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I try to create model to selection feature by attribute with 3 variables which depend on each other but i don't know how.
for example:
variables: kat_1, kat_2, kat_3
Kat_1{ gastronomy, education, sport, religion}
Kat_2{bar,restaurant, kindergarten, elementary school, middle school, high school, church, cemetery, playground, pool, tennis}

how to create some filtr which works that when I choose gastronomy from kat_1 then it only allow me to choose bar or restaurant from kat_2?

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You should be able to do this using tool validation and a little Python. I think there is an example in the online help which I'll try to locate later if you have not already. – PolyGeo May 5 '13 at 19:44

The way to do this using tool validation is described in this 10.1 Help Page which should apply equally to 10.0.

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