User
    ident Text
    password Text Maybe
    UniqueUser ident
    deriving Typeable
Email
    email Text
    userId UserId Maybe
    verkey Text Maybe
    UniqueEmail email    
Comment json -- Adding "json" causes ToJSON and FromJSON instances to be derived.
    message Text
    userId UserId Maybe
    deriving Eq
    deriving Show
--
-- above from Template, needs editing
--
Term json
    name        Text
    start       UTCTime
    end         UTCTime    
    holidays    [UTCTime]
    UniqueTerm name
    deriving Eq
School json
    name Text 
    UniqueSchool name
    deriving Eq    
Degree json
    name Text
    schoolId SchoolId
    UniqueDegree name schoolId
    deriving Eq    
DegreeCourse json
    degreeId DegreeId
    courseId CourseId
    UniqueDegreeCourse degreeId courseId
Course json
    name         Text
    owner        UserId    
    schoolId     SchoolId
    termId       TermId Maybe
    capacity     Int Maybe    
    created      UTCTime
    changed      UTCTime
    registerFrom UTCTime
    registerTo   UTCTime
Lecturer 
    userId       UserId
    courseId     CourseId
    UniqueLecturer userId courseId 
CourseParticipant
    userId       UserId
    courseId     CourseId
    registration UTCTime
    UniqueCourseParticipant userId courseId 
Sheet
    courseId        CourseId
    name            Text
    sheetType       SheetType 
    maxPoints       Double Maybe
    requiredPoints  Double Maybe
    exerciseId      FileId Maybe
    hintId          FileId Maybe
    solutionId      FileId Maybe
    markingId       FileId Maybe
    markingText     Text
    activeFrom      UTCTime
    activeTo        UTCTime
    hintFrom        UTCTime Maybe
    solutionFrom    UTCTime Maybe
    created         UTCTime
    changed         UTCTime
    createdBy       UserId
    changedBy       UserId    
File        
    title           Text
    content         ByteString
Submission
    sheetId         SheetId
    fileId          FileId
    updateId        FileId  Maybe
    ratingBy        UserId  Maybe
    ratingPoints    Double  Maybe
    ratingComment   Text    Maybe 
    rated           UTCTime Maybe   
    created         UTCTime
    changed         UTCTime
    createdBy       UserId
    changedBy       UserId
SubmissionUser
    userId          UserId
    submissionId    SubmissionId
    UniqueSubmissionUser userId submissionId
SubmissionGroup
    courseId        CourseId
    name            Text
    created         UTCTime
    changed         UTCTime
    createdBy       UserId
    changedBy       UserId
SubmissionGroupUser
    submissionGroupId SubmissionGroupId
    userId            UserId   
    UniqueSubmissionGroupUser submissionGroupId userId
Tutorial json
    name        Text
    tutor       UserId    
TutorialUser
    userId      UserId
    tutorialId  TutorialId
    UniqueTutorialUser userId tutorialId
Booking
    termId      TermId
    begin       UTCTime
    end         UTCTime
    weekly      Bool
    exceptions  [UTCTime]
    created     UTCTime
    changed     UTCTime
    createdBy   UserId
    changedBy   UserId
Room
    name        Text
    capacity    Int Maybe
    building    Text
RoomCourse
    courseId    CourseId
    tutorialId  TutorialId Maybe
    examId      ExamId Maybe
    roomId      RoomId
    bookingId   BookingId
    UniqueRoomCourse courseId roomId bookingId
Exam
    courseId            CourseId
    name                Text
    description         Text
    begin               UTCTime
    end                 UTCTime
    registrationBegin   UTCTime
    registrationEnd     UTCTime
    deregistrationEnd   UTCTime
    ratingVisible       Bool
    statisticsVisible   Bool
    created             UTCTime
    changed             UTCTime
    createdBy           UserId
    changedBy           UserId  
ExamUser
    userId              UserId
    examId              ExamId
    -- CONTINUE HERE: Inlcude rating in this table or seperatly?
    UniqueExamUser userId examId
 -- By default this file is used in Model.hs (which is imported by Foundation.hs)