Follow the reason into the definition
A captured business decision is linked to a reviewed requirement with a source and an owner. Discovery records what the source can actually support. Modeling translates that requirement into a design, and metadata carries the design into transformation rules.
The links support review in both directions: from the original reason toward implementation, and from a transformation back to its model, discovery findings, requirement, and source evidence. A rule can be examined in context rather than interpreted in isolation.