Proof · The proof set · Element
The currency
How current the evidence is, and when it needs renewing.
The part
What it is
Evidence ages in ways claims do not. A benchmark from three product versions ago supports nothing about the present one.
Customer references age fastest, because the people who gave them move on.
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.
Evidence date
When the evidence was produced, which is what determines whether it still applies.
Date shared type