Discussion
FollowerSet
OutboxItem

Ticket
    number      Int           Maybe
    created     UTCTime
    title       Text
    source      Text
    description HTML
    status      Text
    discuss     DiscussionId
    followers   FollowerSetId
    accept      OutboxItemId

    -- UniqueTicket project number
    UniqueTicketDiscuss   discuss
    UniqueTicketFollowers followers
    UniqueTicketAccept    accept