关于许可：GPL v2和GPL v3许可之间有什么区别？

简单来说，是什么原因，以及GPL v2和GPL v3开源许可证之间的区别是什么？ 对法律术语和进一步描述的解释和参考将是可理解的。

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链接到另一个答案中的页面是一个很好的来源，但阅读起来很多。以下是一些主要差异的简短列表：

• 国际化：他们使用新的术语，而不是使用与美国法律概念相关的语言

• 专利：它们专门解决专利问题(包括另一个答案中提到的Microsoft / Novell问题)

• " Tivo-ization"：它们解决了消费产品中的限制(例如Tivo的限制)，这些限制通过硬件消除了修改软件的能力

• DRM：他们致力于数字版权管理(他们称为数字限制管理)

• 兼容性：它们解决了与其他一些开源许可证的兼容性

• 终止：他们专门解决如果违反了许可证并解决违规情况会发生什么

我同意有关咨询律师的意见(尽管该律师知道软件许可问题)。在做这些事情(以及更多)时，它们的长度超过了GPL的两倍。尽管GPLv3是一个复杂的法律文档，但其设计目的是让软件开发人员阅读和合理理解。在http://copyleft.org/guide/上也有一个了解它的指南以及对从v2到v3的更改的深入讨论。

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该链接还突出显示了GPLv2和GPLv3之间的区别

内容：

GPLv3 of June 29, 2007 contains the basic intent of GPLv2 and is an Open Source license with a strict copyleft (→ What types of licenses are there for Open Source software, and how do they differ?) However, the language of the license text was strongly amended and is much more comprehensive in response to technical and legal changes and international license exchange.

The new license version contains a series of clauses that address questions that were not or were only insufficiently covered in version 2 of the GPL. The most important new regulations are as follows:

a) GPLv3 contains compatibility regulations that make it easier than before to combine GPL code with code that was published under different licenses (→ What is license compatibility?). This concerns in particular code under Apache license v. 2.0.

b) Regulations concerning digital rights management were inserted to keep GPL software from being changed at will because users appealed to the legal regulations to be protected by technical protective measures (such as the DMCA or copyright directive). The effectiveness in practice of the contractual regulations in the GPL has yet to be seen.

c) The GPLv3 contains an explicit patent license, according to which people who license a program under the GPL license both copyrights as well as patents to the extent that this is necessary to use the code licensed by them. A comprehensive patent license is not thereby granted. Furthermore, the new patent clause attempts to protect the user from the consequences of agreements between patent owners and licensees of the GPL that only benefit some of the licensees (corresponding to the Microsoft/Novell deal). The licensees are required to ensure that every user enjoys such advantages (patent license or release from claims), or that no one can profit from them.

d) In contrast to the GPLv2, the GPLv3 clearly states that there is no requirement to disclose the source code in an ASP use of GPL programs as long as a copy of the software is not sent to the client. If the copyleft effect is to be extended to ASP use (→ When does independently developed software have to be licensed under the GPL?), the Affero General Public License, Version 3 (AGPL) must be applied that only differs from the GPLv3 in this regard.

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该页面突出显示了差异，但仍然有很多通读内容。

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用(不是完全)愤世嫉俗的话来说，获得v3许可证的原因是微软与Novell达成的专利协议。

实际上，在处理法律问题时，您应始终咨询律师。

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