anchor.diff:  ################################################################
   
   # Each sync channel binds two CALENDARS (see below) for
  -# data-synchronization.  Currently, STRATEGY allows only "mirror",
  -# CALENDAR1 must be a local MHC calendar, and CALENDAR2 must be a
  -# Google Calendar.  True two-way sync is not yet implemented.
  +# data-synchronization.  Currently, STRATEGY allows:
  +#
  +# + "mirror" :: mirrors CALENDAR1 to CALENDAR2.
  +#               CALENDAR1 must be a local MHC calendar,
  +#               and CALENDAR2 must be a Google Calendar.
  +#               Note that articles between past 90 days and future 90
  +#               days in MHC will be mirrored to the target Google
  +#               Calendar.  90 is hard-coded in lib/mhc/calendar.rb for
  +#               now. Other articles out of the range in Google
  +#               Calendar will be DELETED.
  +# + "import" :: imports newly created (non-recurring) articles
  +#               on CALENDAR1 into CALENDAR2.
  +#               CALENDAR1 must be a Google Calendar,
  +#               and CALENDAR2 must be a local MHC calendar.
  +#               All articles in CALENDAR1 will be DELETED after
  +#               the import.
  +#
  +# True two-way sync is not yet implemented.
   
   - NAME: business
     CALENDAR1: business
  
positive.code:   CALENDAR1: family
    CALENDAR2: google_family
    STRATEGY: mirror
  
  ################################################################
  CALENDARS:
  
negative.code: - <<: *google_default
    NAME: google_family
    URL: "https://calendar.google.com/calendar/dav/***@group.calendar.google.com/events/"
  
  # Displayname: Spool calendar to which Android adds articles
  - <<: *google_default
    NAME: google_inbox
    URL: https://calendar.google.com/calendar/dav/**************************@group.calendar.google.com/events/
  