MDS - How to force column dependency in the entity?

Hi,

Systems: SQL Server 2012 BI Edition with Master Data Services (MDS) & Data Quality Services (DQS).

Problem: Currently Products table is managed in Excel only & is not on MDS. 

Solution: Create Entity in MDS that has business rules & user interfaces.

Question:

I have created the domain & a few entities:

1. Product category
2. Product sub category
3. Product super category
4. Product source control

Product source control entity has 3 domain based attributes that are based on the other entities. (Product / Product Category / Product Super-Category) & it is working fine so far.

I want to force dependency among the categories.  Currently, those attributes are independent in MDS; however, the do have foreign key relationship in the SQL Server.

How can I implement column dependency in MDS so when user selects "Cheap Mountain Bikes" in the Product attribute, "Mountain Bikes" & "Bikes" are selected/enforced automatically in Category & Super Categories respectively.

Currently, use is able to select green tea in the product & bikes in the super category.

Thank you.