Person
RemoteActor
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

TicketAuthorRemote
    ticket TicketContextLocalId
    ticketNew TicketId
    author RemoteActorId
    open   RemoteActivityId

    UniqueTicketAuthorRemote     ticket
    UniqueTicketAuthorRemoteOpen open

TicketContextLocal
    ticket  TicketId
    accept  OutboxItemId

    UniqueTicketContextLocal       ticket
    UniqueTicketContextLocalAccept accept