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SharePoint 2010 search , external data and refinements

Posted By:      Posted Date: September 24, 2010    Points: 0   Category :SharePoint
Hello All,
I have an external list "Category" from NorthWind database in my SharePoint site. I have a SharePoint list "Vendor" which has lookup column from this category list. Now how I can configure to show refinements based on my categories in Category List. So if I search for some vendor, I will get refinements based on CategoryName.

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