class hierarchy:

MAPIStoreContext
  MAPIStoreGCSBaseContext
    MAPIStoreCalendarContext
    MAPIStoreContactsContext
    MAPIStoreTasksContext
  MAPIStoreFileSystemBaseContext
    MAPIStoreCommonViewsContext
    MAPIStoreDeferredActionsContext
    MAPIStoreDraftsContext
    MAPIStoreJournalContext
    MAPIStoreNotesContext
    MAPIStoreRemindersContext
    MAPIStoreSearchContext
    MAPIStoreSentItemsContext
    MAPIStoreShortcutsContext

    (undecided:)
    DeletedItems (trash IMAP folder?)
    Freebusy (needs info)
    Schedule (needs info + purpose?)
    Views (needs info + purpose)
  MAPIStoreMailContext
    MAPIStoreOutboxContext
      MAPIStoreSpoolerContext