Continuity of state · The repetition measure · Element
The rate
How often it happens.
The part
What it is
As a share of interactions involving more than one contact, since single-contact interactions cannot produce it.
Broken down by crossing, since the rate varies enormously between channel pairs.
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.