9.13 Start conditions

There're several ways to stop task execution, until one or more events occures.

A task can wait a minimum time (`hmin' condition) : it won't start before this time. A task can wait a maximum time (`hmax' condition) : it will start at this time even if other conditions are not validated.

A task can wait for a file presence (`file' condition), or a manual confirmation which is given by an human or by an external program (`manual' condition).

A task can wait for a variable value to be equal to (`if_equal') or to be different from a specified value (`if_not_equal' condition).

A task can wait until an `to late' time (`hlate' condition) : If the task is not started at the given time because other conditions are not validated, then the task will be canceled.