Confirm Links correctly map relationships between Hubs. Test for referential integrity (though often not enforced by DB constraints in DV, it must be validated via query).
The "Information Mart" layer is where users actually query the data. Testing Data Vault-Based Data Warehouse
You should be able to trace any record in a Star Schema back to its specific Hub and Source system. Confirm Links correctly map relationships between Hubs
Run row counts and sum-checks between the Source Landing Zone and the Raw Vault. Testing Data Vault-Based Data Warehouse