The signals · The accuracy · Element
The rate
How often the inference is correct.
The part
What it is
Measured against a sample where the truth is known, which is usually available from stated preferences or from support records.
Rarely measured at all, because the inference is generated by a system that reports confidence rather than accuracy.
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.