The updated ER diagram:
Class diagram:
Use Case diagram:
TIMING:
1, users can recommend students to get the information by searching the community or home, then decide whether to subscribe to the information society under the Societies.
2, students can send tweets through the community to learn about community activities and decide whether to participate in
3, students can respond to comments in the article
4, the president apply to the activities of the audit by the administrator, the administrator time to view the site whether the conflict, and records; to be approved, the president needs to send tweets to inform you that this event has
5, the president can remove members, add members, modify member jobs
