Whether it is read · The estate size · Element
The rhythm
How often retirement happens.
The part
What it is
Annually is enough for most estates. The purpose is to make removal routine rather than exceptional.
A scheduled review with a default of retirement for the unused makes the exercise short.
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.