The expected effect

What the change should produce.

The part

What it is

On a specific measure, stated before the change so it can be checked afterwards.

Where no measure can be named, the change is being made on the strength of the story rather than on evidence, which is sometimes right and should be visible.

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.