pretransformation rule based on item attribute

Summary:

I want to create a pretransformation rule based on if an item is shippable or not. I used shippable flag as N but the rule did not get triggered. I see that item attribute is obsolete in pretransformation rule. Please let me know if I cannot use item attributes in pretransformation rule or if there is any other means of creating pretransformation rule based on if the item is shippable or not.