The age assurance attribute

What the clause says

The framework counts age in years as a real number since birth. A relying party can ask for an actual age, an over-age, an under-age or a range. The first three are single values; a range is a pair. An under-age and a range have time-limited validity.

What it supplies to a comparison

The attribute form decides the metric. A binary over-age is scored with true and false positives; a continuous age is scored with an error distribution; a range needs a rule for the boundaries.

Evidence to keep

• The attribute form requested by the relying party, written as a rule.
• The validity period and the refresh rule for a time-limited attribute.

What the evidence looks like

For 5, the first artefact is The attribute form requested by the relying party, written as a rule.. The second is The validity period and the refresh rule for a time-limited attribute.. If 5 has no first artefact, the practice is unproven at 5, and the report should record the absence rather than infer the practice from a policy.

Questions for the provider

1. Which of the four forms does the decision need?
2. How does the system handle the expiry of an under-age or range attribute?

How it connects to the draft

The age assurance attribute belongs to 5 attribute, and it gives the analysis one fixed point: The attribute form decides the metric. A binary over-age is scored with true and false positives; a continuous age is scored with an error distributio. A comparison that cannot place a result against 5 is measuring something the framework has not defined, and the report should say so.

In the register, 5 is read beside the unit that tests it, and where it sets an objective rather than a number, that unit turns the objective into a question and an evidence artefact.