Logtalk 2.28.2 files.

git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1712 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

Logtalk/BIBLIOGRAPHY.bib

@@ -6,6 +6,27 @@
 }
 
 
+@inproceedings{pmoura06,
+	author = "Paulo Moura and Vincent Marchetti",
+	title = "Logtalk Processing of STEP Part 21 Files",
+	crossref = "iclp06",
+	pages = "453--454",
+}
+
+
+@proceedings{iclp06,
+	title = "International Conference on Logic Programming 2006",
+	booktitle = "International Conference on Logic Programming 2006",
+	series = "Lecture Notes in Computer Science",
+	publisher = "Springer-Verlag",
+	address = "Berlin Heidelberg",
+	editor = "S. Etalle and M. Truszczy\'nski",
+	number = 4079,
+	month = aug,
+	year = 2006
+}
+
+
 @phdthesis{pmoura03,
 	author = "Paulo Moura",
 	title = "{Logtalk - Design of an Object-Oriented Logic Programming Language}",

Logtalk/CUSTOMIZE.txt

@@ -0,0 +1,62 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.28.2
+
+Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+This file contains detailed instructions for customizing your Logtalk 
+installation and working environment. Customization is mostly done on 
+a per-user basis by editing files on the Logtalk user folder (whose 
+path is sorted on the LOGTALKUSER environment variable).
+
+
+1. SETTING LIBRARY PATHS
+
+In Logtalk, a library is simply a directory containing source files. Library 
+paths can be declared using a dynamic predicate. This allows compiling and 
+loading of libraries and library files to be performed without worries about 
+library paths.
+
+Inside your Logtalk user folder, you will find a "libpaths" folder containing 
+a sample file which, when loaded, defines the library paths for the Logtalk 
+standard library and for all the supplied examples. This file may need to be 
+edited to match both your Logtalk installation and your Prolog compiler and 
+operating-system requirements. For details, see the file "libpaths/NOTES".
+
+
+2. CUSTOMIZING PROLOG CONFIGURATION FILES
+
+Logtalk interfaces with a specific Prolog compiler via a configuration file 
+that can be found on the "configs" folder inside your Logtalk user folder.
+These configuration files can be customized by changing the values of the 
+default flags that are used by Logtalk when compiling source files. For a 
+full description of these default flags, consult the "Running and debugging 
+Logtalk programs" section of the User Manual. Some of the default flags that 
+you may want to change include: "smart_compilation", "startup_message", 
+"portability", "underscore_vars", "altdirs", and the set of documentation-
+related flags ("xmldocs", "xslfile", "xmlspec", and "xmlsref"). Be sure to 
+read the "configs/NOTES" file for Prolog specific notes; some Prolog compilers
+do not support the whole range of compilation flag values.  
+
+
+3. CUSTOMIZING DOCUMENTATION PROCESSING SCRIPTS AND SUPPORTING FILES
+
+Inside your Logtalk user folder, you will find a "xml" folder containing a 
+set of shell scripts, CSS and XSLT style-sheets, and DTD and XML Schema files 
+for processing the XML documenting files that are automatically generated 
+when you compile source files. You may want to customize the CSS and XSLT 
+files to modify the layout or style of the resulting PDF/(X)HTML files or to 
+write new scripts and transformations to generate other formats. You may also 
+edit the file "custom.ent" in order to specify XML entities for your personal 
+data that can be used on Logtalk documenting directives. For details, see the 
+file "xml/NOTES".
+
+
+4. ADDING SUPPORT FOR EDITING LOGTALK SOURCE FILES TO TEXT EDITORS
+
+Inside your Logtalk user folder, you will find a "wenv" folder, containing 
+configuration files for several text editors, which add support for syntax 
+coloring and other editing services of Logtalk source files. For details, 
+see the file "wenv/NOTES".

Logtalk/INSTALL.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -162,41 +162,7 @@ This assumes that your favorite Prolog compilers are supported by the
 the steps described in the "QUICK_START" file.
 
 
-5. SETTING LIBRARY PATHS
+5. CUSTOMIZING LOGTALK
 
-In Logtalk, a library is simply a directory containing source files. Library 
+Please see the file "CUSTOMIZE.txt" for details on how to customize your 
-paths can be declared using a dynamic predicate. This allows compiling and 
+Logtalk installation and working environment.
-loading of libraries and library files to be performed without worries about 
-library paths. Assuming that you have used the "scripts/cplgtdirs.*" shell 
-scripts for making a copy of the user-modifiable Logtalk files, you will find 
-in the "$LOGTALKUSER/libpaths" directory a sample file which, when loaded, 
-defines the library paths for the Logtalk standard library and for all the 
-supplied examples. This file may need to be edited to match your Logtalk 
-installation and your Prolog compiler and operating-system requirements. For 
-more details, see the file "$LOGTALKUSER/libpaths/NOTES".
-
-
-6. CUSTOMIZING PROLOG CONFIGURATION FILES
-
-Logtalk interfaces with a specific Prolog compiler via a configuration file 
-that can be found on the "$LOGTALKUSER/configs" directory. These configuration 
-files can be customized by changing the values of the default flags that are 
-used by Logtalk when compiling source files. For a full description of these 
-default flags, consult the "Running and debugging Logtalk programs" section of 
-the User Manual. Some of the default flags that you may want to change are: 
-"smart_compilation", "startup_message", "portability", "underscore_vars", 
-"altdirs", and the set of documentation-related flags ("xmldocs", "xslfile", 
-"xmlspec", and "xmlsref"). Be sure to read the "$LOGTALKUSER/configs/NOTES" 
-file for Prolog specific notes; some Prolog compilers do not support the whole
-range of compilation flag values.  
-
-
-7. CUSTOMIZING DOCUMENTATION PROCESSING SCRIPTS AND SUPPORTING FILES
-
-Logtalk provides, in the "$LOGTALKUSER/xml" directory, a set of shell scripts, 
-CSS and XSLT style-sheets, and DTD and XML Schema files for processing the XML 
-documenting files that are automatically generated when you compile source 
-files. You may want to customize these CSS and XSLT files to modify the layout 
-or style of the resulting PDF/(X)HTML files or to write new scripts and 
-transformations to generate other formats. For more details, see the file 
-"$LOGTALKUSER/xml/NOTES".

Logtalk/LICENSE

@@ -1,214 +0,0 @@
-
-                            The Artistic License
-                         Version 2.0beta5, October 2001
-
-          Copyright (C) 2000, 2001 Larry Wall, Bradley M. Kuhn.
-       Everyone is permitted to copy and distribute verbatim copies
-        of this license document, but changing it is not allowed.
-
-                                  Preamble
-
-This copyright license states the terms under which a given free software
-Package may be copied, modified and/or redistributed, while the
-Originator(s) maintain some artistic control over the future development of
-that Package (at least as much artistic control as can be given under
-copyright law while still making the Package open source and free software).
-
-This license is bound by copyright law, and thus it legally applies only to
-works which the copyright holder has permitted copying, distribution or
-modification under the terms of the Artistic License, Version 2.0.
-
-You are reminded that You are always permitted to make arrangements wholly
-outside of a given copyright license directly with the copyright holder(s)
-of a given Package.  If the terms of this license impede your ability to
-make full use of the Package, You are encouraged to contact the copyright
-holder(s) and seek a different licensing arrangement.
-
-
-                                Definitions
-
-"Package" refers to the collection of files distributed by the
-          Originator(s), and derivatives of that collection of files created
-          through textual modification.
-
-"Standard Version" refers to the Package if it has not been modified, or has
-                   been modified only in ways suggested by the
-                   Originator(s).
-
-"Modified Version" refers to the Package, if it has been changed by You via
-                   textual modification of the source code, and such changes
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-"Originator"       refers to the author(s) and/or copyright holder(s) of the
-                   Standard Version of the Package.
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-                 modify the Package.
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-"Distribution Fee" is any fee that You charge for providing a copy of this
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-"Freely Available" means that:
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-           corresponding machine-readable source code is included with the
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-      Modified Versions for any purpose without restriction, provided that
-      you do not redistribute the Modified Version to others outside of your
-      company or organization.
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-      Standard Version of this Package in any medium without restriction,
-      either gratis or for a Distribution Fee, provided that you duplicate
-      all of the original copyright notices and associated disclaimers.  At
-      Your discretion, such verbatim copies may or may not include compiled
-      bytecode, object code or binary versions of the corresponding source
-      code in the same medium.
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-      If Your Modified Version is in turn derived from a Modified Version
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-      Modified Version complies with the requirements of this license.
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-      carrying our such distribution, become invalid, you must provide new
-      instructions on demand or cease further distribution.  If You cease
-      distribution within thirty days after You become aware that the
-      instructions are invalid, then You do not forfeit any of Your rights
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-      the following:
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-           does not conflict in any way with an installation of the Standard
-           Version, include for each program installed by the Modified
-           Version clear documentation describing how it differs from the
-           Standard Version, and rename your Modified Version so that the
-           name is substantially different from the Standard Version.
-
-       (c) ensure that the Modified Version includes notification of the
-           changes made from the Standard Version, and offer to provide
-           machine-readable source code (under a license that permits making
-           that source code Freely Available) of the Modified Version via
-           mail order.
-
-
-        Permissions for Inclusion of the Package in Aggregate Works
-
-  (7) You may aggregate this Package (either the Standard Version or
-      Modified Version) with other packages and distribute the resulting
-      aggregation provided that You do not charge a licensing fee for the
-      Package.  Distribution Fees are permitted, and licensing fees for
-      other packages in the aggregation are permitted.  Your permission to
-      distribute Standard or Modified Versions of the Package is still
-      subject to the other terms set forth in other sections of this
-      license.
-
-  (8) In addition to the permissions given elsewhere by this license, You
-      are also permitted to link Modified and Standard Versions of this
-      Package with other works and distribute the result without
-      restriction, provided You have produced binary program(s) that do not
-      overtly expose the interfaces of the Package.  This includes
-      permission to embed the Package in a larger work of your own without
-      exposing a direct interface to the Package.  This also includes
-      permission to build stand-alone binary or bytecode versions of your
-      scripts that require the Package, but do not otherwise give the casual
-      user direct access to the Package itself.
-
-
-        Items That are Never Considered Part of a Modified Version Package
-
-  (9) Works (including, but not limited to, subroutines and scripts) that
-      you have linked or aggregated with the Package that merely extend or
-      make use of the Package, but are not intended to cause the Package to
-      operate differently from the Standard Version, do not, by themselves,
-      cause the Package to be a Modified Version.  In addition, such works
-      are not considered parts of the Package itself, and are not bound by
-      the terms of the Package's license.
-
-
-              Acceptance of License and Disclaimer of Warranty
-
- (10) You are not required to accept this License, since you have not signed
-      it.  However, nothing else grants you permission to copy, modify or
-      distribute the Standard or Modified Versions of the Package.  These
-      actions are prohibited by copyright law if you do not accept this
-      License.  Therefore, by copying, modifying or distributing Standard
-      and Modified Versions of the Package, you indicate your acceptance of
-      the license of the Package.
-
-
- (11) Disclaimer of Warranty:
-
-       THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-       "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-       LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-       A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT UNLESS REQUIRED BY
-       LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER OR CONTRIBUTOR
-       BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
-       OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
-       OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, PROFITS; OR
-       BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-       WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
-       OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
-       EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Logtalk/LICENSE.txt

@@ -0,0 +1,201 @@
+		       The Artistic License 2.0
+
+	    Copyright (c) 2000-2006, The Perl Foundation.
+
+     Everyone is permitted to copy and distribute verbatim copies
+      of this license document, but changing it is not allowed.
+
+Preamble
+
+This license establishes the terms under which a given free software
+Package may be copied, modified, distributed, and/or redistributed.
+The intent is that the Copyright Holder maintains some artistic
+control over the development of that Package while still keeping the
+Package available as open source and free software.
+
+You are always permitted to make arrangements wholly outside of this
+license directly with the Copyright Holder of a given Package.  If the
+terms of this license do not permit the full use that you propose to
+make of the Package, you should contact the Copyright Holder and seek
+a different licensing arrangement. 
+
+Definitions
+
+    "Copyright Holder" means the individual(s) or organization(s)
+    named in the copyright notice for the entire Package.
+
+    "Contributor" means any party that has contributed code or other
+    material to the Package, in accordance with the Copyright Holder's
+    procedures.
+
+    "You" and "your" means any person who would like to copy,
+    distribute, or modify the Package.
+
+    "Package" means the collection of files distributed by the
+    Copyright Holder, and derivatives of that collection and/or of
+    those files. A given Package may consist of either the Standard
+    Version, or a Modified Version.
+
+    "Distribute" means providing a copy of the Package or making it
+    accessible to anyone else, or in the case of a company or
+    organization, to others outside of your company or organization.
+
+    "Distributor Fee" means any fee that you charge for Distributing
+    this Package or providing support for this Package to another
+    party.  It does not mean licensing fees.
+
+    "Standard Version" refers to the Package if it has not been
+    modified, or has been modified only in ways explicitly requested
+    by the Copyright Holder.
+
+    "Modified Version" means the Package, if it has been changed, and
+    such changes were not explicitly requested by the Copyright
+    Holder. 
+
+    "Original License" means this Artistic License as Distributed with
+    the Standard Version of the Package, in its current version or as
+    it may be modified by The Perl Foundation in the future.
+
+    "Source" form means the source code, documentation source, and
+    configuration files for the Package.
+
+    "Compiled" form means the compiled bytecode, object code, binary,
+    or any other form resulting from mechanical transformation or
+    translation of the Source form.
+
+
+Permission for Use and Modification Without Distribution
+
+(1)  You are permitted to use the Standard Version and create and use
+Modified Versions for any purpose without restriction, provided that
+you do not Distribute the Modified Version.
+
+
+Permissions for Redistribution of the Standard Version
+
+(2)  You may Distribute verbatim copies of the Source form of the
+Standard Version of this Package in any medium without restriction,
+either gratis or for a Distributor Fee, provided that you duplicate
+all of the original copyright notices and associated disclaimers.  At
+your discretion, such verbatim copies may or may not include a
+Compiled form of the Package.
+
+(3)  You may apply any bug fixes, portability changes, and other
+modifications made available from the Copyright Holder.  The resulting
+Package will still be considered the Standard Version, and as such
+will be subject to the Original License.
+
+
+Distribution of Modified Versions of the Package as Source 
+
+(4)  You may Distribute your Modified Version as Source (either gratis
+or for a Distributor Fee, and with or without a Compiled form of the
+Modified Version) provided that you clearly document how it differs
+from the Standard Version, including, but not limited to, documenting
+any non-standard features, executables, or modules, and provided that
+you do at least ONE of the following:
+
+    (a)  make the Modified Version available to the Copyright Holder
+    of the Standard Version, under the Original License, so that the
+    Copyright Holder may include your modifications in the Standard
+    Version.
+
+    (b)  ensure that installation of your Modified Version does not
+    prevent the user installing or running the Standard Version. In
+    addition, the Modified Version must bear a name that is different
+    from the name of the Standard Version.
+
+    (c)  allow anyone who receives a copy of the Modified Version to
+    make the Source form of the Modified Version available to others
+    under
+		
+	(i)  the Original License or
+
+	(ii)  a license that permits the licensee to freely copy,
+	modify and redistribute the Modified Version using the same
+	licensing terms that apply to the copy that the licensee
+	received, and requires that the Source form of the Modified
+	Version, and of any works derived from it, be made freely
+	available in that license fees are prohibited but Distributor
+	Fees are allowed.
+
+
+Distribution of Compiled Forms of the Standard Version 
+or Modified Versions without the Source
+
+(5)  You may Distribute Compiled forms of the Standard Version without
+the Source, provided that you include complete instructions on how to
+get the Source of the Standard Version.  Such instructions must be
+valid at the time of your distribution.  If these instructions, at any
+time while you are carrying out such distribution, become invalid, you
+must provide new instructions on demand or cease further distribution.
+If you provide valid instructions or cease distribution within thirty
+days after you become aware that the instructions are invalid, then
+you do not forfeit any of your rights under this license.
+
+(6)  You may Distribute a Modified Version in Compiled form without
+the Source, provided that you comply with Section 4 with respect to
+the Source of the Modified Version.
+
+
+Aggregating or Linking the Package 
+
+(7)  You may aggregate the Package (either the Standard Version or
+Modified Version) with other packages and Distribute the resulting
+aggregation provided that you do not charge a licensing fee for the
+Package.  Distributor Fees are permitted, and licensing fees for other
+components in the aggregation are permitted. The terms of this license
+apply to the use and Distribution of the Standard or Modified Versions
+as included in the aggregation.
+
+(8) You are permitted to link Modified and Standard Versions with
+other works, to embed the Package in a larger work of your own, or to
+build stand-alone binary or bytecode versions of applications that
+include the Package, and Distribute the result without restriction,
+provided the result does not expose a direct interface to the Package.
+
+
+Items That are Not Considered Part of a Modified Version 
+
+(9) Works (including, but not limited to, modules and scripts) that
+merely extend or make use of the Package, do not, by themselves, cause
+the Package to be a Modified Version.  In addition, such works are not
+considered parts of the Package itself, and are not subject to the
+terms of this license.
+
+
+General Provisions
+
+(10)  Any use, modification, and distribution of the Standard or
+Modified Versions is governed by this Artistic License. By using,
+modifying or distributing the Package, you accept this license. Do not
+use, modify, or distribute the Package, if you do not accept this
+license.
+
+(11)  If your Modified Version has been derived from a Modified
+Version made by someone other than you, you are nevertheless required
+to ensure that your Modified Version complies with the requirements of
+this license.
+
+(12)  This license does not grant you the right to use any trademark,
+service mark, tradename, or logo of the Copyright Holder.
+
+(13)  This license includes the non-exclusive, worldwide,
+free-of-charge patent license to make, have made, use, offer to sell,
+sell, import and otherwise transfer the Package with respect to any
+patent claims licensable by the Copyright Holder that are necessarily
+infringed by the Package. If you institute patent litigation
+(including a cross-claim or counterclaim) against any party alleging
+that the Package constitutes direct or contributory patent
+infringement, then this Artistic License to you shall terminate on the
+date that such litigation is filed.
+
+(14)  Disclaimer of Warranty:
+THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
+IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED
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+NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL
+LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF
+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Logtalk/QUICK_START.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/README.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -13,11 +13,12 @@ CONTENTS
  3. Registration
  4. Support
  5. Installation
- 6. Quick start
+ 6. Customization
- 7. Documentation
+ 7. Quick start
- 8. Upgrading
+ 8. Documentation
- 9. Citations
+ 9. Upgrading
-10. Contributions
+10. Citations
+11. Contributions
 
 
 1. LICENSE
@@ -33,7 +34,7 @@ stated.
 
 The latest release of the Logtalk package is always available at the URL:
 
-    http://www.logtalk.org/
+    http://logtalk.org/
 
 At this address you can also find additional documentation and information
 about Logtalk.
@@ -58,9 +59,9 @@ platforms (mac, pc, unix,...) (optional)
 Logtalk support is available for registered users via email to 
 support@logtalk.org.
 
-At the URL http://www.logtalk.org/bugs.html you can find a list of known 
+At the URL http://logtalk.org/bugs.html you can find a list of known 
 problems and download bug fixes. The latest news about Logtalk are
-available at the URL http://www.logtalk.org/news.html.
+available at the URL http://logtalk.org/news.html.
 
 There is also a mailing list, "logtalk", used to announce new releases and
 bug fixes and for discussion between registered Logtalk users, that you 
@@ -78,11 +79,9 @@ with just the word "help" in the subject or in the message body.
 
 5. INSTALLATION
 
-Installing Logtalk is just a matter of uncompressing/unpacking the 
+Logtalk can be installed either from sources by running a few shell scripts 
-distribution archive file for your operating system and running a 
+or by using one of the provided installers, depending on your operating 
-few shell scripts. You may install Logtalk in any directory that 
+system. See the file "INSTALL.txt" for detailed instructions.
-you find convenient. See the file INSTALL for detailed instructions 
-on how to customize your working environment.
 
 See the user manual for a description of the source files organization 
 and for using instructions (to read the user manual open the file 
@@ -90,36 +89,43 @@ and for using instructions (to read the user manual open the file
 using four-space tabs.
 
 
-6. QUICK START
+6. CUSTOMIZATION
 
-The file QUICK_START provides quick instructions for those of you in a hurry 
+The file "CUSTOMIZE.txt" provides detailed instructions for customizing the  
-to run Logtalk, provided that your favorite Prolog compiler is supported.
+Logtalk installation and working environment.
 
 
-7. DOCUMENTATION
+7. QUICK START
+
+The file "QUICK_START.txt" provides quick instructions for those of you in 
+a hurry to run Logtalk, provided that your favorite Prolog compiler is 
+supported.
+
+
+8. DOCUMENTATION
 
 The reference and user manuals and the tutorial are provided in XHTML format 
 and can be found in the "manuals" directory.
 
-The file RELEASE_NOTES contains descriptions of all Logtalk updates since the 
+The file "RELEASE_NOTES.txt" contains descriptions of all Logtalk updates 
-first public version. Read it carefully if you have been using a previous 
+since the first public version. Read it carefully if you have been using a 
-Logtalk version.
+previous Logtalk version.
 
 
-8. UPGRADING
+9. UPGRADING
 
 If you are upgrading from a previous Logtalk version, please check the file 
-UPGRADING for instructions on how to upgrade your programs or your custom 
+"UPGRADING.txt" for instructions on how to upgrade your programs or your 
-configuration files to run under this new version.
+custom configuration files to run under this new version.
 
 
-9. CITATIONS
+10. CITATIONS
 
 If you want to cite Logtalk in your publications, please consult the file 
-BIBLIOGRAPHY for bibliographic references in BibTeX format.
+"BIBLIOGRAPHY.bib" for bibliographic references in BibTeX format.
 
 
-10. CONTRIBUTIONS
+11. CONTRIBUTIONS
 
 Contributions, constructive criticisms, code, and suggestions are always 
 welcome. If you want to contribute to this project, drop me a line to the 

Logtalk/RELEASE_NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -10,6 +10,173 @@ RELEASE NOTES
 =============
 
 
+2.28.2 - November 6, 2006
+
+	Corrected a compiler bug where unknown entities will not be report when 
+	compiling a source file whenever an entity with the same name but of a
+	different type is already known.
+
+	Added a XPCE hook file ("configs/xpcehook.pl") supporting Logtalk message 
+	sending goals as XPCE call-back goals. The XPCE library is now loaded by 
+	default by the SWI-Prolog integration scripts.
+
+	Added support for generating single PDF files of the User and Reference 
+	Manuals. Removed the PDF versions of the individual manual XHTML pages.
+
+	The ECLiPSe config files now require release 5.10#26 or a later version.
+
+	Added support for listing Logtalk entity names (objects, categories, and 
+	protocols) in the SubEthaEdit symbols menu.
+
+	Added a Vim dictionary file for Logtalk keyword completion and support 
+	for automatic indentation.
+
+	Added basic support for the MacOS X Smultron text editor. Added basic 
+	support for the Notepad++, SuperEdi, and ConTEXT Windows text editors.
+
+
+2.28.1 - October 10, 2006
+
+	Added support for using XML entities using the notation "{entity name}" 
+	in info/1 documenting directives for the "author", "copyright", and 
+	"license" keywords. The XML entities are defined on a "custom.ent" file.
+
+	Updated Logtalk bibliographic references (in file "BIBLIOGRAPHY.bib").
+
+	Added a "lgt_uninstall.sh" shell script for uninstalling Logtalk on POSIX 
+	operating systems.
+
+	Improved RPM install-time messages on the defined Logtalk environment 
+	variables.
+
+	Updated the ECLiPSe integration scripts and config files to work with 
+	and require version 5.10 (the first open source version of ECLiPSe).
+
+	Corrected a typo on the "logtalk.dtd" file that prevents validation of 
+	XML documenting files that use a local reference to the DTD.
+
+
+2.28.0 - September 28, 2006
+
+	Updated the Logtalk license to the final version of the "The Artistic 
+	License 2.0" (see http://www.perlfoundation.org/legal/ for details).
+
+	Added experimental support for multi-threading programming on selected 
+	Prolog compilers. Added a new object directive, threaded/0, a new 
+	predicate directive, atomic/1, and four new built-in predicates, 
+	threaded_call/1-2 and threaded_exit/1-2. Added a new set of examples, 
+	"threads". Thanks to Paulo Nunes for helping developing and testing 
+	these new features.
+
+	Expanded support for meta-predicates by allowing the declaration of meta-
+	arguments as closures instead of goals.
+
+	Added the generalized call/N predicate as a built-in method. This built-in 
+	method must be used in the implementation of meta-predicates which work 
+	with closures instead of goals.
+
+	The metapredicate/1 directive should be considered deprecated. Use the 
+	meta_predicate/1 directive instead.
+
+	Updated the Logtalk compiler to generate an error whenever a non-variable 
+	meta-argument is found in a clause head of a user-defined meta-predicate.
+
+	Improved compilation of meta-predicate meta-arguments. Corrected a bug 
+	in the compilation of user meta-predicates that allowed illegal calls 
+	to non-public predicates on the caller object to be made from the object 
+	defining the meta-predicates. Thanks to Rémy Haemmerlé and François 
+	Fages for reporting the problem.
+
+	Improved performance for non-cached messages, notably when running with 
+	YAP, GNU Prolog, and SWI-Prolog on all operating systems and with SICStus 
+	Prolog 4.0 on POSIX operating systems.
+
+	Updated the Logtalk compiler to generate an error whenever a predicate 
+	directive appears in a source file after predicate clauses that call the 
+	predicate specified in the directive.
+
+	Added support for "copyright" and "license" keys to the info/1 entity 
+	documenting directive.
+
+	Improved compiler error messages to also report source file line number 
+	for selected Prolog compilers.
+
+	Added PDF versions of all the manual XHTML pages. Added links to all the 
+	manual XHTML pages to the corresponding PDF versions.
+
+	Corrected a bug (introduced in version 2.27.0) in the built-in predicates 
+	abolish_object/1, abolish_protocol/1, and abolish_category/1 that resulted
+	in some clauses not being retracted when an object is abolished (thanks to 
+	Neng-Fa Zhou for the bug report).
+
+	Corrected a bug (introduced in version 2.27.1) in the processing of the 
+	term_expansion/2 predicate.
+
+	Corrected a bug in the compilation of redefined built-in predicates with 
+	no clauses.
+
+	Added an experimental config file for CxProlog 0.93.1.
+
+	Updated the SWI-Prolog config and hook files in order to support the 
+	edit/1 and make/0 development predicates.
+
+	Changed the Logtalk - SWI-Prolog integration scripts to load the hook 
+	file "swihook.pl" after the other files in order to avoid some possible 
+	errors at startup.
+
+	Updated the config file for the forthcoming SICStus Prolog 4.0 version 
+	to work in the current beta version. Modified the "make_sicstuslgt.*" 
+	shell scripts to work with both SICStus Prolog 3.12 and 4.0 versions.
+
+	Updated the config file for YAP to workaround a problem on the Windows 
+	version where testing for directory existence fails if the path ends with 
+	a slash (or a double backslash); this problem prevents the use of library 
+	notation to load source files (problem already fixed in the current YAP 
+	CVS version).
+
+	Updated the config file for B-Prolog to match (and require) the new 6.9 
+	version; added integration shell scripts (for both Windows and POSIX 
+	systems).
+
+	Updated the config files and the integration scripts for ECLiPSe in order 
+	to workaround bugs on the predicates abolish/1 and canonical_path_name/2.
+	Modified the "make_eclipselgt.js" script to work with both ECLiPSe 5.8 
+	and 5.9 versions.
+
+	Dropped support for versions of XSB older than 3.0. Added support for 
+	smart compilation of source files to the XSB config file.
+
+	Updated the config file for IF/Prolog 5.1 by adding a missing definition 
+	for predicate retractall/1 and avoiding some harmless singleton warnings.
+
+	Add a ".txt" extension to all "NOTES" and "SCRIPT" files.
+
+	Extended "dcgs", "parametric", and "metainterpreters" examples.
+
+	Added Inno Setup GUI Windows installer script.
+
+	Update all the JScript scripts to check if a compatible version of WSH 
+	is installed and to workaround some problems with spaces in file paths.
+
+	Updated the "lgt_install.js" JScript script to copy the scripts/*.bat and 
+	the xml/*.bat batch scripts to the system's Windows directory instead of 
+	modifying the PATH environment variable.
+
+	Updated the "cplgtdirs.*" shell scripts to make a backup copy of any 
+	previous LOGTALKUSER directory.
+
+	Added post-install scripts to the LINUX RPM "logtalk.spec" file for 
+	setting the environment variable LOGTALKHOME for all users, defining 
+	a default value for the environment variable LOGTALKUSER, and running 
+	the Prolog integration scripts.
+
+	Split the installation and customization instructions in two files, 
+	"INSTALL.txt" and "CUSTOMIZE.txt".
+
+	Added shell scripts for converting the manual XHTML pages into PDF files 
+	using CSSToXSLFO.
+
+
 2.27.1 - March 27, 2006
 
 	Allow calls to the built-in method parameter/2 with the first argument 

Logtalk/UPGRADING.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -19,6 +19,10 @@ translation examples.
 Upgrading from a previous Logtalk 2.x versions
 ==============================================
 
+Changes in the Logtalk compiler between releases may render Prolog config 
+files from older versions incompatible with new ones. You may need to update 
+your local Logtalk user files by running e.g. the "cplgtdirs" shell script.
+
 If your Logtalk programs depend on some of the example files, it is
 advisable that you check your code against the new version before 
 throwing away the older release.
@@ -128,3 +132,13 @@ declaration linking clauses, resulting in small performance improvements and
 in space savings for the Prolog code generated when compiling Logtalk entities.
 Recompilation of all objects, protocols, and categories is necessary in order 
 to take advantage of this optimizations.
+
+Logtalk 2.28.0 changes representation of meta-predicates, implying the 
+recompilation of all objects, protocols, and categories that define them.
+In addition, in order to close some security holes where meta-predicates 
+could be used to bypass predicate scope declarations, meta-predicates that 
+use closures must be re-implemented to use the new call/N Logtalk built-in 
+predicate. The directive metapredicate/1 is now deprecated, the directive 
+meta_predicate/1 should be used instead. There are also changes to the 
+config files that render the Logtalk runtime imcompatible with the config 
+files of previous versions.

Logtalk/contributions/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -27,7 +27,9 @@ code or from known Prolog text books and are copyrighted by the respective
 authors.
 
 These are programming examples, meaning that you should study the source 
-files to fully understand them.
+files to fully understand them. However, note that some examples purpose 
+is to illustrate general principles rather than being adequate, efficient 
+solutions for deployment code.
 
 All examples are formatted using four spaces tabs.
 
@@ -109,10 +111,11 @@ lpa
 	examples adopted from the LPA Prolog++ system
 
 metapredicates
-	example of using metapredicates in Logtalk objects
+	example of using meta-predicates in Logtalk objects
 
 metainterpreters
-	some examples of simple metainterpreters
+	some examples of simple meta-interpreters defined as categories which 
+	may be imported by "database" objects
 
 mi
 	multi-inheritance examples
@@ -177,5 +180,8 @@ symdiff
 	example of using parametric objects to implement symbolic expression 
 	differentiation and simplification
 
+threads
+	several simple examples of multi-threading programming
+
 viewpoints
 	example on how to implement property and value sharing with prototypes

Logtalk/examples/aliases/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/aliases/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/assignvars/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/assignvars/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/benchmarks/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/benchmarks/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/birds/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/birds/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/bricks/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/bricks/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/classvars/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/classvars/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/dcgs/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/dcgs/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -20,6 +20,13 @@ Result = -9
 yes
 
 
+% Recognize MAC addresses:
+
+| ?- macaddr::valid("00:1e:4a:ef:72:8b").
+
+yes
+
+
 % solve a cellphone keypad encoded enigma:
 
 | ?- enigma::solve("4 96853 5683 86 4283 346637 9484 968 8664448", Message).

Logtalk/examples/dcgs/macaddr.lgt

@@ -0,0 +1,17 @@
+
+:- object(macaddr).
+
+	:- public(valid/1).
+
+	valid(Address) :-
+		phrase(mac, Address).
+
+	mac --> digits, ":", digits, ":", digits, ":", digits, ":", digits, ":", digits.
+
+	digits --> digit, digit.
+
+	digit --> [C], {0'0 =< C, C =< 0'9}.
+	digit --> [C], {0'a =< C, C =< 0'f}.
+	digit --> [C], {0'A =< C, C =< 0'F}.
+
+:- end_object.

Logtalk/examples/diamonds/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/diamonds/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/dynpred/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/dynpred/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/encodings/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/encodings/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/engines/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/engines/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/errors/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/errors/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/expansion/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/expansion/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/hello_world/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/hello_world/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/hooks/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/hooks/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/inheritance/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/inheritance/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/instmethods/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/instmethods/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lo/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lo/planner/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lo/planner/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lo/travellers/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lo/travellers/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/logic/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/logic/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lpa/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lpa/faults/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lpa/faults/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lpa/timetables/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/lpa/timetables/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/metainterpreters/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -9,7 +9,7 @@ Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 To load this example and for sample queries, please see the SCRIPT file.
 
 This example contains simple meta-interpreters for pure Prolog encapsulated 
-in Logtalk objects:
+in Logtalk categories:
 
 	solver
 		simple meta-interpreter for pure Prolog
@@ -21,3 +21,6 @@ in Logtalk objects:
 	tracer
 		simple meta-interpreter for pure Prolog that traces proof 
 		construction
+
+To use a meta-interpreter with an object, simply import the corresponding 
+category.

Logtalk/examples/metainterpreters/SCRIPT

@@ -1,113 +0,0 @@
-=================================================================
-Logtalk - Object oriented extension to Prolog
-Release 2.27.1
-
-Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
-=================================================================
-
-
-% start by loading the example:
-
-| ?- logtalk_load(metainterpreters(loader)).
-...
-
-
-% solver - a simple meta-interpreter for pure Prolog:
-
-| ?- solver::assertz(member_of(H, [H| _])).
-
-H = _G178 
-yes
-
-| ?- solver::assertz((member_of(H, [_| T]) :- member_of(H, T))).
-
-H = _G181
-T = _G179 
-yes
-
-| ?- solver::solve(member_of(2, [1,2,3])).
-
-yes
-
-| ?- solver::solve(member_of(X, [1,2,3])).
-
-X = 1 ;
-X = 2 ;
-X = 3
-yes
-
-
-% proof_tree - a simple meta-interpreter for pure Prolog that 
-% construct a proof tree:
-
-| ?- proof_tree::assertz(member_of(H, [H| _])).
-
-H = _G178 
-yes
-
-| ?- proof_tree::assertz((member_of(H, [_| T]) :- member_of(H, T))).
-
-H = _G181
-T = _G179 
-yes
-
-| ?- proof_tree::solve(member_of(2, [1,2,3]), Tree).
-
-Tree = member_of(2, [1, 2, 3]):- (member_of(2, [2, 3]):-true) 
-yes
-
-
-% tracer - a simple meta-interpreter for tracing goal proofs 
-% using pure Prolog:
-
-
-| ?- tracer::assertz(member_of(H, [H| _])).
-
-H = _G178 
-yes
-
-| ?- tracer::assertz((member_of(H, [_| T]) :- member_of(H, T))).
-
-H = _G181
-T = _G179 
-yes
-
-| ?- tracer::trace(member_of(3, [1,2,3])).
-
-1 call: member_of(3, [1, 2, 3])
-2 call: member_of(3, [2, 3])
-3 call: member_of(3, [3])
-3 exit: member_of(3, [3])
-2 exit: member_of(3, [2, 3])
-1 exit: member_of(3, [1, 2, 3])
-yes
-
-| ?- tracer::trace(member_of(X, [1,2,3])).
-
-1 call: member_of(_G187, [1, 2, 3])
-1 exit: member_of(1, [1, 2, 3])
-
-X = 1 ;
-1 redo: member_of(1, [1, 2, 3])
-2 call: member_of(_G187, [2, 3])
-2 exit: member_of(2, [2, 3])
-1 exit: member_of(2, [1, 2, 3])
-
-X = 2 ;
-1 redo: member_of(2, [1, 2, 3])
-2 redo: member_of(2, [2, 3])
-3 call: member_of(_G187, [3])
-3 exit: member_of(3, [3])
-2 exit: member_of(3, [2, 3])
-1 exit: member_of(3, [1, 2, 3])
-
-X = 3 ;
-1 redo: member_of(3, [1, 2, 3])
-2 redo: member_of(3, [2, 3])
-3 redo: member_of(3, [3])
-4 call: member_of(_G187, [])
-4 fail: member_of(_G187, [])
-3 fail: member_of(_G187, [3])
-2 fail: member_of(_G187, [2, 3])
-1 fail: member_of(_G187, [1, 2, 3])
-no

Logtalk/examples/metainterpreters/SCRIPT.txt

@@ -0,0 +1,100 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.28.2
+
+Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+% start by loading the example:
+
+| ?- logtalk_load(metainterpreters(loader)).
+...
+
+
+% direct call of p/1:
+
+| ?- ?- database::p(X).
+
+X = 1 ;
+X = 2 
+yes
+
+
+% solver - a simple meta-interpreter for pure Prolog:
+
+| ?- database::solve(p(X)).
+
+X = 1 ;
+X = 2 
+yes
+
+| ?- database::proof_tree(p(X), Tree).
+
+X = 1
+Tree = p(1):- (q(1, a):- (s(1):-true), (t(1, a):-true)), (r(a):-true) ;
+X = 2
+Tree = p(2):- (q(2, b):- (s(2):-true), (t(2, b):-true)), (r(b):-true) 
+yes
+
+
+% tracer - a simple meta-interpreter for tracing goal proofs using pure Prolog:
+
+| ?- database::trace(p(X)).
+1 call: p(_G180)
+2 call: q(_G180, _G316)
+3 call: s(_G180)
+3 exit: s(1)
+3 call: t(1, _G316)
+3 exit: t(1, a)
+2 exit: q(1, a)
+2 call: r(a)
+2 exit: r(a)
+1 exit: p(1)
+
+X = 1 ;
+1 redo: p(1)
+2 redo: r(a)
+2 fail: r(a)
+2 redo: q(1, a)
+3 redo: t(1, a)
+3 fail: t(1, _G316)
+3 redo: s(1)
+3 exit: s(2)
+3 call: t(2, _G316)
+3 exit: t(2, b)
+2 exit: q(2, b)
+2 call: r(b)
+2 exit: r(b)
+1 exit: p(2)
+
+X = 2 ;
+1 redo: p(2)
+2 redo: r(b)
+2 fail: r(b)
+2 redo: q(2, b)
+3 redo: t(2, b)
+3 fail: t(2, _G316)
+3 redo: s(2)
+3 exit: s(3)
+3 call: t(3, _G316)
+3 fail: t(3, _G316)
+3 redo: s(3)
+3 fail: s(_G180)
+2 fail: q(_G180, _G316)
+1 fail: p(_G180)
+
+no
+
+
+% another example: expert system rules:
+
+| rules::prove(weather(Wheather)).
+
+Wheather = raining 
+yes
+
+| ?- rules::prove(goto(Where)).
+
+Where = cinema 
+yes

Logtalk/examples/metainterpreters/database.lgt

@@ -0,0 +1,23 @@
+
+:- object(database,
+	imports(solver, proof_tree, tracer)).
+
+	:- public(p/1).
+	:- private(q/2, r/1, s/1, t/2).
+	:- dynamic(p/1, q/2, r/1, s/1, t/2).
+
+	p(X) :- q(X, Y), r(Y).
+
+	q(X, Y) :- s(X), t(X, Y).
+
+	r(a).
+	r(b).
+
+	s(1).
+	s(2).
+	s(3).
+
+	t(1, a).
+	t(2, b).
+
+:- end_object.

Logtalk/examples/metainterpreters/rules.lgt

@@ -0,0 +1,48 @@
+
+:- category(engine).
+
+	:- public(prove/1).
+
+	:- public(if/1).
+	:- dynamic(if/1).
+
+	:- op(200,  fx, if).
+	:- op(100, xfx, then).
+
+	prove(true) :-
+		!.
+
+	prove([]) :-
+		!.
+	prove([Cond| Conds]) :-
+		!,
+		prove(Cond),
+		prove(Conds).
+
+	prove(Fact) :-
+		::clause(Fact, true).
+	prove(Conclusion) :-
+		::clause(if Conds then Conclusion, true),
+		prove(Conds).
+
+:- end_category.
+
+
+:- object(rules,
+	imports(engine)).
+
+	:- public([weather/1, weekday/1, time/1, goto/1]).
+	:- dynamic([weather/1, weekday/1, time/1, goto/1]).
+
+	:- op(200,  fx, if).
+	:- op(100, xfx, then).
+
+	if [weather(sunny), weekday(weekend), time(day)] then goto(beach).
+	if [weather(raining), weekday(weekend), time(night)] then goto(cinema).
+	if [weekday(workday), time(day)] then goto(work).
+
+	weather(raining).
+	weekday(weekend).
+	time(night).
+
+:- end_object.

Logtalk/examples/metapredicates/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -8,7 +8,7 @@ Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 
 To load this example and for sample queries, please see the SCRIPT file.
 
-This example shows the use of metapredicates in Logtalk. Metapredicates are 
+This example shows the use of meta-predicates in Logtalk. Meta-predicates are 
 predicates whose head contains arguments that will be called as goals in the 
 body of the predicate definition.
 
@@ -20,5 +20,5 @@ This example defines two objects:
 		of the elements being sorted
 	
 	tracer
-		this object implements a metapredicate that is used by sort(_) to 
+		this object implements a meta-predicate that is used by sort(_) to 
 		trace the sorting algorithm steps

Logtalk/examples/metapredicates/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/mi/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/mi/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/miscellaneous/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/miscellaneous/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/modules/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/modules/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/msglog/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/msglog/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/operators/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/operators/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/parametric/NOTES

@@ -1,12 +0,0 @@
-=================================================================
-Logtalk - Object oriented extension to Prolog
-Release 2.27.1
-
-Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
-=================================================================
-
-
-To load this example and for sample queries, please see the SCRIPT file.
-
-This folder contains three examples of parametric objects, the first two 
-dealing with time and date values and the third one representing rectangles.

Logtalk/examples/parametric/NOTES.txt

@@ -0,0 +1,12 @@
+=================================================================
+Logtalk - Object oriented extension to Prolog
+Release 2.28.2
+
+Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
+=================================================================
+
+
+To load this example and for sample queries, please see the SCRIPT file.
+
+This folder contains some examples of parametric objects, dealing with 
+lists, time and date values, and rectangles.

Logtalk/examples/parametric/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -12,6 +12,30 @@ Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 ...
 
 
+% some queries using the list parametric object:
+
+| ?- [1, 2, 3]::member(X).
+
+X = 1 ;
+X = 2 ;
+X = 3 ;
+no
+
+| ?- [1, 2, 3]::last(X).
+
+X = 3
+yes
+
+| ?- [1, 2, 3]::nextto(2, Y).
+
+Y = 3
+yes
+
+| ?- []::member(X)
+
+no
+
+
 % some queries using the time and date parametric objects:
 
 | ?- date(Year, Month, Day)::today.
@@ -19,14 +43,12 @@ Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 Year = 2000
 Month = 8
 Day = 15 
-
+yes
-Yes
 
 
 | ?- date(Year, _, _)::(today, \+ leap_year). 
 
 Year = 2002
-
 yes
 
 
@@ -35,8 +57,7 @@ yes
 Hours = 13
 Mins = 52
 Secs = 42 
-
+yes
-Yes
 
 
 | ?- R = rectangle(W, H, X, Y), R::init, R::move(3, 4, NR), NR::position(X2, Y2).
@@ -49,5 +70,4 @@ Y = 0
 NR = rectangle(2, 1, 3, 4)
 X2 = 3
 Y2 = 4 
-
+yes
-Yes

Logtalk/examples/points/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/points/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/polygons/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/polygons/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/profiling/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/profiling/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/proxies/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/proxies/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/puzzles/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/puzzles/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/reflection/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/reflection/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/relations/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/relations/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/roots/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/roots/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/searching/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/searching/SCRIPT.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================

Logtalk/examples/shapes/NOTES.txt

@@ -1,6 +1,6 @@
 =================================================================
 Logtalk - Object oriented extension to Prolog
-Release 2.27.1
+Release 2.28.2
 
 Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 =================================================================
@@ -9,6 +9,9 @@ Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
 This directory contains two versions, one prototype-based and the 
 other one class-based, of a very simple geometric shapes hierarchy.
 
+The aim of this example is to compare the pros and cons of using 
+either prototypes or classes for defining object hierarchies.
+
 ph
 	prototype-based version
 

Logtalk/examples/shapes/ch/NOTES

@@ -1,14 +0,0 @@
-=================================================================
-Logtalk - Object oriented extension to Prolog
-Release 2.27.1
-
-Copyright (c) 1998-2006 Paulo Moura.  All Rights Reserved.
-=================================================================
-
-
-To load this example and for sample queries, please see the SCRIPT file.
-
-You will need to load the following files in the library directory: 
-events_loader, types_loader, and hierarchies_loader. Alternatively, 
-you may load the library all_loader file to load all library entities.
-