Timetype

["Björn Lundin" <bjorn.lundin@swipnet.se>]

Hello1
Can anyone explain this to me?

cut from a-calend.ads
--  Declarations representing limits of allowed local time values. Note that
--  these do NOT constrain the possible stored values of time which may well
--  permit a larger range of times (this is explicitly allowed in Ada 95).

   subtype Year_Number  is Integer range 1901 .. 2099;


Does it mean that i can write an application dealing with historical dates 
using the time_type?

It seems to me that a date like 05-Jun-1712 would cause
constraint_error.

Does anyone know the reason for this small range of years in
the timetype?

/Bj�rn