Thank you !
It's a good solution and i already use it,
Now i'm trying to optimize or find a better solution, coz, on site, i don't have time to write propreties in excel,
Graphisoft should push in this way and think about a good solution, bimx can help if they add to it such a fonctionality,
Bimx would be agreat tool not just to visualize, but also to track project building