Stakeholders
1. site owner : who provides the host and icp license
1.1 charged by isp
1.2 warned by god
1.3 offline the system

2. host root : who setup the application server and deploy system
2.1 first time deploy the system
2.2 update the system
2.3 emerge existed data from some system
2.4 system backup

3. system administrator : who initialized and run the forum/blog/wiki etc.
3.1 create initial structure
3.2 manage managers
3.3 create and run over-all rules

4. board manager : who manages one section of the community
4.1 manage topic
4.2 manage user behavior inside the board
4.3 kill self
4.4 grant and invoke vice manager

5. board vice manager : who assits board manager to keep order of board.
5.1 manage user behavior inside the board if granted
5.2 manage topic if granted

6. poster : who is the normal user.
5.1 fire a new thread
5.2 response to other
5.3 manage thread owned
5.4 manage post owned
5.5 register
5.6 kill self
5.7 manage profile
5.8 manage personal collection
5.9 search something

7. guest : who is wondering on the network.
7.1 brows site structure if granted
7.2 read topic if granted
7.3 comment if granted

8. government force : who is the god.
8.1 monitor the site
8.2 warning site owner for bad behavior
8.3 drop the connection and/or server