security-canon/docs/adr-002-terminology-separation.md
tegwick a4ec38feb2 Promote Mode of Authority to a canon artifact (T06, T07)
Publishes sec-authority:ModeOfAuthority v0.2.0 with machine-readable
auth-modes.yaml and dimensions.yaml, and moves the v0.1 draft verbatim to
research/ as provenance — it had been sitting in spec/, which the Repository
Layout Standard reserves for implementation guidance.

Terminology separation decided as SECURITY-DEC-2026-002 / SEC-ADR-002. The
v0.1 Subject dimension becomes AuthorityContext, because InfoTechCanon's
access-control model already owns Actor and Subject and binds them as "Subject
is the access-control view of an actor"; reusing the pair for two distinct
parties would have made one word mean two things across the canons. Operator
versus OPERATE, Build Plane versus CONSTRUCT, Policy Plane versus GOVERN, Audit
Plane versus EvidenceBoundary and Condition versus Activation are separated
rather than merged, and Scope, AccessOperations, Purpose and PrincipalType are
declared imports. Namespace sec-authority: reserved; itc-caring: and itc-access:
stay upstream and are not aliased.

Two of the draft's open questions are closed. CONSTRUCT stays distinct from
GOVERN, the test being the object of authority — the artifact versus the
constraint it must satisfy — which keeps "who may edit the policy" separable
from "who decides what it must say". Substrate authority becomes a DOMINATES
relation between Authority Realms carrying dominance_kind, observable and
evidence_boundary, which makes the relative-sovereignty principle checkable
instead of merely asserted.

Orientation surfaces published: the one-page vocabulary card, the ten-question
design heuristic promoted from the draft's appendix to section 3 of the
artifact, the role/plane/mode disambiguation page, and the cross-layer mapping
to InfoTechCanon with its deliberate blanks where one layer has no equivalent.

Generalising CARING section 32 beyond non-human subjects is deliberately not
bundled in; it is InfoTechCanon's to accept as a demand signal.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AUkN13CAqtXWPXuEiEtmJj

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 36656@bnt-lap001
Assistant-Session: 66d6eece-d245-43ca-85e8-68a1b5970a67
2026-09-20 21:43:11 +02:00

3.4 KiB

id decision_record type title repo status decided implements
SEC-ADR-002 SECURITY-DEC-2026-002 adr Terminology separation between Auth Mode and the implementation layer security-canon accepted 2026-09-20 SEC-ADR-001 D2

SEC-ADR-002 — Terminology separation

Applies SEC-ADR-001 D2 — different layers must not use the same word for different things — to the concrete overlaps between the Mode of Authority vocabulary, InfoTechCanon's access-control model, and CARING.

Decision

D1 — Subject becomes AuthorityContext

InfoTechCanon's access-control model §11.2 owns Actor and Subject and binds them: "Subject is the access-control view of an actor." The v0.1 draft used the same two words for two distinct parties. The vocabulary renames its dimension to AuthorityContext, with a companion relation field taking DELEGATED or IMPERSONATED.

Actor is kept, because MoA's use is compatible with the Organization Model's ownership of actor semantics. AuthorityContext names what the field holds — the authority drawn on — which stays accurate when the target is a role or mandate rather than a person.

Rejected: adopting CARING's Principal/Delegator naming, which would import implementation vocabulary into the architecture layer; and changing InfoTechCanon, which would edit a release-candidate standard and eleven dependent models to accommodate a draft.

D2 — Overlapping dimensions are separated, not merged

Pair Resolution
Operator role vs OPERATE mode Both kept — different axes. Never write bare operator; the disambiguation page is the required companion.
Build Plane vs CONSTRUCT Both kept. Plane is the surface, mode is the authority over it. CONSTRUCT @ build-plane is well formed.
Policy Plane vs GOVERN Both kept. ADMINISTER over the Policy Plane is not GOVERN.
Audit Plane vs EvidenceBoundary Both kept — genuinely different. A rich Audit Plane may accompany a worthless Evidence Boundary.
CARING Condition vs Activation Both kept as layer expressions of one idea. Activation is the architecture term.
CARING Capability vs AccessOperations No new term. Imported from InfoTechCanon's access-control model.
Scope One definition, InfoTechCanon's, imported.

D3 — Namespace

The vocabulary takes sec-authority:. itc-caring: and itc-access: stay with InfoTechCanon and are not aliased.

D4 — CARING §32 generalisation is not bundled here

Generalising CARING's Principal / effective actor / Delegator / audit identity role set beyond non-human subjects would be additive and non-breaking, and would close the human-on-human impersonation gap. It is InfoTechCanon's to accept, and is raised there as a demand signal on its own merits. Nothing in SecurityCanon blocks on it.

Consequences

  • The v0.1 draft's subject = field reads as authority_context = in the promoted vocabulary; the draft is retained verbatim in research/ and the rename is recorded in its §12 change list.
  • A disambiguation page is a permanent part of the canon's orientation surface, not a transitional aid.
  • The mapping carries the cross-layer relationships, including the deliberate blanks where one layer has no equivalent.