Domain Viability State

Plain-language definition

One separately evidenced stage among character encoding, IDNA validity, registry policy, registration, delegation, resolution, certificate coverage, and service operation.

The definition is intentionally bounded. It identifies the property or role under discussion without converting terminology into a claim of deployment, recognition, personhood, citizenship, sovereignty, or authority.

Technical definition

Within the K01 knowledge model, Domain Viability State is represented as a stable term object with code K01-TERM-219, canonical URL, claim status, topic owner, source links, related terms, last-reviewed date, research cutoff, and correction state. Relevant implementation components for the owning topic include U-label and A-label registry; NFC validation; canonical host records; domain-state evidence; visible cross-script aliases; accessible transliteration; structured data parity; correction and currentness records.

Legal or policy use

Registry policy, trademark, consumer-protection, accessibility, security, and service obligations remain jurisdictional and operational questions beyond Unicode or IDNA conformance.

When a statute, regulation, standard, or external institution uses a different definition, that source-specific meaning controls the analysis of that source. The project definition is not silently substituted into current law.

What the term implies

The term implies that the stated property should be evaluated using the evidence appropriate to Unicode, normalization, IDNA, Punycode, domain lifecycle, browser rendering, cross-script retrieval, accessibility, and project identity boundaries. It supports precise reference, comparison, data exchange, and correction across public prose and machine records.

What the term does not imply

No earlier stage guarantees a later stage.

It also does not convert a valid signature, credential, database record, model hash, or website into factual truth or legal authority without additional evidence and a competent decision.

Commonly confused terms

• U-label
• A-label
• Event-level provenance
• IDN state observation
• Primary-source review queue
• IDN observation diff

Confusion is resolved by asking which property is actually at issue: technical control, continuity, evidence, authority, legal recognition, operation, or normative status.

Operational test

1. Name the subject and purpose.
2. Identify the source definition and jurisdiction or technical context.
3. Collect evidence for the specific property.
4. Record currentness and limitations.
5. Route any governance, registry, assurance, or capital decision to the proper authority.

Related questions

• Does a Punycode label prove that a domain is live?
• How should Runic pages be made discoverable?
• Why must IDN lifecycle states remain separate?
• How are unsupported history events quarantined?
• Can a history event be promoted by a signature alone?
• What does an IDN observation diff prove?
• Does an evidence-acquisition docket verify history?
• What does a signed domain observation chain prove?

Sources

• Unicode 17.0 Runic Code Chart — Unicode Consortium; Unicode 17.0; OFFICIAL CHARACTER CODE CHART. Exact claim-support entries: 1. Revalidated 2026-08-15T23:55:00Z.
• Unicode Standard Annex #15 — Unicode Normalization Forms — Unicode Consortium; Unicode 17.0.0, Revision 57; UNICODE STANDARD ANNEX. Exact claim-support entries: 1. Revalidated 2026-08-15T23:55:00Z.
• RFC 3492 — Punycode: A Bootstring Encoding of Unicode for IDNA — IETF / RFC Editor; RFC 3492; PROPOSED STANDARD; UPDATED BY RFC 5891. Exact claim-support entries: 1. Revalidated 2026-08-15T23:55:00Z.
• RFC 5890 — IDNA Definitions and Document Framework — IETF / RFC Editor; RFC 5890; PROPOSED STANDARD. Exact claim-support entries: 1. Revalidated 2026-08-15T23:55:00Z.
• RFC 5891 — Internationalized Domain Names in Applications: Protocol — IETF / RFC Editor; RFC 5891; PROPOSED STANDARD. Exact claim-support entries: 1. Revalidated 2026-08-15T23:55:00Z.

Stable term code: K01-TERM-219. Last reviewed 2026-08-16.