多数开放源代码采用GPL协议，即应用开放源代码开发的衍生软件作品须承认软件作品作者的著作权，同时也要求作者必须允许任何人享有对其作品使用、复制、修改、衍生的自由权利。但是这种限定因为缺乏相关的适用原则和立法依据而不可避免地产生司法上的争执。文章从衍生软件作品的性质为出发点，认为其具有演绎作品和合作作品的双重属性，继而分析了相应的著作权归属及行使的问题，并具体阐述了司法实践中如何界定是否构成侵犯著作权的。

关键词：开源软件、衍生作品、著作权、GPL协议

Most of the open-source code adopts the GPL agreement, that is, derivative software works developed using open-source code must recognize the copyright of the software work author, and at the same time, the author must allow anyone to enjoy the freedom to use, copy, modify, and derive his work. However, this limitation inevitably leads to judicial disputes because of the lack of relevant applicable principles and legislative basis. Starting from the nature of derivative software works, the article believes that it has the dual attributes of deductive works and cooperative works, and then analyzes the corresponding copyright ownership and exercise, and specifically elaborates how to define whether it constitutes copyright infringement in judicial practice.

Keywords: Open-Source Software, Derivative Works, Copyright, GPL Agreement