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Dynamic Security in a denormalized Parent-Child dimension Table

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Hi guys, I need your priceless help again:I have a parent child relationship in a table with a fixed depth, let´s say Region-->Area-->CountryI denormalized the table to have something like this[img]http://i623.photobucket.com/albums/tt313/pauldj54/Blog/flattened%20hierarchy.jpg[/img]Then, to implement dynamic security, I think in a bridge table with the userId and the CountryId, then with a measure group and a measure which count the combination of user/country I can proof the security using the non empty function.My question is how can I also set security for the levels above the leaf members, let´s say, I want to assign an user to the Area level or Region Level. I don't know exactly which key could I include in the bridge table.I may want to keep the id´s of the original table in the different levels.Any comment will be appreciated.Kind Regards,

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