Plain English
Normalization makes text comparable before a registry lookup.
Technical summary
The public demo defaults to NFC, allows NFKC as an explicit review choice, and reports when normalized input differs from raw input.
Deep spec
Normalization is a transport and canonicalization rule. It does not assign semantic authority; the registry record and validation evidence do that.
Review rules
- Default to NFC for public demo records.
- Use NFKC only when compatibility folding is intentional and reviewed.
- Keep locale and direction visible on envelopes.
- Warn on bidi controls, variation selectors, invisible controls, and private-use characters.