From: twinxor@... Date: 2007-04-27T17:10:10+09:00 Subject: Re: Programming Ruby: Improvements, copyright issues On Apr 26, 7:08 am, Dave Thomas wrote: > The license changed? Maybe I did that, but I can't remember doing it, > and I don't think anyone else _can_ change the license, as the > copyright was originally held by Addison Wesley and is now held by us. > > Can you show me where the license changed? > > Regards > > Dave The footnote on the pages in the Ubuntu "rubybook" package reads: "Copyright � 2000 Addison Wesley Longman, Inc. Released under the terms of the Open Publication License V1.0. This reference is available for download." While the version at RubyCentral (a newer version, I think) is more restrictive: "Copyright � 2001 by Addison Wesley Longman, Inc. This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/)). Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder. Distribution of the work or derivative of the work in any standard (paper) book form is prohibited unless prior permission is obtained from the copyright holder." In addition, the maintainer of the Debian package, Oliver M. Bolzer, mentions the change in the README.Debian file: "This package contains revision 0.2 of the online edition of the book. Newer revisions are available for download above, but the license has tightened to not allow "Substantive modification" and distribution in "any standard (paper) book form" is prohibited, making the work "non- free" in the context of the Debian Free Software Guideline. For this reason, newer revisions will not be packaged, but the substance of the book has not changed and this revision can still be considered useful."