#input to yuml.me

[User]^[Admin],[User]^[Student]
[Student]<1-*>[Rating]
[Rateable]<1..1-0..*>[Rating]
[Rateable]^[Class], [Rateable]^[Book], [Rateable]^[Paper], [Rateable]^[Place], [Rateable]^[Game]
[Place]^[PlaceEat], [Place]^[PlaceStudy], [Place]^[PlaceFun], [Place]^[Internship]
[Rating]<1-1>[Comment]
[Student]<1-*>[Grade]
[Course]<1-*>[Grade]
[Person]<1-Instructor 1>[Course]
[Person]<1-Author 1>[Paper]
[Person]<1-Author 1>[Book]
