Retention and deletion · The schedule · Element
The basis
What determines the period.
The part
What it is
A statutory obligation, a contractual requirement, a limitation period, or an assessment of how long it remains useful.
Where the basis is “it might be useful”, the period is indefinite by default and that is the situation the schedule exists to prevent.
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.