Ruby's License will change to BSDL + Ruby's dual license

== Background

Ruby's License, which is used as the license of Ruby and other related software,
says it is dual license: GPLv2 or Ruby's in a narrow sense.

But it has following problems:
* it is not compatible with GPLv3
* a modest person can't port Ruby's code into BSDL
* a greed person can port Ruby's code into public domain
  (use quotation clause)

So copyleft spirit of Ruby's License is the barrier to BSDL,
but can't effect to modified codes.

== Change

current: GPLv2 + Ruby's
new: BSDL + Ruby's

== Merit

* you can use Ruby with GPLv3 software
* you can port Ruby's code into BSDL code	

== Demerit

nothing: because people can everything with change the name or quotation clause.

== Discussion

It was discussed in [ruby-dev:39167], [ruby-core:25272] and so on.
Initial decision was made on RubyKaigi 2010 by Matz.
http://redmine.ruby-lang.org/wiki/ruby/DevelopersMeeting20100827

== Public Comment

Matz said we'll wait 2 weeks for the comment.
So please comment to us if you have any comment.

-- 
NARUSE, Yui  <naruse / airemix.jp>