Link Hashkeys should be generated using the Business Keys participating in the Link, and not the Hashkeys of of the Hubs. Hashing a hash is just bad design.
A Satellite contains the descriptive attributes of a Business Key. As such, a Satellite HASHDIFF should be constructed using the only the descriptive attributes of the Business Key. The Business Key, itself, should not be part of the Satellite HASHDIFF. Note: While it is a common practice to include the Business Keys in the SAT … Data Vault Anti-pattern: Including Business Keys in the SAT HASHDIFF
Dependent Children should not have their own Hubs. They are not Business Concepts and as such should not be a Business Key by themselves. They only make sense when associated with a Business concept. One example is Line Items in a Order. The Line Item in Order by itself does not make sense. It needs to … Data Vault Anti-pattern: Creating Hubs for Dependent Children