Definition

<Relative Time Point>, <Absolute Time Interval>, and <Relative Time Interval> may each have a component <Absolute Time Point>, and the restrictions on their field values depend on the value of the <Absolute Time Point> component, when it is present.

1. If an <Absolute Time Point> is present with day = -1, then

   1.1	for <Absolute Time Interval> and <Relative Time Point>, delta_days = 0.
   1.2	for <Relative Time Interval>, delta_start_days = delta_stop_days = 0.

2. For <Absolute Time Interval> and <Relative Time Point>, if an <Absolute Time Point> is present with day <> -1 and month = SE_MONTH_ANY, then delta_days shall be in the range
   (1 - day) to (30 - day)
   where day is the <Absolute Time Point>'s day field.

   Note that delta_days is allowed to be negative for this case.

3. For <Absolute Time Interval> and <Relative Time Point>, if an <Absolute Time Point> is present with day <> -1, month = SE_MONTH_USE_DAY_OF_YEAR, and year = -1, then delta_days shall be between 0 and 365 inclusive.
4. If no <Absolute Time Point> component is present, or restrictions 1-3 do not apply, then delta_days has no constraints for Time Dependency.
5. For any <Absolute Time Point>, if month = SE_MONTH_USE_DAY_OF_YEAR, then day cannot = -1.

Rationale

1. Since an <Absolute Time Point> with day = -1 indicates that day is not applicable, no meaningful delta values can be applied to the day value for this case.
2. <Time Intervals> that are referenced to an <Absolute Time Point> with month = SE_MONTH_ANY are assumed to have a 30 day month, and the interval cannot exceed a 30 day period.
3. When using day of year (rather than explicitly specifying the month) for an unspecified year = -1, the year is assumed to be a 365-day year.
4. Rule 4 only applies to the cases explicitly stated by the rule.
5. If the day of the year is specified rather than a specific month, then the day shall fall within the bounds of a 365-day year (negative days in a year are not defined).

Example

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