The theory of public domain is not limited to the fixation of protecting border of copyright protection and protecting contents to be confirmed concrete cases,but to establish the whole theoretical framework of copyright law on the base of it.

• 公共领域理论的关键并不限于确定著作权保护的边界以及在具体的案件中用于确定保护与不保护的内容,而是以此为基石建立整个著作权法理论框架。