I am trying to make sure the Part ItemType is correct (our database is a bit messed up). I have been going through and reviewing the information provided in the SolutionImportAML files and found a difference between the item_number property. My system has <is_keyed>0</is_keyed>, but the file has <is_keyed>1</is_keyed>. I want to understand what this is for before I change it. Thank you.