Gathering it · The coverage · Element

The respondents

Who actually answers.

The part

What it is

Compared with the customer base on the dimensions that matter — size, tenure, segment, recency of contact.

Divergence on any of them means the feedback describes a subset rather than the base.

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.