Gathering it · The instrument · Element
The questions
What is actually asked.
The part
What it is
At least one open question, since the closed ones only measure what was already suspected.
Held constant between rounds, because a reworded question breaks the comparison.
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.