Whether it is read · The estate size · Element
The flow
How many were added and removed.
The part
What it is
Both numbers, since an estate that added twelve and removed ten is healthier than one that added three and removed none.
A removal count of zero over several periods indicates that nobody owns the estate.
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.