Reading the signal · The categories · Element
The set
The categories comments are coded into.
The part
What it is
Ten to fifteen is workable. Fewer loses meaning; more is applied inconsistently by whoever is coding.
Derived from a first pass over several hundred comments rather than designed in advance.
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.