Birth and death dates

  1. Bet: yyyy-yyyy. Indicates a date between those years.
  2. Abt: yyyy or mm-yyyy. Indicates a date near a year or month and year.
  3. Aft: yyyy. After a year.
  4. Bef: yyyy. Before a year.
  5. Knw: mm-dd-yyyy. Indicates a known month, day, and year.
  6. Year: yyyy. Indicates a known year, but not the day or month.