Person
RemoteObject
RemoteActivity

Discussion

FollowerSet

Outbox

OutboxItem
    outbox    OutboxId
    activity  PersistJSONObject
    published UTCTime

Ticket
    number      Int           Maybe
    created     UTCTime
    title       Text                -- HTML
    source      Text                -- Pandoc Markdown
    description Text                -- HTML
    assignee    PersonId      Maybe
    status      TicketStatus
    discuss     DiscussionId
    followers   FollowerSetId
    accept      OutboxItemId

    UniqueTicketDiscuss   discuss
    UniqueTicketFollowers followers
    UniqueTicketAccept    accept

RemoteTicketDependency
    ident  RemoteObjectId
    child  LocalTicketId
    childNew  TicketId
    accept RemoteActivityId

    UniqueRemoteTicketDependency ident
    UniqueRemoteTicketDependencyAccept accept

LocalTicket
    ticket    TicketId
    discuss   DiscussionId
    followers FollowerSetId

    UniqueLocalTicket           ticket
    UniqueLocalTicketDiscussion discuss
    UniqueLocalTicketFollowers  followers