Datum objects

Legal datum objects are:

  • ai: ASCII integer; optional sign and digits (0-9)
  • ch: string/character data. This is similar to st.
  • dt: ?cc?yymmdd
  • ed: date; ddmm?cc?yy
  • fd: mm/dd/?cc?yy
  • fe: dd/mm/?cc?yy
  • jd: ?cc?yy?ddd (Julian)
  • nm: numeric; optional sign, digits, optional decimal point
  • null: present, but empty value
  • st: string/character data. This is similar to ch
  • tm: hhmm[ss][+/-zzzz] (time plus optional timezone)
  • ts: ccyymmddhhmm[ss][+/-zzzz]
  • ut: Day Mon dd hh:mm:ss ccyy
  • yd: mmdd?cc?yy