org workflows er diagram v2

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#leading: 1.5
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[User|id: INT; username: STR; password: STR; first_name: STR; middle_name: STR; last_name: STR|ckeys: (id), (username)]
[Org|id: INT;name: STR;description: STR|ckeys: (id), (name)]
[Membership|org_id: INT; user_id: INT|ckeys: (org_id, user_id)]
[Workflow|id: INT;org_id: INT;name: STR|ckeys: (id), (name, org_id)]
[Task|id: INT;workflow_id: INT;name: STR;status: STR|ckeys: (id)]
[TaskAssignment|task_id: INT;user_id: INT|ckeys: (task_id, user_id)]
[Prereq|task_id: INT;prereq_id: INT|ckeys: (task_id, prereq_id)]
[Tag|id: INT; workflow_id: INT; name: STR|ckeys: (id)]
[TaskTag|task_id: INT; tag_id: INT|ckeys: (task_id, tag_id)]

[User]<-[TaskAssignment]
[Task]<-[TaskAssignment]
[Org]<-[Membership]
[User]<-[Membership]
[Org]<-[Workflow]
[Workflow]<-[Task]
[Task]<-[Prereq]
[Task]<-[Prereq]
[Workflow]<-[Tag]
[Task]<-[TaskTag]
[Tag]<-[TaskTag]