[rules-users] How to say that two events have to happen during the same time interval
Tina Vießmann
tviessmann at stud.hs-bremen.de
Thu Jan 13 14:27:15 EST 2011
Ok, I thought about using temporal operators. But I think using your
eval()-condition would be more performance-friendly than several
temporal operators.
I will think about your calculation. Thank you! :)
~Tina
> Given that sA, eA, dB are start time, end time and duration of event
> A, we have, for any two events, the interval [s,e] containing both
> defined by:
> s = min( sA, sB )
> e = max( eA, eB ) = max( sA+dA, sB+dB )
>
> Thus, the condition for A and B happening withing an interval of
> duration D is:
> e - s <= D
>
> You can put this expression into an eval() CE.
>
> -W
>
>
> On 13 January 2011 15:45, Tina Vießmann <tviessmann at stud.hs-bremen.de
> <mailto:tviessmann at stud.hs-bremen.de>> wrote:
>
> Hi,
>
> I'm trying to find a easy way to express that two events A and B
> have to
> happen during the same time interval. The events have each a
> duration >
> 0.
>
> A example condition could be: The event A and B have to happen
> during the
> same 60 seconds.
> For me it includes several possibilites:
> * A can start before B and
> ~ end before B starts
> ~ end during B
> ~ end after B ends
> * The same can be possible for B
> * A and B start/end/both at the same time
> In any case the maximum duration from the first start time to the
> last end
> time is e.g. 60s.
>
> Is there a easy way to express that. I can only think of
> specifying the
> several possibilities as conditions.
>
> Thank you! :)
> Tina
>
>
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