软件的确定授权版本，软件记录文件，许可证信息，以及其他相关信息都会参考该库。

It is the library from which the definitive authorized version of software, software documentation, licensing information, and other relevant information is referenced.

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Ruby 1.9.3改变了授权许可方式：之前版本的发布遵循了Ruby许可及GPLv2协议，后续的版本已改为2 - clause BSD许可。

Ruby 1.9.3 also changed its license: previous versions were released under the Ruby license and GPLv2, the later has now been changed to 2-clause BSD.

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