On Friday 30 November 2007 18:37:31 Michael Hennebry wrote:
> Probably what you want are binaries based on start times.
> You don't need to explicitly mark every period of a class.
OK i understand it. But the question now is how to implement a constraint that 
if an hour is marked as a start time of a session  it is impossible to mark 
as a start time of another session following [sessions's duration - 1 ] 
hours.


-- 
O. Ican


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