I have to maintain a Sharepoint site and I have some lookup column with empty "Get information from" data source when I go in the Site Columns/Edit Column :
Those Column present a list Parameter filtered by Content Type : in the Parameter list there is content type Country, Industry, Colors, etc.. and each of those column (used in view/new/edit form) have "empty data source"...
The real problem is that I have to add a category in the Parameter table and add it to a form but the only choice I have when I add a lookup column is the full parameter list...
How can I create a column like those "empty hidden filtered" existing one ?
