lgt
@@ -1,13 +1,13 @@

 :- object(message_counter,
-	implements(event_handlersp),
+	implements(monitoring),
 	imports(monitor)).


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 1998/3/23,
+		date is 2006/12/14,
 		comment is 'Message counter monitor.']).


--- a/Logtalk/examples/profiling/stop_watch.lgt
+++ b/Logtalk/examples/profiling/stop_watch.lgt
@@ -1,13 +1,13 @@

 :- object(stop_watch,
-	implements(event_handlersp),
+	implements(monitoring),
 	imports(monitor)).


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 1998/3/23,
+		date is 2006/12/14,
 		comment is 'Message executing time monitor.']).


--- a/Logtalk/examples/proxies/NOTES.txt
+++ b/Logtalk/examples/proxies/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/proxies/SCRIPT.txt
+++ b/Logtalk/examples/proxies/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/proxies/proxies.lgt
+++ b/Logtalk/examples/proxies/proxies.lgt
@@ -1,4 +1,7 @@

+% we use a parametric object in order to give an interpretation to an 
+% object proxy arguments and to encapsulate relevant predicates:
+
 :- object(circle(_Radius, _Color)).

 	:- public([
--- a/Logtalk/examples/puzzles/NOTES.txt
+++ b/Logtalk/examples/puzzles/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/puzzles/SCRIPT.txt
+++ b/Logtalk/examples/puzzles/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/reflection/NOTES.txt
+++ b/Logtalk/examples/reflection/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/reflection/SCRIPT.txt
+++ b/Logtalk/examples/reflection/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/NOTES.txt
+++ b/Logtalk/examples/relations/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/SCRIPT.txt
+++ b/Logtalk/examples/relations/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/relations.lgt
+++ b/Logtalk/examples/relations/relations.lgt
@@ -209,13 +209,13 @@


 :- object(relation,
-	implements(relationp),
+	implements(relationp, monitoring),
 	instantiates(class),
 	specializes(object)).

 	:- info([
-		version is 1.2,
-		date is 2004/8/15,
+		version is 1.3,
+		date is 2006/12/16,
 		author is 'Esteban Zimanyi, Paulo Moura',
 		comment is 'Enables the representation of relations between independent objects.']).

@@ -617,12 +617,13 @@


 :- object(constrained_relation,
+	implements(monitoring),
 	instantiates(class),
 	specializes(relation)).

 	:- info([
-		version is 3.2,
-		date is 2005/1/29,
+		version is 3.3,
+		date is 2006/12/16,
 		author is 'Paulo Moura',
 		comment is 'Enables the representation of relations with constraints on the state of participating objects.']).

--- a/Logtalk/examples/roots/NOTES.txt
+++ b/Logtalk/examples/roots/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/SCRIPT.txt
+++ b/Logtalk/examples/roots/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/classes.lgt
+++ b/Logtalk/examples/roots/classes.lgt
@@ -241,13 +241,13 @@


 :- object(object,
-	implements(objectp, event_handlersp),
+	implements(objectp, monitoring),
 	imports(initialization, class_hierarchy),
 	instantiates(class)).

 	:- info([
-		version is 1.0,
-		date is 2000/7/24,
+		version is 1.1,
+		date is 2006/12/14,
 		author is 'Paulo Moura',
 		comment is 'Minimal predicates for all objects. Default root of the inheritance graph.']).

--- a/Logtalk/examples/roots/prototypes.lgt
+++ b/Logtalk/examples/roots/prototypes.lgt
@@ -23,12 +23,12 @@


 :- object(proto,
-	implements(protop, event_handlersp),
+	implements(protop, monitoring),
 	imports(initialization, proto_hierarchy)).

 	:- info([
-		version is 1.1,
-		date is 2005/10/22,
+		version is 1.2,
+		date is 2006/12/14,
 		author is 'Paulo Moura',
 		comment is 'Minimal predicates for all prototypes. Default root of the extension graph.']).

--- a/Logtalk/examples/searching/NOTES.txt
+++ b/Logtalk/examples/searching/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/SCRIPT.txt
+++ b/Logtalk/examples/searching/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/performance.lgt
+++ b/Logtalk/examples/searching/performance.lgt
@@ -1,12 +1,12 @@

 :- object(performance,
-	implements(event_handlersp)).
+	implements(monitoring)).


 	:- info([
-		version is 1.2,
+		version is 1.3,
 		author is 'Paulo Moura',
-		date is 2005/12/19,
+		date is 2006/12/14,
 		comment is 'Performance monitor for state space searches.']).


--- a/Logtalk/examples/shapes/NOTES.txt
+++ b/Logtalk/examples/shapes/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/NOTES.txt
+++ b/Logtalk/examples/shapes/ch/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/SCRIPT.txt
+++ b/Logtalk/examples/shapes/ch/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/NOTES.txt
+++ b/Logtalk/examples/shapes/ph/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/SCRIPT.txt
+++ b/Logtalk/examples/shapes/ph/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/NOTES.txt
+++ b/Logtalk/examples/sicstus/NOTES.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/SCRIPT.txt
+++ b/Logtalk/examples/sicstus/SCRIPT.txt
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.28.2
+Release 2.29.1

 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Show More
+++ b/Show More