Ownership · The owner · Element
The scope
What they are accountable for.
The part
What it is
Correctness, completeness, definition, access decisions and retention. Not all owners hold all five and that should be explicit.
Where an owner is accountable for correctness without authority over collection, the arrangement will not work.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.