Logtalk 2.24.0 files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1282 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2005-04-22 23:57:45 +00:00
parent 08efcbeb64
commit c2e03a81b9
195 changed files with 4005 additions and 1219 deletions
--- a/Logtalk/examples/NOTES
+++ b/Logtalk/examples/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -71,6 +71,10 @@ diamonds
 dynpred
 	example of using some of the built-in database handling methods

+encodings
+	very simple example of using the new, experimental enconding/1 
+	directive (requires Logtalk to be run with the SWI-Prolog compiler)
+
 engines
 	example of category composition (importation of categories by other 
 	categories) using car engines
--- a/Logtalk/examples/aliases/NOTES
+++ b/Logtalk/examples/aliases/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/aliases/SCRIPT
+++ b/Logtalk/examples/aliases/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/assignvars/NOTES
+++ b/Logtalk/examples/assignvars/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/assignvars/SCRIPT
+++ b/Logtalk/examples/assignvars/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/benchmarks/NOTES
+++ b/Logtalk/examples/benchmarks/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -8,26 +8,20 @@ Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.

 To load this example and for sample queries, please see the SCRIPT file.

-If your Prolog compiler does not support a module system, then edit the 
-loader.lgt file and comment out the directive that loads the module code.
-In case your Prolog compiler supports a module system, you may need to 
-edit the code on the module.pl file and make any necessary compatibility 
-changes.
+This folder provides simple benchmark tests for comparing Logtalk message 
+sending performance with direct predicates calls in plain Prolog.
+These benchmarks may also be used for comparing Logtalk message sending 
+performance across Prolog compilers.

-This folder provides simple benchmarks for comparing Logtalk message 
-sending performance with direct calls to Prolog predicates and with 
-calls to module predicates. These benchmarks may also be used for 
-comparing Logtalk message sending performance across Prolog compilers.
+This example is made of five source files:

-This example is made of four source files:
-
-	benchmark.pl
+	benchmark.lgt
 		contains the benchmark predicates
-	plain.pl
+	plain.lgt
 		contains a definition for a list length predicate and a predicate 
 		for testing performance of the built-in predicates assertz/1 and 
 		retract/1
-	module.pl
+	module.pl (not loaded by default; see below)
 		contains the same definition of a list length predicate 
 		encapsulated in a module
 	object.lgt
@@ -37,8 +31,30 @@ This example is made of four source files:
 		contains predicates for testing the performance of the built-in 
 		database methods assertz/1 and retract/1

+You may have noticed above that the benchmark predicates and the predicates 
+for plain Prolog testing are both encapsulated in Logtalk source files. The 
+Logtalk compiler just copies the plain Prolog code to the generated Prolog 
+files. The reason for using the .lgt extension for these files is just to 
+make it possible to load all the example code using a single call to the 
+logtalk_load/1 predicate.

-The Prolog files above are loaded (from the loader.lgt file) by using 
-ensure_loaded/1 directives. If this directive is not supported on your 
-Prolog compiler, replace them by calls to the built-in predicate used 
-by your compiler to load Prolog code.
+By default, the benchmark tests on the SCRIPT file use a list of 30 elements 
+as an argument to the list length predicates. Increasing the list length 
+leads to decreasing performance differences between plain Prolog and Logtalk
+as the list length computation time far outweighs the overhead of the message 
+sending mechanism. Likewise, decreasing the list length leads to increasing 
+performance differences between plain Prolog and Logtalk (up to the point you 
+will be measuring the Logtalk message sending mechanism overhead compared to 
+plain Prolog predicate calls). In real-life applications, only testing can 
+give you a balanced view on the trade-offs between plain Prolog performance 
+and Logtalk programming features.
+
+By default, the loader.lgt file used to load the example code does not load 
+the module.pl file. Edit this file if your Prolog compiler supports a module 
+system and you want to run some comparative performance tests between plain 
+Prolog, Prolog modules, and Logtalk objects. Note that you may need to edit 
+the code on the module.pl file to make any necessary compatibility changes 
+for your Prolog compiler module system. For most Prolog module systems, the 
+performance of module calls is close or even identical to the performance of 
+plain Prolog calls, specially when using imported predicates as opposed to 
+using explicit module qualification.
--- a/Logtalk/examples/benchmarks/SCRIPT
+++ b/Logtalk/examples/benchmarks/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -12,66 +12,67 @@ Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 ...


+% run the default set of benchmark tests:
+
+| ?- benchmarks.
+...
+
+
+% or run specific benchmark tests individually as exemplified next...
+
+
 % call the predicate my_length/0 defined in the Prolog database:

-| ?- benchmark(my_length([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], _)).
+| ?- generate_list(30, List), benchmark(my_length(List, _)).
+
+Number of repetitions: 100000
+Loop time: 0.03 seconds
+Goal time: 0.39 seconds
+Average time per call: 3.6e-06 seconds
+Number of calls per second: 277777.777777778
+List = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29] ? 
+yes
+
+
+% call the predicate object::length/2 from the top-level:
+
+| ?- generate_list(30, List), benchmark(object::length(List, _)).

 Number of repetitions: 100000
 Loop time: 0.04 seconds
-Goal time: 0.31 seconds
-Average time per call: 2.7e-06 seconds
-Number of calls per second: 370370.370370371
+Goal time: 0.79 seconds
+Average time per call: 7.5e-06 seconds
+Number of calls per second: 133333.333333333
+List = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29] ? 
 yes


-% call the predicate module:mod_length/2 from top-level:
+% compiled call of the predicate object::length/2 (simulates message sending 
+% from a compiled object to another object; thus with no top-level overhead):

-| ?- benchmark(module:mod_length([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], _)).
+| ?- generate_list(30, List), benchmark('$lgt_send_to_object_nv'(object, length(List, _), user)).

 Number of repetitions: 100000
-Loop time: 0.04 seconds
-Goal time: 0.31 seconds
-Average time per call: 2.7e-06 seconds
-Number of calls per second: 370370.37037037
+Loop time: 0.0299999999999998 seconds
+Goal time: 0.5 seconds
+Average time per call: 4.70000000000001e-06 seconds
+Number of calls per second: 212765.957446808
+List = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29] ? 
 yes


-% call the predicate list::length/2 from top-level:
-
-| ?- benchmark(object::length([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], _)).
-
-Number of repetitions: 100000
-Loop time: 0.0600000000000005 seconds
-Goal time: 0.94 seconds
-Average time per call: 8.79999999999999e-06 seconds
-Number of calls per second: 113636.363636364
-yes
-
-
-% compiled call of the predicate list::length/2 (simulates message sending 
-% from a compiled object to another object; thus no top-level overhead):
-
-| ?- benchmark('$lgt_send_to_object_nv'(object, length([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], _), user)).
-
-Number of repetitions: 100000
-Loop time: 0.0499999999999972 seconds
-Goal time: 0.510000000000002 seconds
-Average time per call: 4.60000000000004e-06 seconds
-Number of calls per second: 217391.304347824
-yes
-
-
-% compiled call of the predicate list::length/2 (simulates message sending 
+% compiled call of the predicate object::length/2 (simulates message sending 
 % from a compiled object to another object with event-driven programming 
 % support switched off and with no top-level overhead):

-| ?- benchmark('$lgt_send_to_object_ne_nv'(object, length([1, 2, 3, 4, 5, 6, 7, 8, 9, 0], _), user)).
+| ?- generate_list(30, List), benchmark('$lgt_send_to_object_ne_nv'(object, length(List, _), user)).

 Number of repetitions: 100000
-Loop time: 0.0500000000000007 seconds
-Goal time: 0.43 seconds
-Average time per call: 3.79999999999999e-06 seconds
-Number of calls per second: 263157.894736843
+Loop time: 0.0300000000000002 seconds
+Goal time: 0.46 seconds
+Average time per call: 4.3e-06 seconds
+Number of calls per second: 232558.139534884
+List = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29] ? 
 yes


@@ -80,48 +81,56 @@ yes
 | ?- benchmark((create_object(xpto, [], [], []), abolish_object(xpto))).

 Number of repetitions: 100000
-Loop time: 0.039999999999992 seconds
-Goal time: 102.77 seconds
-Average time per call: 0.0010273 seconds
-Number of calls per second: 973.425484279178
+Loop time: 0.0300000000000011 seconds
+Goal time: 51.59 seconds
+Average time per call: 0.0005156 seconds
+Number of calls per second: 1939.48797517455
 yes


 % test assertz/1 and retract/1 performance in plain Prolog:

 | ?- benchmark(db_test_plain).
+
 Number of repetitions: 100000
-Loop time: 0.0599999999999454 seconds
-Goal time: 81.25 seconds
-Average time per call: 0.000811900000000001 seconds
-Number of calls per second: 1231.67877817465
+Loop time: 0.0299999999999727 seconds
+Goal time: 51.07 seconds
+Average time per call: 0.0005104 seconds
+Number of calls per second: 1959.24764890282
+yes


-% test assertz/1 and retract/1 performance in this:
+% test assertz/1 and retract/1 performance on "this" database:

 | ?- benchmark('$lgt_send_to_object_ne_nv'(database, db_test_this, user)).
+
 Number of repetitions: 100000
-Loop time: 0.0699999999999363 seconds
-Goal time: 92.03 seconds
-Average time per call: 0.0009196 seconds
-Number of calls per second: 1087.42931709439
+Loop time: 0.0299999999999727 seconds
+Goal time: 63.37 seconds
+Average time per call: 0.0006334 seconds
+Number of calls per second: 1578.78118092832
+yes


-% test assertz/1 and retract/1 performance in self:
+% test assertz/1 and retract/1 performance on "self" database:

 | ?- benchmark('$lgt_send_to_object_ne_nv'(database, db_test_self, user)).
+
 Number of repetitions: 100000
-Loop time: 0.0599999999999454 seconds
-Goal time: 111.92 seconds
-Average time per call: 0.0011186 seconds
-Number of calls per second: 893.974611121043
+Loop time: 0.0299999999999727 seconds
+Goal time: 71.3499999999999 seconds
+Average time per call: 0.000713199999999999 seconds
+Number of calls per second: 1402.13123948402
+yes


-% test assertz/1 and retract/1 performance using ::/2:
+% test assertz/1 and retract/1 performance on another object database (using ::/2):

 | ?- benchmark('$lgt_send_to_object_ne_nv'(database, db_test_obj, user)).
+
 Number of repetitions: 100000
-Loop time: 0.0600000000001728 seconds
-Goal time: 114.37 seconds
-Average time per call: 0.0011431 seconds
-Number of calls per second: 874.814102003327
+Loop time: 0.0299999999999727 seconds
+Goal time: 68.97 seconds
+Average time per call: 0.0006894 seconds
+Number of calls per second: 1450.53669857847
+yes
--- a/Logtalk/examples/benchmarks/benchmark.lgt
+++ b/Logtalk/examples/benchmarks/benchmark.lgt
@@ -0,0 +1,122 @@
+
+% benchmark a goal using a default number of repetitions and printing some 
+% useful statistics
+
+benchmark(Goal) :-
+	N = 100000,
+	benchmark(Goal, N, Looptime, Goaltime, Average, Speed),
+	report(Goal, N, Looptime, Goaltime, Average, Speed).
+
+
+benchmark(Goal, N) :-
+	benchmark(Goal, N, Looptime, Goaltime, Average, Speed),
+	report(Goal, N, Looptime, Goaltime, Average, Speed).
+	
+
+benchmark(Goal, N, Looptime, Goaltime, Average, Speed) :-
+	'$lgt_cpu_time'(Seconds1),		% defined in the config files
+	do_benchmark(N, true),
+	'$lgt_cpu_time'(Seconds2),
+	Looptime is Seconds2 - Seconds1,
+	'$lgt_cpu_time'(Seconds3),
+	do_benchmark(N, Goal),
+	'$lgt_cpu_time'(Seconds4),
+	Goaltime is Seconds4 - Seconds3,
+	Average is (Goaltime - Looptime)/N,
+	Speed is 1.0/Average.
+
+
+report(Id, Goal, N, Looptime, Goaltime, Average, Speed) :-
+	write(Id), write(': '),
+	report(Goal, N, Looptime, Goaltime, Average, Speed).
+
+
+report(Goal, N, Looptime, Goaltime, Average, Speed) :-
+	writeq(Goal), nl,
+	write('Number of repetitions: '), write(N), nl,
+	write('Loop time: '), write(Looptime), nl,
+	write('Goal time: '), write(Goaltime), nl,
+	write('Average time per call: '), write(Average), nl,
+	write('Number of calls per second: '), write(Speed), nl,
+	nl.
+
+
+% repeat a goal N times using a failure-driven loop to avoid the interference 
+% of Prolog compiler memory management mechanism (such as garbage collection) 
+% on the results
+
+do_benchmark(N, Goal) :-
+	repeat(N),		% another option would be to use a between/3 built-in predicate
+		call(Goal),
+	fail.
+
+do_benchmark(_, _).
+
+
+% some Prolog compilers define the predicate repeat/1 as a built-in predicate;
+% if that's the case of the Prolog compiler you are using, then comment out 
+% the definition that follows
+
+repeat(_).
+
+repeat(N) :-
+	N > 1,
+	N2 is N - 1,
+	repeat(N2).
+
+
+% generate a list containing the first N non-negative integers
+
+generate_list(N, List) :-
+	N >= 0,
+	generate_list(0, N, List).
+
+
+generate_list(N, N, []) :-
+	!.
+
+generate_list(M, N, [M| Ms]) :-
+	M < N,
+	M2 is M + 1,
+	generate_list(M2, N, Ms).
+
+
+% utility predicate for running all benchmark tests
+
+benchmarks :-
+	N = 100000,
+	benchmark_goal(Id, Goal),
+	benchmark(Goal, N, Looptime, Goaltime, Average, Speed),
+	report(Id, Goal, N, Looptime, Goaltime, Average, Speed),
+	fail.
+
+benchmarks.
+
+
+% some benchmark tests for static code:
+
+benchmark_goal('S1', my_length(List, _)) :-
+	generate_list(30, List).
+
+benchmark_goal('S2', object::length(List, _)) :-
+	generate_list(30, List).
+
+benchmark_goal('S3', '$lgt_send_to_object_nv'(object, length(List, _), user)) :-
+	generate_list(30, List).
+
+benchmark_goal('S4', '$lgt_send_to_object_ne_nv'(object, length(List, _), user)) :-
+	generate_list(30, List).
+
+
+% some benchmark tests for dynamic code:
+
+benchmark_goal('D1', (create_object(xpto, [], [], []), abolish_object(xpto))).
+
+benchmark_goal('D2', db_test_plain).
+
+benchmark_goal('D3', '$lgt_send_to_object_ne_nv'(database, db_test_this, user)).
+
+benchmark_goal('D4', '$lgt_send_to_object_ne_nv'(database, db_test_self, user)).
+
+benchmark_goal('D5', '$lgt_send_to_object_ne_nv'(database, db_test_obj, user)).
+
--- a/Logtalk/examples/benchmarks/benchmark.pl
+++ b/Logtalk/examples/benchmarks/benchmark.pl
@@ -1,45 +0,0 @@
-
-% benchmark a goal using a default number of repetitions and printing some 
-% useful statistics
-
-benchmark(Goal) :-
-	N = 100000,
-	write('Number of repetitions: '), write(N), nl,
-	'$lgt_cpu_time'(Seconds1),		% defined in the config files
-	benchmark(N, true),
-	'$lgt_cpu_time'(Seconds2),
-	Looptime is Seconds2 - Seconds1,
-	write('Loop time: '), write(Looptime), write(' seconds'), nl,
-	'$lgt_cpu_time'(Seconds3),
-	benchmark(N, Goal),
-	'$lgt_cpu_time'(Seconds4),
-	Goaltime is Seconds4 - Seconds3,
-	write('Goal time: '), write(Goaltime), write(' seconds'), nl,
-	Average is (Goaltime - Looptime)/N,
-	write('Average time per call: '), write(Average), write(' seconds'), nl,
-	Speed is 1.0/Average,
-	write('Number of calls per second: '), write(Speed), nl.
-
-
-% repeat a goal N times using a failure-driven loop to avoid the interference 
-% of Prolog compiler memory management mechanism (such as garbage collection) 
-% on the results
-
-benchmark(N, Goal) :-
-	repeat(N),		% another option would be to use a between/3 built-in predicate
-		call(Goal),
-	fail.
-
-benchmark(_, _).
-
-
-% some Prolog compilers define the predicate repeat/1 as a built-in predicate;
-% if that's the case of the Prolog compiler you are using, then comment out 
-% the definition that follows
-
-repeat(_).
-
-repeat(N) :-
-	N > 1,
-	N2 is N - 1,
-	repeat(N2).
--- a/Logtalk/examples/benchmarks/loader.lgt
+++ b/Logtalk/examples/benchmarks/loader.lgt
@@ -1,12 +1,10 @@

-% if your Prolog compiler does not support the ensure_loaded/1 directive
-% then simply consult the files
+% uncomment the next line if your Prolog compiler supports modules
+%:- ensure_loaded(module).

-:- ensure_loaded(benchmark).
-
-:- ensure_loaded(plain).
-
-% comment the next line if your Prolog compiler does not support modules
-:- ensure_loaded(module).
-
-:- initialization(logtalk_load([object, database])). 
+:- initialization(
+	logtalk_load([
+		benchmark,
+		plain,
+		object,
+		database])). 
--- a/Logtalk/examples/benchmarks/object.lgt
+++ b/Logtalk/examples/benchmarks/object.lgt
@@ -10,7 +10,7 @@
 			;
 			length(List, 0, Length).

-	make_list(0, []):-
+	make_list(0, []) :-
 		!.
 	make_list(N, [_| Tail]):-
 		M is N-1,
--- a/Logtalk/examples/benchmarks/plain.lgt
+++ b/Logtalk/examples/benchmarks/plain.lgt
--- a/Logtalk/examples/birds/NOTES
+++ b/Logtalk/examples/birds/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/birds/SCRIPT
+++ b/Logtalk/examples/birds/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/NOTES
+++ b/Logtalk/examples/bricks/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/bricks/SCRIPT
+++ b/Logtalk/examples/bricks/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/classvars/NOTES
+++ b/Logtalk/examples/classvars/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/classvars/SCRIPT
+++ b/Logtalk/examples/classvars/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/NOTES
+++ b/Logtalk/examples/dcgs/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dcgs/SCRIPT
+++ b/Logtalk/examples/dcgs/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/diamonds/NOTES
+++ b/Logtalk/examples/diamonds/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/diamonds/SCRIPT
+++ b/Logtalk/examples/diamonds/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/NOTES
+++ b/Logtalk/examples/dynpred/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/dynpred/SCRIPT
+++ b/Logtalk/examples/dynpred/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -29,7 +29,7 @@ Value = descendant
 yes


-% if we retract the local definition, again the inherited definition form root
+% if we retract the local definition, again the definition inherited from root
 % will be used:

 | ?- descendant::(retractall(p(_)), p(Value)).
--- a/Logtalk/examples/encodings/NOTES
+++ b/Logtalk/examples/encodings/NOTES
@@ -0,0 +1,20 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.24.0
+
+Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+To load this example and for sample queries, please see the SCRIPT file.
+
+This is a very simple example of using the new, experimental encoding/1 
+directive, which is fully based on the directive with the same name found 
+on recent development releases of SWI-Prolog. Currently, this example 
+requires Logtalk to be run with the SWI-Prolog compiler.
+
+The "babel.lgt" source file uses UTF-8 encoding. When browsing its code, 
+be sure to use a text editor that supports this encoding. In addition, 
+you may need to configure your text editor to open the source file using 
+this encoding. If you are using the SWI-Prolog GUI application on Windows, 
+be sure to select a font which supports Unicode characters.
--- a/Logtalk/examples/encodings/SCRIPT
+++ b/Logtalk/examples/encodings/SCRIPT
@@ -0,0 +1,46 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.24.0
+
+Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+% start by loading the example:
+
+| ?- logtalk_load(encodings(loader)).
+...
+
+
+% query the table of "Hello world!" messages:
+
+| ?- babel::hello_world(Code, Text).
+
+Code = el
+Text = 'Γειάσου κόσμος!' ;
+
+Code = en
+Text = 'Hello world!' ;
+
+Code = es
+Text = '¡Hola mundo!' ;
+
+Code = ja
+Text = 'こんにちは世界!' ;
+
+Code = ko
+Text = '여보세요 세계!' ;
+
+Code = nl
+Text = 'Hello wereld!' ;
+
+Code = pt
+Text = 'Olá mundo!' ;
+
+Code = ru
+Text = 'Здравствулте! мир!' ;
+
+Code = zh
+Text = '你好世界!'
+
+Yes
--- a/Logtalk/examples/encodings/babel.lgt
+++ b/Logtalk/examples/encodings/babel.lgt
@@ -0,0 +1,29 @@
+
+:- encoding(utf8).
+
+
+:- object(babel).
+
+	:- info([
+		version is 1.0,
+		author is 'Paulo Moura',
+		date is 2005/04/06,
+		comment is 'Simple test of the encoding/1 directive.']).
+
+	:- public(hello_world/2).
+	:- mode(hello_world(?atom, ?atom), zero_or_more).
+	:- info(hello_world/2, [
+		comment is 'Table of "hello world" messages in several languages (using ISO 639-2 two letter language codes for indexing).',
+		argnames is ['Language', 'Text']]).
+
+	hello_world(el, 'Γειάσου κόσμος!').
+	hello_world(en, 'Hello world!').
+	hello_world(es, '¡Hola mundo!').
+	hello_world(ja, 'こんにちは世界!').
+	hello_world(ko, '여보세요 세계!').
+	hello_world(nl, 'Hello wereld!').
+	hello_world(pt, 'Olá mundo!').
+	hello_world(ru, 'Здравствулте! мир!').
+	hello_world(zh, '你好世界!').
+
+:- end_object.
--- a/Logtalk/examples/encodings/loader.lgt
+++ b/Logtalk/examples/encodings/loader.lgt
@@ -0,0 +1,4 @@
+
+:- initialization(
+	logtalk_load([
+		babel])). 
--- a/Logtalk/examples/engines/NOTES
+++ b/Logtalk/examples/engines/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/engines/SCRIPT
+++ b/Logtalk/examples/engines/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/errors/NOTES
+++ b/Logtalk/examples/errors/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hello_world/NOTES
+++ b/Logtalk/examples/hello_world/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/hello_world/SCRIPT
+++ b/Logtalk/examples/hello_world/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/NOTES
+++ b/Logtalk/examples/inheritance/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/inheritance/SCRIPT
+++ b/Logtalk/examples/inheritance/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/NOTES
+++ b/Logtalk/examples/instmethods/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/instmethods/SCRIPT
+++ b/Logtalk/examples/instmethods/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/NOTES
+++ b/Logtalk/examples/lo/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/NOTES
+++ b/Logtalk/examples/lo/planner/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/planner/SCRIPT
+++ b/Logtalk/examples/lo/planner/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/NOTES
+++ b/Logtalk/examples/lo/travellers/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lo/travellers/SCRIPT
+++ b/Logtalk/examples/lo/travellers/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/NOTES
+++ b/Logtalk/examples/logic/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/logic/SCRIPT
+++ b/Logtalk/examples/logic/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/NOTES
+++ b/Logtalk/examples/lpa/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/lpa/SCRIPT
+++ b/Logtalk/examples/lpa/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/NOTES
+++ b/Logtalk/examples/metainterpreters/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metainterpreters/SCRIPT
+++ b/Logtalk/examples/metainterpreters/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metapredicates/NOTES
+++ b/Logtalk/examples/metapredicates/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/metapredicates/SCRIPT
+++ b/Logtalk/examples/metapredicates/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/mi/NOTES
+++ b/Logtalk/examples/mi/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/mi/SCRIPT
+++ b/Logtalk/examples/mi/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/NOTES
+++ b/Logtalk/examples/miscellaneous/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/miscellaneous/SCRIPT
+++ b/Logtalk/examples/miscellaneous/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/NOTES
+++ b/Logtalk/examples/msglog/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/msglog/SCRIPT
+++ b/Logtalk/examples/msglog/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/NOTES
+++ b/Logtalk/examples/operators/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/operators/SCRIPT
+++ b/Logtalk/examples/operators/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/NOTES
+++ b/Logtalk/examples/parametric/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/parametric/SCRIPT
+++ b/Logtalk/examples/parametric/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/NOTES
+++ b/Logtalk/examples/points/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/points/SCRIPT
+++ b/Logtalk/examples/points/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/NOTES
+++ b/Logtalk/examples/polygons/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/polygons/SCRIPT
+++ b/Logtalk/examples/polygons/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/NOTES
+++ b/Logtalk/examples/profiling/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/profiling/SCRIPT
+++ b/Logtalk/examples/profiling/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/puzzles/NOTES
+++ b/Logtalk/examples/puzzles/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/puzzles/SCRIPT
+++ b/Logtalk/examples/puzzles/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/reflection/NOTES
+++ b/Logtalk/examples/reflection/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/reflection/SCRIPT
+++ b/Logtalk/examples/reflection/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/NOTES
+++ b/Logtalk/examples/relations/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/relations/SCRIPT
+++ b/Logtalk/examples/relations/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/NOTES
+++ b/Logtalk/examples/roots/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/SCRIPT
+++ b/Logtalk/examples/roots/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/roots/class.lgt
+++ b/Logtalk/examples/roots/class.lgt
@@ -6,9 +6,9 @@


 	:- info([
-		version is 1.0,
+		version is 1.1,
 		author is 'Paulo Moura',
-		date is 2000/7/24,
+		date is 2005/3/12,
 		comment is 'Default metaclass for all classes.']).


@@ -83,7 +83,7 @@
 			atom_codes(Atom2, Codes2),
 			atom_concat(Functor, Atom2, Identifier),
 			atom_concat(Identifier, Atom, Prefix),
-			\+ current_predicate(Prefix/_),
+			\+ {current_predicate(Prefix/_)},
 			asserta(instance_counter_(Next)),
 		!.

@@ -93,7 +93,7 @@
 		number_codes(Arity, Codes),
 		atom_codes(Atom, Codes),
 		atom_concat(Functor, Atom, Prefix),
-		\+ current_predicate(Prefix/_).
+		\+ {current_predicate(Prefix/_)}.


 	next_integer(N, N1) :-
--- a/Logtalk/examples/searching/NOTES
+++ b/Logtalk/examples/searching/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/searching/SCRIPT
+++ b/Logtalk/examples/searching/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/NOTES
+++ b/Logtalk/examples/shapes/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/NOTES
+++ b/Logtalk/examples/shapes/ch/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ch/SCRIPT
+++ b/Logtalk/examples/shapes/ch/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/NOTES
+++ b/Logtalk/examples/shapes/ph/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/shapes/ph/SCRIPT
+++ b/Logtalk/examples/shapes/ph/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/NOTES
+++ b/Logtalk/examples/sicstus/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/sicstus/SCRIPT
+++ b/Logtalk/examples/sicstus/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/symdiff/NOTES
+++ b/Logtalk/examples/symdiff/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/symdiff/SCRIPT
+++ b/Logtalk/examples/symdiff/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/viewpoints/NOTES
+++ b/Logtalk/examples/viewpoints/NOTES
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================
--- a/Logtalk/examples/viewpoints/SCRIPT
+++ b/Logtalk/examples/viewpoints/SCRIPT
@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.23.1
+Release 2.24.0

 Copyright (c) 1998-2005 Paulo Moura.  All Rights Reserved.
 =================================================================