Routing · The outcome · Element
The response
What the receiving function did.
The part
What it is
Changed something, decided not to, or nothing. The third is the most common and the least recorded.
A stated decision not to act is a legitimate outcome and closes the item.
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.