Definitions · The calculation · Element
The formula
How the number is computed.
The part
What it is
Written so that someone with the raw data could reproduce it, including the denominator where the measure is a rate.
Rates need particular care: the denominator is where most rate disagreements originate.
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.