[dennou-ruby:003310] Re: Dennou-Ruby 製品群のライセンス

[Youhei SASAKI <uwabami@xxxxxxxxxxxxxx>]

堀之内様: 佐々木です.

At Fri, 25 Mar 2011 17:32:45 +0900,
Takeshi Horinouchi <horinout@xxxxxxxxxxxxxxxxx> wrote:
> 解説ありがとうございます．だいぶ要点がわかってきました．
> GPLの感染力ってキーワードとしては良く聞くのですが，そういう
> ことなんですね．

まぁ, freeride しているのに「感染」と言うのは如何なものか, と個人的には思
いますが.

> ところで，
> >    「広義 Ruby's = 狭義 Ruby's + GPL-2+ のデュアルライセンス」
> >
> > を提案しました.
> >
> > # 面倒なら BSD 2 (or3)-clause だけ, にするのも手ではありますが.
>
> Ruby-FFTW3 に関して，後者の解はありえるのでしょうか？
> -- BSD 2 や BSD 3 というのは，GPL-2 と「互換」なのでＯＫということ？

はい. BSD 2(or3)-clause は GPL よりもだいぶ自由なライセンスなので, GPL 互
換です. GPL は, GPL より厳しいライセンスは互換としません(狭義 Ruby's は
GPL より厳しく解釈できる, という点でも GPL 非互換).  なので BSD 2(or
3)-clause だけ, というのはアリだと思います.

個人的には Ruby という言語のライブラリであるから大本の Ruby に合わせたら
良いのではないか, とは思いますが, BSD 2(or3-)clause ライセンスでなんら問
題があるわけではありません.

BSD-2, BSD-3 のテンプレートを添付します.
---
Youhei SASAKI <uwabami@xxxxxxxxxxxxxx>
              <uwabami@xxxxxxxxxxxxxxxxxx>
Department of Mathematics, Kyoto University
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