Acting on it · The implementation · Element
The rate
What proportion of recommendations get implemented.
The part
What it is
Tracked over time. A rate near zero means the function is producing documents; a rate near one means it is only recommending the obvious.
Somewhere in between is healthy, and knowing where is more useful than any quality review.
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.