The break

Where the trend becomes non-comparable.

The part

What it is

Marked on every chart showing the measure, so that a reader does not interpret the discontinuity as a change in performance.

The size of the break is worth stating where it can be estimated by calculating both ways for one period.

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.

Break at
Where comparability ends.
Date shared type
Size of break
How much the definition change moved the number.
Measure shared type
Marked on charts
Whether readers can see it.
Choice shared type