Module type Span_intf.Parts

Parts represents the individual parts of a Span as if it were written out (it is the counterpart to Span.create). For example, 90 seconds is represented by:

{sign = Pos; hr = 0; min = 1; sec = 30; ms = 0; ns = 0}

The fields will always be non-negative, and will never be large enough to form the next larger unit (e.g., min < 60).