One identity · The failure rate · Element
The false matches
How often two different people are joined.
The part
What it is
Shared devices, family email addresses and common names all produce this. The consequence ranges from confusing to a data breach.
The rate should be near zero for anything showing personal information, which means deterministic matching for those uses.
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.