Discussion

FollowerSet

Person

Ticket
    number      Int           Maybe
    created     UTCTime
    title       Text                -- HTML
    source      Text                -- Pandoc Markdown
    description Text                -- HTML
    assignee    PersonId      Maybe
    status      Text
    closed      UTCTime
    closer      PersonId      Maybe

LocalTicket
    ticket    TicketId
    discuss   DiscussionId
    followers FollowerSetId

    UniqueLocalTicket           ticket
    UniqueLocalTicketDiscussion discuss
    UniqueLocalTicketFollowers  followers

LocalTicketDependency
    parent    TicketId
    parentNew LocalTicketId
    created   UTCTime