Choose the question
UI nodes and business resourcesEvents and permissionsDisplays and synchronisationUI nodes are not business records
| Layer | Responsibility |
|---|---|
| Resource / provider | Business state and operations |
| AUP node | Interface structure and explicit bindings |
| Local view state | Selection, expansion, temporary feedback |
Follow the event, not just the click
Gesture → event binding → target + arguments → authorised execution → result → view update
Inspect every boundary. A visible button proves none of the later steps.
Event walkthroughA second display needs a policy
Shared business context does not require shared navigation.
Who follows the presenter? Who can browse independently? Who may mutate?
Display modelCan the provider change without changing the work?
Keep identifiers meaningful. Preserve operation semantics. Test failures as well as success.
Provider substitution is a separate experiment; the UI-node demonstration does not establish it.
Provider conformance