Growth and direction · The rate · Element
The growth
The rate itself, in volume and in value.
The part
What it is
Both, because they diverge. Value growth with volume decline means price is rising, which favours incumbents and penalises new entrants.
Compound rather than year-on-year, so that a single unusual year does not dominate.
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.