Choosing what to measure · The chosen set · Element

The rejected

Candidates not chosen, with the reason.

The part

What it is

Kept so that the same measure is not proposed annually by someone who has not seen the reasoning.

A candidate rejected for collectability may become viable later, which is worth noting.

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.