If required, you may set this Seed attribute to a value of your choosing in order to produce repeatable behaviour from the random number functions. You may also enquire the Seed value (e.g. if an initially unpredictable value has been used) and then use it to reproduce the resulting sequence of random numbers, either from the same MathMap or from another one.
Clearing the Seed attribute gives it a new unpredictable default value.
AST A Library for Handling World Coordinate Systems in Astronomy