【摘要】 相同方式共享(Share Alike,简称SA)是知识共享许可协议的四个授权要素之一。目前SA协议有两种:BY-SA和BY-NC-SA。SA的适用范围是演绎作品。SA与Copyleft有相似之处,但并不完全相同。SA协议属于强势协议,与其他作品重混时会吸收吞并其他协议。维基百科是BY-SA最著名的使用者,许多开放教育资源都采用了BY-NC-SA。更多还原

【Abstract】 Share Alike(SA) is one of the four elements of creative commons licenses. Now there are two SA licenses: BY-SA and BY-NC-SA. SA applies to derivative work. SA and Copyleft are similar, but not identical. SA licenses are strong licenses and absorb other licenses when remixing with other works. Wikipedia is BY-SA’s most famous users. Many open educational resources adopt BY-NC-SA.更多还原