Rule Use
What It Models
A rule use applies shared qualification logic to a particular application decision.
Identity and Attributes
It combines the consumer reference, release selection, parameters, uncertainty policy and availability.
Relationships
Eligibility owns the connection; the consuming application retains its own business record.
Invariants
Compatibility is a service check, while uniqueness and pin shape also have database constraints.
How It Is Stored and Shared
Eligibility stores uses and plans. Applications call its evaluation and binding contracts; neither record declares custom fields.
Open Design Questions
Changing products between rules is not atomic in the current browser orchestration, and ownership checks on the consumer record remain a planning disagreement.