  RefTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$RefTime" }
  SimpleTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$SimpleTime" }
  InexactTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$InexactTime" }
  InexactDuration = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$InexactDuration" }
  DurationWithFields = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$DurationWithFields" }
  //Duration = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$Duration" }
  IsoDate = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$IsoDate" }
  IsoTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$IsoTime" }
  TimeRange = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$Range" }
  TimeWithRange = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$TimeWithRange" }
  RelativeTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$RelativeTime" }
  OrdinalTime = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$OrdinalTime" }
  PeriodicTemporalSet = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$PeriodicTemporalSet" }
  ExplicitTemporalSet = { type: "CLASS", value: "edu.stanford.nlp.time.SUTime$ExplicitTemporalSet" }

  ANY = -1;
  NONE = -1;
  NON_TEMPORAL = "NON_TEMPORAL";

  DURATION_UNKNOWN = DurationWithFields();
  DURATION_NONE = DurationWithFields();

  TIME_NOW = {
    type: REFTIME,
	label: "PRESENT_REF",
	value: RefTime("NOW")
  }
  TIME_PRESENT = {
    type: REFDATE,
	label: "PRESENT_REF",
	value: InexactTime( TimeRange(TIME_NOW, TIME_NOW) )
  }
  TIME_PAST = {
    type: REFDATE,
	label: "PAST_REF",
	value: InexactTime( TimeRange(TIME_UNKNOWN, TIME_NOW) )
  }
  TIME_FUTURE = {
    type: REFDATE,
	label: "FUTURE_REF",
	value: InexactTime( TimeRange(TIME_NOW, TIME_UNKNOWN) )
  }

  // Predefined durations: YEAR, MONTH, DAY, WEEK, HOUR, MINUTE, SECOND
  FORTNIGHT = { type: "TIMEUNIT", value: Duration(WEEK, 2) };
  HALFHOUR = Duration(MINUTE, 30);
  QUARTERHOUR = Duration(MINUTE, 15);

  // Basic dates/times
  MONDAY = DayOfWeek(1);
  TUESDAY = DayOfWeek(2);
  WEDNESDAY = DayOfWeek(3);
  THURSDAY = DayOfWeek(4);
  FRIDAY = DayOfWeek(5);
  SATURDAY = DayOfWeek(6);
  SUNDAY = DayOfWeek(7);

  WEEKDAY = {
    type: DAYS_OF_WEEK,
    label: "WD",
    value: TimeWithRange(TimeRange(MONDAY, FRIDAY, Duration(DAY, 5)))
  }

  WEEKEND = {
    type: DAYS_OF_WEEK,
    label: "WE",
    value: TimeWithRange(TimeRange(SATURDAY, SUNDAY, Duration(DAY, 2)))
  } 

  JANUARY = MonthOfYear(1);
  FEBRUARY = MonthOfYear(2);
  MARCH = MonthOfYear(3);
  APRIL = MonthOfYear(4);
  MAY = MonthOfYear(5);
  JUNE = MonthOfYear(6);
  JULY = MonthOfYear(7);
  AUGUST = MonthOfYear(8);
  SEPTEMBER = MonthOfYear(9);
  OCTOBER = MonthOfYear(10);
  NOVEMBER = MonthOfYear(11);
  DECEMBER = MonthOfYear(12);

  // Dates are rough with respect to northern hemisphere (actual
  // solstice/equinox days depend on the year)
  SPRING_EQUINOX = {
    type: DAY_OF_YEAR,
	value: InexactTime( TimeRange( IsoDate(ANY, 3, 20), IsoDate(ANY, 3, 21) ) )
  }
  SUMMER_SOLSTICE = {
    type: DAY_OF_YEAR,
	value: InexactTime( TimeRange( IsoDate(ANY, 6, 20), IsoDate(ANY, 6, 21) ) )
  }
  FALL_EQUINOX = {
    type: DAY_OF_YEAR,
	value: InexactTime( TimeRange( IsoDate(ANY, 9, 22), IsoDate(ANY, 9, 23) ) )
  }
  WINTER_SOLSTICE = {
    type: DAY_OF_YEAR,
	value: InexactTime( TimeRange( IsoDate(ANY, 12, 21), IsoDate(ANY, 12, 22) ) )
  }

  // Dates for seasons are rough with respect to northern hemisphere
  SPRING = {
      type: SEASON_OF_YEAR,
      label: "SP",
      value: InexactTime( SPRING_EQUINOX, QUARTER, TimeRange( MARCH, JUNE, QUARTER ) ) }
  SUMMER = {
      type: SEASON_OF_YEAR,
      label: "SU",
      value: InexactTime( SUMMER_SOLSTICE, QUARTER, TimeRange( JUNE, SEPTEMBER, QUARTER ) )
  }
  FALL = {
      type: SEASON_OF_YEAR,
      label: "FA",
      value: InexactTime( FALL_EQUINOX, QUARTER, TimeRange( SEPTEMBER, DECEMBER, QUARTER ) )
  }
  WINTER = {
      type: SEASON_OF_YEAR,
      label: "WI",
      value: InexactTime( WINTER_SOLSTICE, QUARTER, TimeRange( DECEMBER, MARCH, QUARTER ) )
  }

  // Time of day
  NOON = IsoTime( 12, 0, NONE )
  MIDNIGHT = IsoTime( 0, 0, NONE )
  MORNING = {	      
      type: TIME_OF_DAY,
      label: "MO",
      value: InexactTime( TimeRange ( IsoTime( 6, NONE, NONE), NOON ) )
  }
  AM = IsoTime(NIL, NIL, NIL, NIL, HALFDAY_AM)
  PM = IsoTime(NIL, NIL, NIL, NIL, HALFDAY_PM)
  AFTERNOON = {	      
      type: TIME_OF_DAY,
      label: "AF",
      value: InexactTime( TimeRange ( NOON, IsoTime( 18, NONE, NONE) ) )
  }
  EVENING = {
      type: TIME_OF_DAY,
      label: "EV",
      value: InexactTime( TimeRange ( IsoTime( 18, NONE, NONE), IsoTime ( 20, NONE, NONE) ) )
  }
  NIGHT = {	      
      type: TIME_OF_DAY,
      label: "NI",
      value: InexactTime( MIDNIGHT, TimeRange ( IsoTime( 19, NONE, NONE), Duration(HOUR, 10) ) )
  }

  SUNRISE = {
      type: TIME_OF_DAY,
      label: "MO",
      modifier: "EARLY"
  }

  SUNSET = {
      type: TIME_OF_DAY,
      label: "EV",
      modifier: "EARLY"
  }

  DAWN = {
      type: TIME_OF_DAY,
      label: "MO",
      modifier: "EARLY"
  }

  DUSK = {
      type: TIME_OF_DAY,
      label: "EV",
      modifier: "EARLY"
  }

  LUNCHTIME = InexactTime( TimeRange( IsoTime(12, NONE, NONE), IsoTime(14, NONE, NONE) ))
  TEATIME = InexactTime( TimeRange( IsoTime(15, NONE, NONE), IsoTime(17, NONE, NONE) ))
  DINNERTIME = InexactTime( TimeRange( IsoTime(18, NONE, NONE), IsoTime(20, NONE, NONE) ))

  DAYTIME = {
     type: TIME_OF_DAY,
     label: "DT",
     value: InexactTime( TimeRange(DAWN, SUNSET) )
  }
  MORNING_TWILIGHT = {
     type: TIME_OF_DAY,
     label: "MO",
     value: InexactTime( TimeRange(DAWN, SUNRISE) )
  }
  EVENING_TWILIGHT = {
     type: TIME_OF_DAY,
     label: "EV",
     value: InexactTime( TimeRange(SUNSET, DUSK) )
  }
  // For now, just have TWILIGHT be same as EVENING_TWILIGHT (could possibly be MORNING_TWILIGHT || EVENING_TWILIGHT)
  TWILIGHT = EVENING_TWILIGHT

  // Relative days
  YESTERDAY = RelativeTime( Duration(DAY, -1) );
  TOMORROW = RelativeTime( Duration(DAY, +1) );
  TODAY = RelativeTime( THIS, DAY );
  TONIGHT = RelativeTime( THIS, NIGHT );  
  
  HOURLY = PeriodicTemporalSet(NIL, HOUR, "EVERY", "P1X");
  NIGHTLY = PeriodicTemporalSet(NIGHT, DAY, "EVERY", "P1X");
  DAILY = PeriodicTemporalSet(NIL, DAY, "EVERY", "P1X");
  MONTHLY = PeriodicTemporalSet(NIL, MONTH, "EVERY", "P1X");
  QUARTERLY = PeriodicTemporalSet(NIL, QUARTER, "EVERY", "P1X");
  YEARLY = PeriodicTemporalSet(NIL, YEAR, "EVERY", "P1X");
  WEEKLY = PeriodicTemporalSet(NIL, WEEK, "EVERY", "P1X");    
