The Sakai Community develops and distributes the open-source Sakai CLE, an enterprise-ready collaboration and courseware management platform that provides users with a suite of learning, portfolio, library and project tools. As an open source course management system, because of his open-source, as well as a powerful teaching function, sakai has received the great success at the global level, and its applications has also been in full carried out in domestic. In the sakai platform, the core is its permission management module, so if we want to have a comprehensive understanding of the operatio...