diff --git a/AGENTS.md b/AGENTS.md
index b5961427c..c927f9e61 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -372,7 +372,15 @@ The ontology namespace publishes as a deterministic GitHub Pages artifact
 bytes -- no build timestamps, source SHA-256 manifest) and deploy only
 through the fail-closed `scripts/publish_ontology_site.py` from `main`.
 A manual dispatch from another ref is not a publication path. The
-lowercase and repository-case public namespace IRIs remain a tracked
-interoperability gap ([ADR 0157](docs/adr/0157-public-ontology-namespace-identity.md),
-issue #372): do not silently rewrite either form; any namespace migration
-is a versioned ADR with compatibility mappings first.
+repository-case public namespace
+`https://contextualwisdomlab.github.io/LineageWeave/ontology#` is
+canonical ([ADR 0207](docs/adr/0207-repository-case-ontology-namespace-canonical.md),
+superseding ADR 0157, resolving issue #372); the lowercase form is a
+deprecated compatibility vocabulary with validated term-kind mappings.
+New runtime values, exports, fixtures, and database rows mint only
+repository-case IRIs; `scripts/migrate_legacy_namespace.py` rewrites
+stored lowercase IRIs (dry-run by default, never touching provenance
+columns). Do not silently rewrite either historical form. The SHACL
+shapes graph (`docs/ontology/lineageweave-kg-shapes.ttl`) is the
+closed-world data-validation boundary for DB-to-RDF projections and is
+published beside the ontology.
diff --git a/CHANGELOG.d/2.18.0-public-ontology-namespace-completeness.md b/CHANGELOG.d/2.18.0-public-ontology-namespace-completeness.md
new file mode 100644
index 000000000..2a4f860d7
--- /dev/null
+++ b/CHANGELOG.d/2.18.0-public-ontology-namespace-completeness.md
@@ -0,0 +1,41 @@
+# 2.18.0 — Public ontology namespace completeness
+
+## Added
+
+- The repository-case public ontology namespace
+  `https://contextualwisdomlab.github.io/LineageWeave/ontology#` is
+  canonical ([ADR 0207], superseding ADR 0157, resolving #372): it is the
+  exact project path GitHub Pages serves. The lowercase form is a deprecated
+  compatibility vocabulary published beside the ontology with validated
+  `owl:equivalentClass` / `owl:equivalentProperty` mappings;
+  `scripts/migrate_legacy_namespace.py` now rewrites stored lowercase IRIs to
+  the canonical spelling (dry-run by default, transactional, never touching
+  provenance columns).
+- Node-attribute datatype properties grounded in real schema columns:
+  `postTitle`, `postBody`, `eventOccurredAt` on posts;
+  `personName`, `lastKnownJobTitle` on persons; `entityName`,
+  `entityCode` on corporate entities; shared domain-free `createdAt` /
+  `updatedAt` record timestamps whose per-class cardinality lives in SHACL.
+  No property is minted for a column that does not exist.
+- A SKOS post-type concept scheme (`postTypeScheme`) formalizing the governed
+  five-value `voc_type` vocabulary (`voc`, `vocc`, `voco`, `vom`, `vop`),
+  bringing that lookup category under the ontology round-trip check for the
+  first time. Keyman job titles and industry sectors stay unmodeled free text;
+  no scheme is invented without a governed source vocabulary.
+- Logical integrity constraints: `OurSidePerson owl:disjointWith
+  CounterpartyPerson` and `hasAffiliate owl:inverseOf affiliatedWith` so
+  reasoners refuse impossible person sides and bidirectional affiliation
+  queries resolve without a second stored edge.
+- `docs/ontology/lineageweave-kg-shapes.ttl`, the closed-world SHACL shapes
+  graph validating DB-to-RDF projections: required post title/body/timestamp,
+  confidence bounded to `[0.0, 1.0]` inclusive, required names and entity
+  code, and the our-side/counterparty disjointness complement. Validated in
+  CI with pyshacl including negative violation tests; published beside the
+  ontology with dangling-target refusal in the fail-closed publisher.
+
+## Changed
+
+- Ontology publication artifacts now include the shapes graph; the build
+  manifest lists it deterministically and the documentation page links it.
+
+[ADR 0207]: docs/adr/0207-repository-case-ontology-namespace-canonical.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6ce21cd7..8c2856dc5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,25 @@ All notable changes to this project are documented here. Format follows
 
 ### Added
 
+- The repository-case public ontology namespace
+  `https://contextualwisdomlab.github.io/LineageWeave/ontology#` is canonical
+  (ADR 0207, superseding ADR 0157, resolving issue #372); the lowercase form
+  is a deprecated compatibility vocabulary with validated mappings and a
+  dry-run migration tool for stored values.
+- Closed-world SHACL validation (`docs/ontology/lineageweave-kg-shapes.ttl`,
+  pyshacl in tests): required post title/body/timestamp, project-mention
+  RDF subject/predicate/object chain, decimal confidence bounded to
+  `[0.0, 1.0]`, required person/entity names and entity code, and the
+  our-side/counterparty disjointness complement; published with
+  the ontology site and guarded against dangling shape targets.
+- Node-attribute datatype properties grounded only in real schema columns
+  (`postTitle`, `postBody`, `eventOccurredAt`, `personName`,
+  `lastKnownJobTitle`, `entityName`, `entityCode`, shared domain-free
+  `createdAt`/`updatedAt`), a SKOS post-type scheme formalizing the governed
+  five-value `voc_type` vocabulary under the round-trip check, and logical
+  constraints: `OurSidePerson owl:disjointWith CounterpartyPerson` plus the
+  `hasAffiliate` inverse of `affiliatedWith` (ADR 0207).
+
 - Buyer Calendar now consumes the Naruon calendar projection beside
   post-grounded commitments (ADR 0203 step 2 / #336). Observed occurrences
   stay evidence-only; a commitment still opens that post. The 달력
@@ -52,9 +71,6 @@ All notable changes to this project are documented here. Format follows
   retrieval, multi-thread Event Lineage answers, persisted image-evidence
   citations, and the focused evidence popup. Their implementations remain
   active-PR evidence until protected merge.
-- ADR 0157 and its exact-head inventory choose the existing lowercase public
-  ontology namespace as canonical and define the compatibility, publication,
-  and migration evidence required by issue #372 without rewriting identifiers.
 - The ontology Pages artifact now publishes the deprecated repository-case
   compatibility vocabulary after validating every mapping's term kind.
 - The PROV-O support profile now mints its product class mappings only in the
diff --git a/backend/tests/test_api.py b/backend/tests/test_api.py
index b4d0aa342..70d2f5897 100644
--- a/backend/tests/test_api.py
+++ b/backend/tests/test_api.py
@@ -1833,7 +1833,7 @@ def test_post_detail_exposes_explicit_and_semantic_project_evidence(
                     "Semantic project",
                     "project was described in the body",
                     0.82,
-                    "https://contextualwisdomlab.github.io/lineageweave/ontology#Project",
+                    "https://contextualwisdomlab.github.io/LineageWeave/ontology#Project",
                     "contextual_orchestrator_semantic",
                 ),
             )
diff --git a/docs/adr/0207-repository-case-ontology-namespace-canonical.md b/docs/adr/0207-repository-case-ontology-namespace-canonical.md
new file mode 100644
index 000000000..4b70fb45e
--- /dev/null
+++ b/docs/adr/0207-repository-case-ontology-namespace-canonical.md
@@ -0,0 +1,179 @@
+# ADR 0207 — Make the repository-case public ontology namespace canonical
+
+**Decision status:** Accepted
+**Date:** 2026-08-25
+**Supersedes:** [ADR 0157](0157-public-ontology-namespace-identity.md)
+**Resolves:** [#372](https://github.com/ContextualWisdomLab/LineageWeave/issues/372)
+
+## Context
+
+ADR 0157 made the lowercase
+`https://contextualwisdomlab.github.io/lineageweave/ontology#` namespace
+canonical and demoted the repository-case
+`https://contextualwisdomlab.github.io/LineageWeave/ontology#` to a
+compatibility vocabulary. Its decision 8 required an owned route at the exact
+lowercase path before migration could complete. That owned lowercase route
+does not exist and is not planned: GitHub Pages serves this repository only at
+the project path `/LineageWeave/`, which matches the repository name, and an
+organization-site alias for a second case-distinct path would permanently
+split one publication into two hosting surfaces that must be kept in lockstep.
+
+The product owner has now directed the opposite resolution: the public
+ontology namespace must use the repository-case spelling `LineageWeave`, the
+same case GitHub Pages actually serves. This aligns the semantic identifier
+with (a) the dereferenceable documentation endpoint already published at
+`https://contextualwisdomlab.github.io/LineageWeave/ontology` ([ADR
+0159](0159-published-ontology-pages.md)), (b) the repository name every
+downstream consumer sees, and (c) the PROV-O support profile's historical
+IRIs. RDF treats the two spellings as different resources, so the flip is a
+real identifier change with real compatibility obligations -- it is not a
+cosmetic edit. Per ADR 0157's own terms, both forms are externally durable:
+stored `post_project_mention.ontology_iri` values may still carry the
+lowercase form, and downstream graphs may have copied either.
+
+The same slice completes the ontology's missing definitions: node attribute
+datatype properties, a SKOS post-type concept scheme grounded in the seeded
+`voc_type` controlled vocabulary, OWL disjointness and inverse constraints,
+and a SHACL shapes graph for closed-world data validation ([Knublauch &
+Kontokostas, 2017]). SHACL carries the cardinality and value-range checks
+OWL's open-world semantics deliberately does not, so DB-to-RDF projections
+fail loudly instead of silently polluting downstream graphs.
+
+## Decision
+
+1. The canonical namespace for all existing and future LineageWeave ontology
+   terms is the repository-case
+   `https://contextualwisdomlab.github.io/LineageWeave/ontology#`. New runtime
+   values, RDF exports, database rows, examples, API payloads, and generated
+   Pages artifacts mint only repository-case term IRIs.
+2. The lowercase namespace is now the deprecated compatibility namespace. It
+   remains dereferenceable through the published compatibility vocabulary and
+   is never reused for different meanings.
+3. The publication slice serves both namespace documents with `200 OK`. The
+   repository-case document is authoritative; the lowercase document identifies
+   it via `dcterms:isReplacedBy`, carries `owl:deprecated true`, and holds only
+   validated mappings. A redirect alone remains insufficient, per ADR 0157's
+   reasoning, which applies symmetrically.
+4. Compatibility mappings are generated between the two parsed graphs and
+   emitted only when local-name uniqueness, term kind, and defining semantics
+   match: class-to-class `owl:equivalentClass`; property-to-same-kind
+   `owl:equivalentProperty`; SKOS-concept-to-SKOS-concept `skos:exactMatch`
+   after meaning verification; individuals `owl:sameAs` only with identity
+   evidence. A term without sufficient evidence receives no equivalence
+   assertion. The publication validator enforces local-name equality and term
+   kinds fail-closed in both directions.
+5. Historical RDF, provenance bundles, and evidence rows are immutable.
+   `scripts/migrate_legacy_namespace.py` now rewrites stored lowercase IRIs to
+   the repository-case spelling -- dry-run by default, transactional,
+   idempotent, never touching provenance columns, refusing unknown third
+   spellings.
+6. Producers stop minting lowercase IRIs in this release. The lowercase
+   compatibility vocabulary stays marked deprecated for at least 180 days and
+   two minor releases, whichever is later; dereferenceability and mappings are
+   not removed at the end of that window.
+7. Node-attribute datatype properties are declared only for columns the
+   relational schema actually defines (`source_post.post_title`,
+   `post_body`, `created_at`, `updated_at`, `event_occurred_at`;
+   `cataloged_person.person_name`, `last_known_job_title`;
+   `corporate_entity.corporate_entity_code`, `entity_name`). No invented
+   column-backed property (country, business registration number) is minted.
+   Shared timestamp properties carry no `rdfs:domain` because two `rdfs:domain`
+   statements on one property entail subjects belong to both classes -- the
+   same multi-domain trap ADR 0004's edge design already avoids; per-class
+   cardinality lives in the SHACL shapes instead.
+8. The post-type classification is formalized as SKOS exactly where the
+   relational source has a governed vocabulary: the five seeded `voc_type`
+   codes (`voc`, `vocc`, `voco`, `vom`, `vop`) become concepts in a
+   `skos:ConceptScheme`. Keyman job titles and industry sectors remain free
+   text in the schema with no lookup category, so no scheme is invented for
+   them yet; that gap is tracked rather than fabricated.
+9. Logical integrity constraints are stated explicitly:
+   `:OurSidePerson owl:disjointWith :CounterpartyPerson` (a person side is one
+   or the other, per the seeded `person_side` vocabulary), and
+   `:hasAffiliate owl:inverseOf :affiliatedWith` so bidirectional person-to-
+   entity queries resolve without a second stored edge. The inverse carries no
+   relational lookup code, mirroring the existing `:mentions` /
+   `:mentionedIn` pair.
+10. A separate SHACL shapes graph validates projected data:
+    required post title/body/timestamps, a complete single-valued RDF
+    `subject`/`predicate`/`object` chain for every `ProjectMention`,
+    single-valued decimal confidence within `[0.0, 1.0]`, required names on
+    persons and entities, and the closed-world complement of the
+    our-side/counterparty disjointness. Publication copies
+    the shapes artifact beside the ontology and refuses dangling shape targets
+    outside the canonical namespace.
+
+## Considered options
+
+### Repository-case canonical — chosen
+
+Matches the only hosting path Pages actually serves, keeps one publication
+surface, honors the owner directive, and preserves the support profile's
+historical IRIs. Cost: stored lowercase IRIs migrate once through the existing
+transactional tooling, and the compatibility vocabulary flips direction.
+
+### Keep lowercase canonical (ADR 0157 status quo)
+
+Would require building and operating a second, organization-hosted lowercase
+route forever, splitting semantic identity from the served documentation path.
+Rejected by the owner directive and by deployment simplicity.
+
+### Treat both namespaces as canonical
+
+Rejected for the same reason ADR 0157 rejected it: RDF consumers correctly
+treat distinct IRIs as distinct resources; dual authorities preserve the
+interoperability defect.
+
+## Consequences
+
+- One canonical namespace aligned with the served Pages path; new producers
+  are unambiguous.
+- The lowercase compatibility vocabulary remains resolvable indefinitely;
+  existing serialized graphs keep resolving through validated mappings.
+- Stored-value migration runs through `scripts/migrate_legacy_namespace.py`
+  with its existing dry-run/refusal discipline, direction reversed.
+- Runtime constants, Turtle/JSON-LD/N-Triples, support profile, API and
+  frontend fixtures, database seeds' consumers, and the generated Pages
+  artifact move in one synchronized release.
+- SHACL validation becomes a first-class test gate over the source graph.
+
+## Verification
+
+- Exact `200` responses for both namespace documents and representative
+  fragments, with the repository-case document identified as canonical.
+- RDF graph-isomorphism and term-kind tests for every emitted mapping; no
+  duplicate local fragments across namespaces.
+- Consumer fixtures prove old lowercase graphs still resolve and new
+  serialization mints only repository-case IRIs.
+- Transactional migration tests prove idempotency, rollback safety, and
+  provenance-column preservation (direction-reversed).
+- SHACL conformance of the source ontology plus a negative violation test;
+  publication manifest lists the shapes artifact deterministically.
+
+## Related decisions
+
+- [ADR 0004](0004-knowledge-graph-ontology.md): ontology vocabulary authority.
+- [ADR 0011](0011-prov-o-standard-relations.md) /
+  [ADR 0065](0065-prov-o-provenance-boundary.md): PROV-O boundary.
+- [ADR 0157](0157-public-ontology-namespace-identity.md): superseded; its
+  compatibility-mapping mechanics are retained with direction reversed.
+- [ADR 0159](0159-published-ontology-pages.md): deterministic Pages
+  publication pipeline extended with the shapes artifact.
+- Issue #372 owns the completed implementation and verification.
+
+## References — APA 7th
+
+Knublauch, H., & Kontokostas, R. (Eds.). (2017). *SHACL: Shapes constraint
+language* (W3C Recommendation). World Wide Web Consortium.
+https://www.w3.org/TR/shacl/
+
+Miles, A., & Bechhofer, S. (Eds.). (2009). *SKOS simple knowledge organization
+system reference* (W3C Recommendation). World Wide Web Consortium.
+https://www.w3.org/TR/skos-reference/
+
+Sauermann, L., & Cyganiak, R. (2008). *Cool URIs for the Semantic Web* (W3C
+Interest Group Note). World Wide Web Consortium. https://www.w3.org/TR/cooluris/
+
+W3C OWL Working Group. (2012). *OWL 2 web ontology language quick reference
+guide* (2nd ed., W3C Recommendation). World Wide Web Consortium.
+https://www.w3.org/TR/owl2-quick-reference/
diff --git a/docs/adr/README.md b/docs/adr/README.md
index 6aca500f1..365a5d6c4 100644
--- a/docs/adr/README.md
+++ b/docs/adr/README.md
@@ -13,7 +13,7 @@ decision from them.
 | [`lineage-bi-research-notes.md`](../lineage-bi-research-notes.md) | [0084](0084-lineage-research-grounding.md), [0062](0062-semantic-unit-embedding.md), [0064](0064-lineage-evidence-and-tree-assembly.md), [0024](0024-rankweave-fusion-fail-closed.md), [0165](0165-quantity-script-display.md), [0167](0167-rankweave-ranking-channel-evidence.md), [0169](0169-ask-batched-lineage-graph.md), [0202](0202-ask-event-time-filter.md) |
 | [`PROV_O_IMPLEMENTATION.md`](../PROV_O_IMPLEMENTATION.md) | [0065](0065-prov-o-provenance-boundary.md) |
 | [`PROV_O_IMPLEMENTATION_MATRIX.md`](../PROV_O_IMPLEMENTATION_MATRIX.md) | [0065](0065-prov-o-provenance-boundary.md) |
-| [`ONTOLOGY_NAMESPACE_INVENTORY.md`](../doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md) | [0157](0157-public-ontology-namespace-identity.md) |
+| [`ONTOLOGY_NAMESPACE_INVENTORY.md`](../doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md) | [0207](0207-repository-case-ontology-namespace-canonical.md), [0157](0157-public-ontology-namespace-identity.md) |
 | [`image-content-schema.md`](../image-content-schema.md) | [0066](0066-position-preserving-image-content.md) |
 | [`storybook-inventory.md`](../storybook-inventory.md) | [0118](0118-uiux-standard-guide-v3-design-overhaul.md), [0184](0184-ontology-provenance-explorer.md) |
 | [`POSTGRESQL_CONCURRENCY_REFERENCES.md`](../doctoring/POSTGRESQL_CONCURRENCY_REFERENCES.md) | [0204](0204-analysis-run-short-transaction-delivery.md) |
diff --git a/docs/doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md b/docs/doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md
index e797324cf..c0ee3eae6 100644
--- a/docs/doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md
+++ b/docs/doctoring/ONTOLOGY_NAMESPACE_INVENTORY.md
@@ -81,3 +81,18 @@ decision uses ADR 0157. PR #485 now owns ADR `0158` at exact head
 file uses `0159`, so the publication decision in this stack uses ADR 0159.
 Recheck immediately before integration; neither number is a global allocator
 reservation.
+
+## Resolution (ADR 0207, 2026-08-25)
+
+The product owner directed the opposite canonicalization: the
+repository-case namespace
+`https://contextualwisdomlab.github.io/LineageWeave/ontology#` is now
+canonical ([ADR 0207](../adr/0207-repository-case-ontology-namespace-canonical.md),
+superseding [ADR 0157](../adr/0157-public-ontology-namespace-identity.md),
+resolving issue #372). The lowercase form is a deprecated compatibility
+vocabulary; both documents stay dereferenceable through the published
+site with validated term-kind mappings, and stored values migrate via
+`scripts/migrate_legacy_namespace.py` with its dry-run/refusal
+discipline (direction reversed: lowercase rows rewrite to
+repository-case). The inventory above remains the historical evidence
+for why both forms were treated as externally durable.
diff --git a/docs/ontology/lineageweave-kg-shapes.ttl b/docs/ontology/lineageweave-kg-shapes.ttl
new file mode 100644
index 000000000..436eb401f
--- /dev/null
+++ b/docs/ontology/lineageweave-kg-shapes.ttl
@@ -0,0 +1,185 @@
+@prefix : <https://contextualwisdomlab.github.io/LineageWeave/ontology#> .
+@prefix dcterms: <http://purl.org/dc/terms/> .
+@prefix owl: <http://www.w3.org/2002/07/owl#> .
+@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+@prefix sh: <http://www.w3.org/ns/shacl#> .
+@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
+
+#################################################################
+# LineageWeave Knowledge Graph SHACL shapes
+#
+# Closed-world data validation over the OWL vocabulary above. OWL's
+# open-world semantics infers; it does not verify that projected data
+# arrived complete and in range (Knublauch & Kontokostas, 2017). These
+# shapes carry exactly that verification for DB-to-RDF projections:
+#
+# - required post title/body/creation timestamp;
+# - single-valued project-mention evidence with confidence bounded to
+#   [0.0, 1.0] inclusive;
+# - required person and entity names, optional bounded job title;
+# - the closed-world complement of :OurSidePerson
+#   owl:disjointWith :CounterpartyPerson.
+#
+# Every sh:targetClass must live in the canonical repository-case namespace;
+# sh:path may additionally use RDF's subject/predicate/object reification
+# predicates. scripts/publish_ontology_site.py fails closed on every other
+# external or dangling target so a renamed term cannot silently orphan its
+# shape. tests/test_ontology_shapes.py validates this graph against the
+# ontology source with pyshacl, plus negative violation tests.
+#################################################################
+
+<https://contextualwisdomlab.github.io/LineageWeave/ontology/lineageweave-kg-shapes.ttl>
+    a owl:Ontology ;
+    dcterms:title "LineageWeave Knowledge Graph SHACL shapes"@en ;
+    dcterms:description "Closed-world validation shapes over the LineageWeave knowledge-graph ontology: required attributes, confidence bounds, and side disjointness."@en ;
+    owl:imports <https://contextualwisdomlab.github.io/LineageWeave/ontology> ;
+    owl:versionInfo "1.0.0" .
+
+:PostShape a sh:NodeShape ;
+    rdfs:label "Post shape" ;
+    sh:targetClass :Post ;
+    sh:property [
+        sh:path :postTitle ;
+        sh:name "post title" ;
+        sh:description "Every post projects a non-empty source_post.post_title." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+        sh:minLength 1 ;
+    ] ;
+    sh:property [
+        sh:path :postBody ;
+        sh:name "post body" ;
+        sh:description "The preserved source representation is never absent." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+        sh:minLength 1 ;
+    ] ;
+    sh:property [
+        sh:path :createdAt ;
+        sh:name "created at" ;
+        sh:description "A post carries at least one record-creation instant; Global Ask falls back to it only when event_occurred_at is missing (ADR 0150)." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:dateTime ;
+    ] ;
+    sh:property [
+        sh:path :updatedAt ;
+        sh:name "updated at" ;
+        sh:description "Optional last-write instant; importers fall back to created_at when null." ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:dateTime ;
+    ] ;
+    sh:property [
+        sh:path :eventOccurredAt ;
+        sh:name "event occurred at" ;
+        sh:description "Optional business-event instant bound by ADR 0150/0202 time filters." ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:dateTime ;
+    ] .
+
+:PersonShape a sh:NodeShape ;
+    rdfs:label "Person shape" ;
+    sh:targetClass :Person ;
+    sh:property [
+        sh:path :personName ;
+        sh:name "person name" ;
+        sh:description "cataloged_person.person_name is not null." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+        sh:minLength 1 ;
+    ] ;
+    sh:property [
+        sh:path :lastKnownJobTitle ;
+        sh:name "last known job title" ;
+        sh:description "Nullable disambiguation signal; at most one." ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+    ] .
+
+:CorporateEntityShape a sh:NodeShape ;
+    rdfs:label "Corporate entity shape" ;
+    sh:targetClass :CorporateEntity ;
+    sh:property [
+        sh:path :entityName ;
+        sh:name "entity name" ;
+        sh:description "The human-readable hierarchy label is not null." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+        sh:minLength 1 ;
+    ] ;
+    sh:property [
+        sh:path :entityCode ;
+        sh:name "entity code" ;
+        sh:description "The login corp code is unique and not null." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+        sh:minLength 1 ;
+    ] .
+
+:ProjectMentionShape a sh:NodeShape ;
+    rdfs:label "Project mention shape" ;
+    sh:targetClass :ProjectMention ;
+    sh:property [
+        sh:path rdf:subject ;
+        sh:name "mentioned by post" ;
+        sh:description "Every reified project mention identifies exactly one source post." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:class :Post ;
+    ] ;
+    sh:property [
+        sh:path rdf:predicate ;
+        sh:name "project mention predicate" ;
+        sh:description "The reified statement is specifically a :mentionsProject assertion." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:hasValue :mentionsProject ;
+    ] ;
+    sh:property [
+        sh:path rdf:object ;
+        sh:name "mentioned project" ;
+        sh:description "Every reified project mention identifies exactly one project." ;
+        sh:minCount 1 ;
+        sh:maxCount 1 ;
+        sh:class :Project ;
+    ] ;
+    sh:property [
+        sh:path :semanticConfidence ;
+        sh:name "semantic confidence" ;
+        sh:description "Extraction confidence stays inside [0.0, 1.0] inclusive." ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:decimal ;
+        sh:minInclusive 0.0 ;
+        sh:maxInclusive 1.0 ;
+    ] ;
+    sh:property [
+        sh:path :projectEvidence ;
+        sh:name "project evidence" ;
+        sh:description "At most one verbatim evidence span per mention; missing evidence is an honest unknown, never zero-filled." ;
+        sh:maxCount 1 ;
+        sh:datatype xsd:string ;
+    ] .
+
+:OurSidePersonShape a sh:NodeShape ;
+    rdfs:label "Our-side person shape" ;
+    sh:comment "Closed-world complement of :OurSidePerson owl:disjointWith :CounterpartyPerson: an instance of one can never be typed as the other." ;
+    sh:targetClass :OurSidePerson ;
+    sh:not [
+        a sh:NodeShape ;
+        sh:class :CounterpartyPerson ;
+    ] .
+
+:CounterpartyPersonShape a sh:NodeShape ;
+    rdfs:label "Counterparty person shape" ;
+    sh:comment "Mirror direction of the disjointness complement." ;
+    sh:targetClass :CounterpartyPerson ;
+    sh:not [
+        a sh:NodeShape ;
+        sh:class :OurSidePerson ;
+    ] .
diff --git a/docs/ontology/lineageweave-kg.ttl b/docs/ontology/lineageweave-kg.ttl
index c945b98f7..24aeabdba 100644
--- a/docs/ontology/lineageweave-kg.ttl
+++ b/docs/ontology/lineageweave-kg.ttl
@@ -1,4 +1,4 @@
-@prefix : <https://contextualwisdomlab.github.io/lineageweave/ontology#> .
+@prefix : <https://contextualwisdomlab.github.io/LineageWeave/ontology#> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@@ -13,27 +13,38 @@
 # The formal OWL 2 Full / RDFS / SKOS vocabulary for the
 # `knowledge_graph_edge` table's node/edge types, the
 # `entity_relationship_type` / `person_side` / `corporate_entity_level`
-# controlled vocabularies in migrations/0001_initial_schema.sql, and
+# / `voc_type` controlled vocabularies in migrations/, and
 # `post_summary_role.actor_type_code` (migrations/0012).
 #
+# ADR 0207 supersedes ADR 0157: the canonical namespace is the
+# repository-case spelling above -- the exact path GitHub Pages serves.
+# The lowercase namespace is a deprecated compatibility vocabulary
+# published beside this file as namespace-compatibility.ttl with
+# validated term-kind mappings; new producers must not mint lowercase
+# IRIs.
+#
 # `knowledge_graph_edge` (source_node_type_code, source_node_id) --
 # [edge_type_code] --> (target_node_type_code, target_node_id) is
 # already an RDF triple in shape (Cyganiak, Wood, & Lanthaler, 2014);
 # this file is the formal semantic layer over it -- PostgreSQL stays
 # the source of record. See docs/adr/0004-knowledge-graph-ontology.md
-# for the KG design rationale, docs/adr/0006-role-responsibility-agent-ontology.md
-# for the R&R actor-type rationale (grounded in W3C PROV-O), and
-# tests/test_ontology.py for the round-trip check that every code below
-# actually exists as a common_lookup_value row, and vice versa.
+# for the KG design rationale, docs/adr/0207-repository-case-ontology-namespace-canonical.md
+# for the namespace decision and SHACL boundary, and tests/test_ontology.py
+# for the round-trip check that every lookup code below actually exists
+# as a common_lookup_value row, and vice versa.
 #
-# Every custom term carries a :lookupCode annotation naming the exact
-# `common_lookup_value.lookup_code` it corresponds to -- that literal
-# string, not the IRI fragment, is what the relational schema stores.
+# Every controlled-vocabulary term carries a :lookupCode annotation
+# naming the exact `common_lookup_value.lookup_code` it corresponds to
+# -- that literal string, not the IRI fragment, is what the relational
+# schema stores. Column-projection datatype properties deliberately do
+# NOT carry :lookupCode: they project table columns, not governed
+# lookup rows, so there is nothing for the round-trip check to enforce
+# (the same discipline as the organization_name_resolution block below).
 #################################################################
 
-<https://contextualwisdomlab.github.io/lineageweave/ontology> a owl:Ontology ;
+<https://contextualwisdomlab.github.io/LineageWeave/ontology> a owl:Ontology ;
     rdfs:label "LineageWeave Knowledge Graph Ontology" ;
-    rdfs:comment "Formal OWL 2 Full / RDFS / SKOS vocabulary for LineageWeave's knowledge_graph_edge node and edge types, entity_relationship_type, person_side, corporate_entity_level, and post_summary_role.actor_type_code controlled vocabularies. RDF reification for semantic project evidence is interpreted with OWL 2 RDF-Based Semantics rather than OWL 2 DL." .
+    rdfs:comment "Formal OWL 2 Full / RDFS / SKOS vocabulary for LineageWeave's knowledge_graph_edge node and edge types, entity_relationship_type, person_side, corporate_entity_level, voc_type, and post_summary_role.actor_type_code controlled vocabularies. RDF reification for semantic project evidence is interpreted with OWL 2 RDF-Based Semantics rather than OWL 2 DL." .
 
 :lookupCode a owl:AnnotationProperty ;
     rdfs:label "lookup code" ;
@@ -45,7 +56,7 @@
 
 :Post a owl:Class ;
     rdfs:label "Post" ;
-    rdfs:comment "A source_post row: one VOC/VOM/VOP/VOCC/VOCO/VOS record." ;
+    rdfs:comment "A source_post row: one record typed by the voc_type scheme (:postTypeScheme) -- Voice of Customer, Customer's Customer, Competitor, Market, or Partner." ;
     :lookupCode "node_post" .
 
 :Person a owl:Class ;
@@ -63,6 +74,12 @@
     rdfs:label "Counterparty person" ;
     :lookupCode "counterparty" .
 
+# A person side is exactly one of our-side or counterparty (the seeded
+# person_side vocabulary has no third value), so the two subclasses are
+# declared disjoint: a reasoner must never infer both from one row, and
+# the SHACL shapes graph carries the closed-world complement.
+:OurSidePerson owl:disjointWith :CounterpartyPerson .
+
 :CorporateEntity a owl:Class ;
     rdfs:subClassOf skos:Concept ;
     rdfs:label "Corporate entity" ;
@@ -101,6 +118,16 @@
     rdfs:comment "A person's N:N organizational affiliation (person_affiliation)." ;
     :lookupCode "edge_affiliation" .
 
+# Bidirectional query support for affiliations: consumers can traverse
+# entity -> people without a second stored edge. Like :mentions above,
+# the inverse stays un-coded so one lookup_code keeps naming exactly one
+# stored property.
+:hasAffiliate a owl:ObjectProperty ;
+    rdfs:domain :CorporateEntity ;
+    rdfs:range :Person ;
+    rdfs:label "has affiliate" ;
+    owl:inverseOf :affiliatedWith .
+
 :coMentionedWith a owl:ObjectProperty, owl:SymmetricProperty ;
     rdfs:domain :Person ;
     rdfs:range :Person ;
@@ -173,6 +200,123 @@
     rdfs:label "has Voice-of-Supplier relationship" ;
     :lookupCode "rel_vos" .
 
+#################################################################
+# Datatype properties -- node attribute projections.
+#
+# These project real source columns (source_post.post_title /
+# post_body / created_at / updated_at / event_occurred_at;
+# cataloged_person.person_name / last_known_job_title;
+# corporate_entity.corporate_entity_code / entity_name). No property
+# is minted for a column that does not exist. Shared timestamps carry
+# NO rdfs:domain on purpose: two rdfs:domain statements would entail
+# every subject belongs to BOTH classes -- the multi-domain trap the
+# cross-post edge block above already avoids. Per-class cardinality
+# and datatype constraints live in the SHACL shapes graph
+# (lineageweave-kg-shapes.ttl), which validates projected data
+# closed-world where OWL's open world deliberately will not
+# (Knublauch & Kontokostas, 2017).
+#################################################################
+
+:postTitle a owl:DatatypeProperty ;
+    rdfs:domain :Post ;
+    rdfs:range xsd:string ;
+    rdfs:label "post title" ;
+    rdfs:comment "source_post.post_title -- the authoring application's title text." .
+
+:postBody a owl:DatatypeProperty ;
+    rdfs:domain :Post ;
+    rdfs:range xsd:string ;
+    rdfs:label "post body" ;
+    rdfs:comment "source_post.post_body -- the preserved source representation, never flattened into one opaque string by derived views." .
+
+:eventOccurredAt a owl:DatatypeProperty ;
+    rdfs:domain :Post ;
+    rdfs:range xsd:dateTime ;
+    rdfs:label "event occurred at" ;
+    rdfs:comment "source_post.event_occurred_at (migrations 0183) -- the business event instant Global Ask time filters bind to, falling back to created_at only when missing (ADR 0150)." .
+
+:personName a owl:DatatypeProperty ;
+    rdfs:domain :Person ;
+    rdfs:range xsd:string ;
+    rdfs:label "person name" ;
+    rdfs:comment "cataloged_person.person_name -- Keyman extraction tests the raw organization name before any abbreviation rewrite so a rewrite cannot turn an existing tie into an apparent creation miss (ADR 0026)." .
+
+:lastKnownJobTitle a owl:DatatypeProperty ;
+    rdfs:domain :Person ;
+    rdfs:range xsd:string ;
+    rdfs:label "last known job title" ;
+    rdfs:comment "cataloged_person.last_known_job_title (migrations 0013) -- a stated title is real same-name disambiguation evidence even when no affiliation row exists." .
+
+:entityName a owl:DatatypeProperty ;
+    rdfs:domain :CorporateEntity ;
+    rdfs:range xsd:string ;
+    rdfs:label "entity name" ;
+    rdfs:comment "corporate_entity.entity_name -- the human-readable hierarchy label; corporate similarity results stay unique/miss/tie over this name (ADR 0026)." .
+
+:entityCode a owl:DatatypeProperty ;
+    rdfs:domain :CorporateEntity ;
+    rdfs:range xsd:string ;
+    rdfs:label "entity code" ;
+    rdfs:comment "corporate_entity.corporate_entity_code -- the short corp code carried at login time, distinct from the display name." .
+
+# Shared record timestamps apply to every KG node kind, so they declare
+# no domain (see the block comment above); the shapes graph pins them
+# per class.
+:createdAt a owl:DatatypeProperty ;
+    rdfs:range xsd:dateTime ;
+    rdfs:label "created at" ;
+    rdfs:comment "Record creation instant shared across node kinds (each source table's created_at); no rdfs:domain because multiple domains would entail impossible co-membership." .
+
+:updatedAt a owl:DatatypeProperty ;
+    rdfs:range xsd:dateTime ;
+    rdfs:label "updated at" ;
+    rdfs:comment "Record last-write instant shared across node kinds (e.g. source_post.updated_at); null updated-at falls back to created_at at import boundaries." .
+
+#################################################################
+# SKOS -- voc_type (post type classification)
+#
+# The five-value VOC source vocabulary migrations/0042 governs. There
+# are exactly five seeded codes: vos exists only as a relationship type
+# (rel_vos above), never as a post type, so no Voice-of-Supplier concept
+# belongs here. Adding "voc_type" to the ontology-covered categories
+# puts these codes under tests/test_ontology.py's round-trip check --
+# closing the previously documented expected gap.
+#################################################################
+
+:postTypeScheme a skos:ConceptScheme ;
+    rdfs:label "Post type scheme" ;
+    rdfs:comment "Voice-based classification of what a source post records, per the governed five-value voc_type lookup category (migrations/0042)." .
+
+:voiceOfCustomerType a skos:Concept ;
+    skos:inScheme :postTypeScheme ;
+    skos:prefLabel "Voice of Customer"@en ;
+    rdfs:comment "A customer's own voice about their experience." ;
+    :lookupCode "voc" .
+
+:voiceOfCustomersCustomerType a skos:Concept ;
+    skos:inScheme :postTypeScheme ;
+    skos:prefLabel "Voice of Customer's Customer"@en ;
+    rdfs:comment "The voice of the customer's downstream customer." ;
+    :lookupCode "vocc" .
+
+:voiceOfCompetitorType a skos:Concept ;
+    skos:inScheme :postTypeScheme ;
+    skos:prefLabel "Voice of Competitor"@en ;
+    rdfs:comment "Market intelligence sourced from a competitor." ;
+    :lookupCode "voco" .
+
+:voiceOfMarketType a skos:Concept ;
+    skos:inScheme :postTypeScheme ;
+    skos:prefLabel "Voice of Market"@en ;
+    rdfs:comment "General market signal not attributable to one account or partner." ;
+    :lookupCode "vom" .
+
+:voiceOfPartnerType a skos:Concept ;
+    skos:inScheme :postTypeScheme ;
+    skos:prefLabel "Voice of Partner"@en ;
+    rdfs:comment "A partner organization's voice." ;
+    :lookupCode "vop" .
+
 #################################################################
 # SKOS -- corporate_entity_level (Group -> Company -> Plant)
 #################################################################
@@ -222,6 +366,11 @@
 # (Reynolds, 2014) does: org:OrganizationalUnit, "used to represent
 # division of a particular organization into sub-organizational units,"
 # linked to its parent via org:unitOf. See docs/adr/0007-team-actor-type.md.
+#
+# Keyman job titles and industry sectors remain free-text columns with
+# no governed lookup category, so no SKOS scheme is invented for them
+# here (ADR 0207 decision 8 tracks that gap rather than fabricating
+# vocabulary).
 #################################################################
 
 :RoleActorPerson a owl:Class ;
diff --git a/docs/ontology/namespace-compatibility.ttl b/docs/ontology/namespace-compatibility.ttl
index 95804cd4e..234e0f36e 100644
--- a/docs/ontology/namespace-compatibility.ttl
+++ b/docs/ontology/namespace-compatibility.ttl
@@ -1,13 +1,19 @@
-@prefix canonical: <https://contextualwisdomlab.github.io/lineageweave/ontology#> .
+@prefix canonical: <https://contextualwisdomlab.github.io/LineageWeave/ontology#> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
-@prefix legacy: <https://contextualwisdomlab.github.io/LineageWeave/ontology#> .
+@prefix legacy: <https://contextualwisdomlab.github.io/lineageweave/ontology#> .
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
-<https://contextualwisdomlab.github.io/LineageWeave/ontology>
+# ADR 0207 supersedes ADR 0157: the repository-case namespace above is
+# canonical and the lowercase namespace below is the deprecated
+# compatibility vocabulary. Both documents stay dereferenceable with
+# validated mappings; scripts/publish_ontology_site.py verifies local-
+# name equality and RDF term kind fail-closed before publication.
+
+<https://contextualwisdomlab.github.io/lineageweave/ontology>
     a owl:Ontology ;
     owl:deprecated "true"^^xsd:boolean ;
-    dcterms:isReplacedBy <https://contextualwisdomlab.github.io/lineageweave/ontology> .
+    dcterms:isReplacedBy <https://contextualwisdomlab.github.io/LineageWeave/ontology> .
 
 legacy:Post a owl:Class .
 legacy:Person a owl:Class .
diff --git a/docs/ontology/prov-o-support-profile.ttl b/docs/ontology/prov-o-support-profile.ttl
index 6a7ec12a3..1c277afec 100644
--- a/docs/ontology/prov-o-support-profile.ttl
+++ b/docs/ontology/prov-o-support-profile.ttl
@@ -1,16 +1,16 @@
-@prefix : <https://contextualwisdomlab.github.io/lineageweave/ontology#> .
+@prefix : <https://contextualwisdomlab.github.io/LineageWeave/ontology#> .
 @prefix dcterms: <http://purl.org/dc/terms/> .
 @prefix org: <http://www.w3.org/ns/org#> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 @prefix prov: <http://www.w3.org/ns/prov#> .
 @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
 
-<https://contextualwisdomlab.github.io/lineageweave/ontology/prov-o-support-profile.ttl>
+<https://contextualwisdomlab.github.io/LineageWeave/ontology/prov-o-support-profile.ttl>
     a owl:Ontology ;
     dcterms:title "LineageWeave PROV-O support profile"@en ;
     dcterms:conformsTo <http://www.w3.org/TR/2013/REC-prov-o-20130430/> ;
     owl:imports <http://www.w3.org/ns/prov-o#>,
-        <https://contextualwisdomlab.github.io/lineageweave/ontology/namespace-compatibility.ttl> ;
+        <https://contextualwisdomlab.github.io/LineageWeave/ontology/namespace-compatibility.ttl> ;
     rdfs:comment "The runtime supports all 30 PROV-O classes, all 50 normative properties, both qualification tables, and Appendix B inverse names without redefining the W3C vocabulary."@en .
 
 :Post rdfs:subClassOf prov:Entity .
diff --git a/frontend/src/App.css b/frontend/src/App.css
index d2ff10630..fbe394ffd 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -1062,7 +1062,9 @@
 
 .ontology-node text {
   fill: var(--color-text-heading);
-  stroke: none;
+  stroke: var(--color-background);
+  stroke-width: 4px;
+  paint-order: stroke;
   font-size: 0.8rem;
 }
 
diff --git a/frontend/src/App.test.tsx b/frontend/src/App.test.tsx
index 1fb7233fd..fe1ca6186 100644
--- a/frontend/src/App.test.tsx
+++ b/frontend/src/App.test.tsx
@@ -1177,7 +1177,7 @@ describe("App, authenticated", () => {
                 project_name: "Semantic project",
                 evidence: "project was described in the body",
                 confidence: 0.9,
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Project",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Project",
                 ontology_label: "Project",
                 extraction_method: "contextual_orchestrator_semantic",
                 resolution_status: "semantic_candidate",
@@ -1304,7 +1304,7 @@ describe("App, authenticated", () => {
                 project_name: "Sample project",
                 evidence: "post body",
                 confidence: 0.9,
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Project",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Project",
                 extraction_method: "contextual_orchestrator_semantic",
               },
             ],
@@ -1372,7 +1372,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "person-ada",
                 node_type_code: "node_person",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Person",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Person",
                 ontology_label: "Person",
                 label: "Ada West",
                 person_side_code: "our_side",
@@ -1409,7 +1409,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "person-priya",
                 node_type_code: "node_person",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Person",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Person",
                 ontology_label: "Person",
                 label: "Priya Nair",
                 person_side_code: "counterparty",
@@ -1419,7 +1419,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "post-2",
                 node_type_code: "node_post",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Post",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Post",
                 ontology_label: "Post",
                 label: "Linked post",
                 relevance: 0.3,
@@ -1427,7 +1427,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "corp-1",
                 node_type_code: "node_corporate_entity",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Organization",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Organization",
                 ontology_label: "Organization",
                 label: "Demo Corp",
                 relevance: 0.2,
@@ -1436,7 +1436,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "team-1",
                 node_type_code: "node_team",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Team",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Team",
                 ontology_label: "Team",
                 label: "설계팀",
                 relevance: 0.15,
@@ -1454,7 +1454,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "post-2",
                 node_type_code: "node_post",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Post",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Post",
                 ontology_label: "Post",
                 label: "Linked post",
                 relevance: 0.6,
@@ -1475,7 +1475,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "post-1",
                 node_type_code: "node_post",
-                ontology_class_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Post",
+                ontology_class_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Post",
                 display_label: "Public post",
                 truth_status_code: "truth_observed",
                 valid_from: null,
@@ -1500,7 +1500,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "person-ada",
                 node_type_code: "node_person",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Person",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Person",
                 ontology_label: "Person",
                 label: "Ada West",
                 person_side_code: "our_side",
@@ -1520,7 +1520,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "person-ada",
                 node_type_code: "node_person",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Person",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Person",
                 ontology_label: "Person",
                 label: "Ada West",
                 person_side_code: "our_side",
@@ -1530,7 +1530,7 @@ describe("App, authenticated", () => {
               {
                 node_id: "post-1",
                 node_type_code: "node_post",
-                ontology_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Post",
+                ontology_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Post",
                 ontology_label: "Post",
                 label: "Linked post",
                 relevance: 0.6,
@@ -2427,7 +2427,7 @@ describe("App, authenticated", () => {
     expect(screen.getByText(/Extraction source: Semantic extraction/)).toBeInTheDocument();
     expect(screen.getByText(/Evidence field: Stored semantic evidence/)).toBeInTheDocument();
     expect(screen.queryByText("contextual_orchestrator_semantic")).not.toBeInTheDocument();
-    expect(screen.queryByText("https://contextualwisdomlab.github.io/lineageweave/ontology#Project")).not.toBeInTheDocument();
+    expect(screen.queryByText("https://contextualwisdomlab.github.io/LineageWeave/ontology#Project")).not.toBeInTheDocument();
     expect(screen.getByText("첫 번째 이벤트")).toBeInTheDocument();
     expect(screen.getByText(/우리 측 후속/)).toBeInTheDocument();
     expect(screen.getByRole("button", { name: "R&R Keyman: Ada West" })).toBeInTheDocument();
diff --git a/frontend/src/components/OntologyExplorer.stories.tsx b/frontend/src/components/OntologyExplorer.stories.tsx
index d05861166..52e521bfb 100644
--- a/frontend/src/components/OntologyExplorer.stories.tsx
+++ b/frontend/src/components/OntologyExplorer.stories.tsx
@@ -16,7 +16,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
     {
       node_id: POST_ID,
       node_type_code: "node_post",
-      ontology_class_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Post",
+      ontology_class_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Post",
       display_label: "Demo public post",
       truth_status_code: "truth_observed",
       valid_from: null,
@@ -28,7 +28,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
     {
       node_id: PERSON_ID,
       node_type_code: "node_person",
-      ontology_class_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#Person",
+      ontology_class_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#Person",
       display_label: "Test Person",
       truth_status_code: "truth_observed",
       valid_from: null,
@@ -40,7 +40,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
     {
       node_id: CORP_ID,
       node_type_code: "node_corporate_entity",
-      ontology_class_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#CorporateEntity",
+      ontology_class_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#CorporateEntity",
       display_label: "Demo Corp",
       truth_status_code: "truth_observed",
       valid_from: null,
@@ -58,7 +58,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
       target_node_type_code: "node_person",
       target_node_id: PERSON_ID,
       property_code: "mentions",
-      ontology_property_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#mentions",
+      ontology_property_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#mentions",
       property_label: "mentions",
       truth_status_code: "truth_observed",
       valid_from: null,
@@ -74,7 +74,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
       target_node_type_code: "node_corporate_entity",
       target_node_id: CORP_ID,
       property_code: "affiliatedWith",
-      ontology_property_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#affiliatedWith",
+      ontology_property_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#affiliatedWith",
       property_label: "affiliated with",
       truth_status_code: "truth_observed",
       valid_from: null,
@@ -92,7 +92,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
       source_type_code: "node_post",
       property_code: "mentions",
       property_label: "mentions",
-      ontology_property_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#mentions",
+      ontology_property_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#mentions",
       target_node_id: PERSON_ID,
       target_label: "Test Person",
       target_type_code: "node_person",
@@ -109,7 +109,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
       source_type_code: "node_person",
       property_code: "affiliatedWith",
       property_label: "affiliated with",
-      ontology_property_iri: "https://contextualwisdomlab.github.io/lineageweave/ontology#affiliatedWith",
+      ontology_property_iri: "https://contextualwisdomlab.github.io/LineageWeave/ontology#affiliatedWith",
       target_node_id: CORP_ID,
       target_label: "Demo Corp",
       target_type_code: "node_corporate_entity",
@@ -121,7 +121,7 @@ const demoNeighborhood: OntologyNeighborhoodPayload = {
     },
   ],
   jsonld: {
-    "@context": { lw: "https://contextualwisdomlab.github.io/lineageweave/ontology#" },
+    "@context": { lw: "https://contextualwisdomlab.github.io/LineageWeave/ontology#" },
     "@graph": [],
   },
 };
diff --git a/frontend/src/components/OntologyExplorer.tsx b/frontend/src/components/OntologyExplorer.tsx
index 493da1a45..9b5f9af7a 100644
--- a/frontend/src/components/OntologyExplorer.tsx
+++ b/frontend/src/components/OntologyExplorer.tsx
@@ -386,7 +386,7 @@ function OntologyGraph({
             <text
               className="ontology-edge-label"
               x={midX}
-              y={midY - 6}
+              y={midY - 18}
               textAnchor="middle"
             >
               {edge.property_label} · {t(TRUTH_LABEL[edge.truth_status_code] ?? edge.truth_status_code)}
diff --git a/frontend/src/components/WorkspaceCalendar.tsx b/frontend/src/components/WorkspaceCalendar.tsx
index 5f2631f39..0b37ae2dc 100644
--- a/frontend/src/components/WorkspaceCalendar.tsx
+++ b/frontend/src/components/WorkspaceCalendar.tsx
@@ -33,7 +33,7 @@ export function WorkspaceCalendar({
       <section className="popup-section" aria-labelledby={`${headingId}-observed`}>
         <h3 id={`${headingId}-observed`}>{t("Observed calendar events")}</h3>
         {events.length === 0 ? (
-          <p className="popup-placeholder" role="status">
+          <p className="popup-placeholder">
             {naruonAvailable
               ? t("No observed calendar events are available.")
               : failClosedCopy}
diff --git a/lineageweave/ontology.py b/lineageweave/ontology.py
index f7edf76e6..5d0b3d508 100644
--- a/lineageweave/ontology.py
+++ b/lineageweave/ontology.py
@@ -25,8 +25,11 @@
 from rdflib.term import Identifier
 
 #: The ontology's own namespace -- every class/property IRI below is
-#: this prefix plus the term's local name (e.g. LW.Post).
-LW = Namespace("https://contextualwisdomlab.github.io/lineageweave/ontology#")
+#: this prefix plus the term's local name (e.g. LW.Post). ADR 0207 made
+#: the repository-case spelling canonical (it is the exact path GitHub
+#: Pages serves) and demoted the lowercase form to a deprecated
+#: compatibility vocabulary.
+LW = Namespace("https://contextualwisdomlab.github.io/LineageWeave/ontology#")
 
 #: The custom annotation property linking an ontology term to the exact
 #: `common_lookup_value.lookup_code` string it corresponds to.
diff --git a/pyproject.toml b/pyproject.toml
index 5800482d8..e3b7a5b18 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "lineageweave"
-version = "2.17.0"
+version = "2.18.0"
 description = "Reconstructs git-branch-style lineage DAGs from scattered short records using multi-channel score fusion and LLM adjudication."
 readme = "README.md"
 license = { text = "MIT" }
@@ -38,6 +38,10 @@ dev = [
   "pyjwt[crypto]>=2.8.0",
   "pytest>=8.0",
   "httpx>=0.27.0",
+  # Closed-world SHACL validation of docs/ontology/lineageweave-kg.ttl
+  # against lineageweave-kg-shapes.ttl (ADR 0207 decision 10). Pure
+  # Python; OWL-RL reasoning included.
+  "pyshacl>=0.26.0",
 ]
 backend = [
   "fastapi>=0.115.0",
diff --git a/scripts/build_ontology_site.py b/scripts/build_ontology_site.py
index f749ba3c4..62eab1a7c 100644
--- a/scripts/build_ontology_site.py
+++ b/scripts/build_ontology_site.py
@@ -28,6 +28,13 @@
 
 PUBLIC_BASE_URL = "https://contextualwisdomlab.github.io/LineageWeave"
 DOCUMENTATION_URL = f"{PUBLIC_BASE_URL}/ontology"
+#: ADR 0207: the canonical namespace is the repository-case spelling --
+#: the exact project path GitHub Pages serves. The lowercase form is a
+#: deprecated compatibility vocabulary published beside the ontology.
+CANONICAL_LOOKUP_PREDICATE = (
+    "https://contextualwisdomlab.github.io/LineageWeave/ontology#lookupCode"
+)
+SHAPES_RELATIVE_PATH = Path("docs/ontology/lineageweave-kg-shapes.ttl")
 CANONICAL_LINK_SUPPRESSION = (
     "<!-- nosemgrep: html.security.audit.missing-integrity.missing-integrity "
     "-- canonical metadata fetches no subresource -->"
@@ -156,9 +163,7 @@ def _render_term(graph: Graph, subject: URIRef, ontology_subjects: set[URIRef])
         or raw_fragment
     )
     comment = _preferred_literal(graph, subject, RDFS.comment)
-    lookup_predicate = URIRef(
-        "https://contextualwisdomlab.github.io/lineageweave/ontology#lookupCode"
-    )
+    lookup_predicate = URIRef(CANONICAL_LOOKUP_PREDICATE)
     lookup_codes = sorted(str(value) for value in graph.objects(subject, lookup_predicate))
     type_values = sorted(
         (value for value in graph.objects(subject, RDF.type) if isinstance(value, URIRef)),
@@ -352,6 +357,7 @@ def _render_ontology_page(graph: Graph, source_sha256: str) -> tuple[str, int]:
         '<a href="ontology.nt" type="application/n-triples">N-Triples <small>generated equivalent</small></a>'
         '<a href="prov-o-support-profile.ttl" type="text/turtle">PROV-O support profile</a>'
         '<a href="namespace-compatibility.ttl" type="text/turtle">Deprecated namespace compatibility</a>'
+        '<a href="lineageweave-kg-shapes.ttl" type="text/turtle">SHACL shapes</a>'
         '<a href="manifest.json" type="application/json">Build manifest</a>'
         "</div></section>"
         '<section class="summary-grid" aria-label="Ontology publication summary">'
@@ -359,7 +365,7 @@ def _render_ontology_page(graph: Graph, source_sha256: str) -> tuple[str, int]:
         f'<div class="summary-card"><strong>{len(graph)}</strong><br>RDF triples</div>'
         f'<div class="summary-card"><strong><code>{html.escape(source_sha256[:12])}</code></strong><br>Source SHA-256 prefix</div>'
         "</section>"
-        '<p class="notice"><strong>Identity boundary:</strong> this project page is the stable documentation endpoint requested for the repository. The source ontology IRI shown above remains the semantic identifier until an explicit versioned namespace-migration ADR says otherwise.</p>'
+        '<p class="notice"><strong>Identity boundary:</strong> this project page is the stable documentation endpoint requested for the repository. Per ADR 0207 the repository-case ontology IRI shown above is the canonical semantic identifier; the lowercase namespace remains a deprecated compatibility vocabulary with validated mappings.</p>'
         '<nav class="on-this-page" aria-label="Ontology term categories"><strong>Term categories</strong><ul>'
         f"{nav}</ul></nav>"
         f"{term_sections}"
@@ -400,6 +406,7 @@ def _write_manifest(
         "documentation_url": DOCUMENTATION_URL,
         "generated_artifacts": [
             "index.html",
+            "lineageweave-kg-shapes.ttl",
             "manifest.json",
             "namespace-compatibility.ttl",
             "ontology.jsonld",
@@ -407,6 +414,7 @@ def _write_manifest(
             "ontology.ttl",
             "prov-o-support-profile.ttl",
         ],
+        "shapes_path": SHAPES_RELATIVE_PATH.as_posix(),
         "ontology_triple_count": len(graph),
         "ontology_unique_term_count": term_count,
         "source_path": SOURCE_RELATIVE_PATH.as_posix(),
@@ -425,12 +433,15 @@ def build_site(repository_root: Path, output_dir: Path) -> None:
     source = root / SOURCE_RELATIVE_PATH
     prov_profile = root / PROV_PROFILE_RELATIVE_PATH
     compatibility = root / COMPATIBILITY_RELATIVE_PATH
+    shapes = root / SHAPES_RELATIVE_PATH
     if not source.is_file():
         raise FileNotFoundError(f"ontology source is missing: {source}")
     if not prov_profile.is_file():
         raise FileNotFoundError(f"PROV-O support profile is missing: {prov_profile}")
     if not compatibility.is_file():
         raise FileNotFoundError(f"namespace compatibility vocabulary is missing: {compatibility}")
+    if not shapes.is_file():
+        raise FileNotFoundError(f"SHACL shapes graph is missing: {shapes}")
 
     if output.exists():
         raise FileExistsError(
@@ -450,6 +461,7 @@ def build_site(repository_root: Path, output_dir: Path) -> None:
     shutil.copyfile(source, ontology_dir / "ontology.ttl")
     shutil.copyfile(prov_profile, ontology_dir / "prov-o-support-profile.ttl")
     shutil.copyfile(compatibility, ontology_dir / "namespace-compatibility.ttl")
+    shutil.copyfile(shapes, ontology_dir / "lineageweave-kg-shapes.ttl")
     _write_serializations(graph, ontology_dir)
     _write_manifest(ontology_dir, source, graph, term_count)
     (output / "robots.txt").write_text(
diff --git a/scripts/migrate_legacy_namespace.py b/scripts/migrate_legacy_namespace.py
index 758997970..eed95009f 100644
--- a/scripts/migrate_legacy_namespace.py
+++ b/scripts/migrate_legacy_namespace.py
@@ -1,13 +1,15 @@
 #!/usr/bin/env python3
-"""Migrate stored ``post_project_mention.ontology_iri`` values off the
-deprecated repository-case namespace onto the canonical lowercase one.
-
-ADR 0157 keeps ``https://contextualwisdomlab.github.io/lineageweave/ontology#``
-canonical and demotes ``https://contextualwisdomlab.github.io/LineageWeave/ontology#``
-to a deprecated compatibility namespace. New writes mint only canonical
-IRIs (``lineageweave.ontology`` loads the lowercase graph), but rows written
-before the decision can still carry repository-case IRIs. RDF consumers treat
-the two spellings as different resources, so leaving them split makes
+"""Migrate stored ``post_project_mention.ontology_iri`` values onto the
+canonical repository-case namespace.
+
+ADR 0207 supersedes ADR 0157 and makes
+``https://contextualwisdomlab.github.io/LineageWeave/ontology#`` canonical
+-- the exact project path GitHub Pages serves -- while demoting
+``https://contextualwisdomlab.github.io/lineageweave/ontology#`` to a
+deprecated compatibility namespace. New writes mint only canonical IRIs
+(``lineageweave.ontology`` loads the repository-case graph), but rows
+written before this decision can still carry lowercase IRIs. RDF consumers
+treat the two spellings as different resources, so leaving them split makes
 downstream joins miss mentions that are semantically identical.
 
 This tool is deliberately *not* silent:
@@ -16,10 +18,12 @@
 - ``--apply`` performs exactly the printed rewrites inside one transaction;
 - the extraction provenance columns (``extraction_method``, confidence,
   evidence text) are never touched -- only the IRI spelling moves, so the
-  evidence chain of who extracted what remains intact per ADR 0157's
+  evidence chain of who extracted what remains intact per ADR 0207's
   "do not silently rewrite historical evidence" rule;
 - any IRI outside the two known namespaces is reported and left alone so an
-  unexpected third spelling cannot be bulk-mangled.
+  unexpected third spelling cannot be bulk-mangled;
+- the operation is idempotent -- rerunning on a migrated database reports
+  ``no legacy namespace rows remain`` and writes nothing.
 
 Usage::
 
@@ -34,8 +38,8 @@
 
 import asyncpg
 
-CANONICAL_NAMESPACE = "https://contextualwisdomlab.github.io/lineageweave/ontology#"
-LEGACY_NAMESPACE = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+CANONICAL_NAMESPACE = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+LEGACY_NAMESPACE = "https://contextualwisdomlab.github.io/lineageweave/ontology#"
 
 
 def canonicalize(iri: str) -> str | None:
diff --git a/scripts/publish_ontology_site.py b/scripts/publish_ontology_site.py
index 0bdc0c32f..91563f731 100644
--- a/scripts/publish_ontology_site.py
+++ b/scripts/publish_ontology_site.py
@@ -17,7 +17,7 @@
 from urllib.parse import urlsplit
 
 from rdflib import Graph, URIRef
-from rdflib.namespace import OWL, RDF, RDFS, SKOS
+from rdflib.namespace import OWL, RDF, RDFS, SH, SKOS
 
 try:
     from scripts.ontology_site_contract import public_fragment
@@ -28,8 +28,12 @@
 SOURCE_RELATIVE_PATH = Path("docs/ontology/lineageweave-kg.ttl")
 PROV_PROFILE_RELATIVE_PATH = Path("docs/ontology/prov-o-support-profile.ttl")
 COMPATIBILITY_RELATIVE_PATH = Path("docs/ontology/namespace-compatibility.ttl")
-CANONICAL_NAMESPACE = "https://contextualwisdomlab.github.io/lineageweave/ontology#"
-DEPRECATED_NAMESPACE = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+SHAPES_RELATIVE_PATH = Path("docs/ontology/lineageweave-kg-shapes.ttl")
+#: ADR 0207: the repository-case namespace is canonical and the
+#: lowercase form is the deprecated compatibility vocabulary.
+CANONICAL_NAMESPACE = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+DEPRECATED_NAMESPACE = "https://contextualwisdomlab.github.io/lineageweave/ontology#"
+STANDARD_SHACL_PATHS = frozenset({RDF.subject, RDF.predicate, RDF.object})
 
 _MAPPING_FOR_KIND = {
     OWL.Class: OWL.equivalentClass,
@@ -131,6 +135,62 @@ def validate_compatibility_graph(
             raise ValueError("namespace compatibility mapping uses the wrong predicate")
 
 
+def validate_shapes_graph(shapes: Graph, canonical: Graph) -> None:
+    """Reject SHACL shapes whose targets dangle outside the ontology.
+
+    A shape that targets a class absent from the canonical graph, or
+    constrains a path neither declared there nor one of RDF's three
+    reification predicates, would silently validate nothing -- the
+    publication boundary refuses it instead (ADR 0207 decision 10).
+    Only URI-valued targets and paths are checked; literal sh:path values
+    are not part of this contract.
+    """
+    if not any(shapes.triples((None, RDF.type, SH.NodeShape))):
+        raise ValueError("SHACL shapes graph declares no sh:NodeShape")
+    for predicate in (SH.targetClass, SH.path):
+        for value in shapes.objects(None, predicate):
+            if (
+                not isinstance(value, URIRef)
+                or str(value).startswith(CANONICAL_NAMESPACE)
+                or (predicate == SH.path and value in STANDARD_SHACL_PATHS)
+            ):
+                continue
+            kind = "targetClass" if predicate == SH.targetClass else "path"
+            raise ValueError(
+                f"SHACL {kind} target outside the canonical namespace: {value}"
+            )
+    declared = {
+        subject
+        for subject in canonical.subjects(RDF.type, OWL.Class)
+        if isinstance(subject, URIRef)
+    }
+    declared.update(
+        subject
+        for subject in canonical.subjects(RDF.type, SKOS.Concept)
+        if isinstance(subject, URIRef)
+    )
+    declared.update(
+        subject
+        for subject in canonical.subjects(RDF.type, OWL.ObjectProperty)
+        if isinstance(subject, URIRef)
+    )
+    declared.update(
+        subject
+        for subject in canonical.subjects(RDF.type, OWL.DatatypeProperty)
+        if isinstance(subject, URIRef)
+    )
+    # Entailed classes: anything with a subclass assertion is a class.
+    declared.update(str(subject) for subject, _ in canonical.subject_objects(RDFS.subClassOf))
+    declared = {str(subject) for subject in declared}
+    declared.update(map(str, STANDARD_SHACL_PATHS))
+    for target in shapes.objects(None, SH.targetClass):
+        if str(target) not in declared:
+            raise ValueError(f"SHACL targetClass is not an ontology class: {target}")
+    for path in shapes.objects(None, SH.path):
+        if str(path) not in declared:
+            raise ValueError(f"SHACL property path is not an ontology term: {path}")
+
+
 def _validate_output_directory(output_dir: Path, source: Path, profile: Path) -> Path:
     """Resolve an output path and ensure replacement cannot delete source data."""
     requested = output_dir.expanduser()
@@ -150,6 +210,7 @@ def publish_site(repository_root: Path, output_dir: Path) -> None:
     source = root / SOURCE_RELATIVE_PATH
     profile = root / PROV_PROFILE_RELATIVE_PATH
     compatibility_source = root / COMPATIBILITY_RELATIVE_PATH
+    shapes_source = root / SHAPES_RELATIVE_PATH
     if not source.is_file():
         raise FileNotFoundError(f"ontology source is missing: {source}")
     if not profile.is_file():
@@ -158,14 +219,18 @@ def publish_site(repository_root: Path, output_dir: Path) -> None:
         raise FileNotFoundError(
             f"namespace compatibility vocabulary is missing: {compatibility_source}"
         )
+    if not shapes_source.is_file():
+        raise FileNotFoundError(f"SHACL shapes graph is missing: {shapes_source}")
 
     output = _validate_output_directory(output_dir, source, profile)
     renderer = _load_renderer(root)
     graph = Graph().parse(source, format="turtle")
     Graph().parse(profile, format="turtle")
     compatibility_graph = Graph().parse(compatibility_source, format="turtle")
+    shapes_graph = Graph().parse(shapes_source, format="turtle")
     validate_public_graph(graph, renderer)
     validate_compatibility_graph(graph, compatibility_graph)
+    validate_shapes_graph(shapes_graph, graph)
 
     if output.exists():
         shutil.rmtree(output)
diff --git a/tests/test_ontology.py b/tests/test_ontology.py
index e5f9084c3..e9514996c 100644
--- a/tests/test_ontology.py
+++ b/tests/test_ontology.py
@@ -21,6 +21,7 @@
     NODE_POST,
 )
 from lineageweave.ontology import (
+    LOOKUP_CODE,
     LW,
     all_declared_lookup_codes,
     iri_for_lookup_code,
@@ -37,17 +38,20 @@
 # text -- read alongside it below so the round-trip still sees them:
 # 0012 (ADR 0006: prov_person/prov_organization), 0014 (ADR 0007:
 # prov_team), 0016 (ADR 0009: node_team/edge_mention_team/
-# edge_team_affiliation/edge_mention_organization).
+# edge_team_affiliation/edge_mention_organization), and 0042 (ADR 0207:
+# the five governed voc_type post-type codes).
 _ADDITIONAL_LOOKUP_MIGRATION_PATHS = (
     Path(__file__).resolve().parents[1] / "migrations" / "0060_role_responsibility_agent_type.sql",
     Path(__file__).resolve().parents[1] / "migrations" / "0014_role_responsibility_team_actor_type.sql",
     Path(__file__).resolve().parents[1] / "migrations" / "0016_cross_post_actor_identity.sql",
+    Path(__file__).resolve().parents[1] / "migrations" / "0042_voc_type_vocabulary.sql",
 )
 
-# The categories this ontology covers (ADR 0004's scope). seed_demo_data.py
-# also seeds categories this ontology deliberately does not model yet
-# (post_visibility, voc_type, permission, ticket_status) -- those are
-# real, expected gaps, not a test bug.
+# The categories this ontology covers (ADR 0004's scope, extended by
+# ADR 0207 with voc_type's post-type scheme). seed_demo_data.py also
+# seeds categories this ontology deliberately does not model yet
+# (post_visibility, permission, ticket_status) -- those are real,
+# expected gaps, not a test bug.
 _ONTOLOGY_COVERED_CATEGORIES = frozenset(
     {
         "node_type",
@@ -56,6 +60,7 @@
         "person_side",
         "corporate_entity_level",
         "prov_agent_type",
+        "voc_type",
     }
 )
 
@@ -205,7 +210,7 @@ def test_actor_mentions_follow_stored_edge_direction() -> None:
 def test_semantic_project_terms_preserve_post_evidence_and_confidence() -> None:
     """ADR 0036's project vocabulary must remain machine-checkable."""
     graph = load_ontology()
-    ontology = URIRef("https://contextualwisdomlab.github.io/lineageweave/ontology")
+    ontology = URIRef("https://contextualwisdomlab.github.io/LineageWeave/ontology")
     assert "OWL 2 Full" in str(graph.value(ontology, RDFS.comment))
     assert (LW.Project, RDF.type, OWL.Class) in graph
     assert (LW.ProjectMention, RDF.type, OWL.Class) in graph
@@ -231,3 +236,104 @@ def test_semantic_project_terms_preserve_post_evidence_and_confidence() -> None:
     assert (LW.projectEvidence, RDFS.range, XSD.string) in graph
     assert (LW.semanticConfidence, RDFS.range, XSD.decimal) in graph
     assert (LW.semanticConfidence, RDFS.domain, LW.ProjectMention) in graph
+
+
+def test_ontology_iri_is_repository_case_canonical() -> None:
+    """ADR 0207: the ontology IRI and every term IRI use the
+    repository-case namespace -- the exact path GitHub Pages serves --
+    and the lowercase spelling never appears as a minted subject.
+    """
+    canonical = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+    lowercase = "https://contextualwisdomlab.github.io/lineageweave/ontology#"
+    graph = load_ontology()
+    assert (
+        URIRef("https://contextualwisdomlab.github.io/LineageWeave/ontology"),
+        RDF.type,
+        OWL.Ontology,
+    ) in graph
+    assert str(LW) == canonical
+    for subject in set(graph.subjects()):
+        if isinstance(subject, URIRef):
+            assert not str(subject).startswith(lowercase), str(subject)
+
+
+def test_person_sides_are_declared_disjoint() -> None:
+    """ADR 0207 decision 9: a person side is our-side or counterparty,
+    never both -- stated with owl:disjointWith so reasoners refuse a row
+    that projects both codes.
+    """
+    graph = load_ontology()
+    assert (LW.OurSidePerson, OWL.disjointWith, LW.CounterpartyPerson) in graph
+
+
+def test_has_affiliate_is_the_stored_affiliation_inverse() -> None:
+    """Bidirectional affiliation queries resolve through :hasAffiliate;
+    like :mentions it carries no lookup code so one code keeps naming
+    exactly one stored property.
+    """
+    graph = load_ontology()
+    assert (LW.hasAffiliate, OWL.inverseOf, LW.affiliatedWith) in graph
+    assert (LW.hasAffiliate, RDFS.domain, LW.CorporateEntity) in graph
+    assert (LW.hasAffiliate, RDFS.range, LW.Person) in graph
+    declared_codes = all_declared_lookup_codes()
+    for value in graph.objects(LW.hasAffiliate, LOOKUP_CODE):
+        raise AssertionError(f":hasAffiliate must stay un-coded; found {value}")
+    assert "edge_affiliation" in declared_codes
+
+
+def test_node_attribute_datatype_properties_project_real_columns() -> None:
+    """ADR 0207 decision 7: attribute properties exist exactly for real
+    schema columns, with correct domains/ranges, and no property is
+    invented for a column that does not exist.
+    """
+    graph = load_ontology()
+    expected = {
+        (LW.postTitle, LW.Post, XSD.string),
+        (LW.postBody, LW.Post, XSD.string),
+        (LW.eventOccurredAt, LW.Post, XSD.dateTime),
+        (LW.personName, LW.Person, XSD.string),
+        (LW.lastKnownJobTitle, LW.Person, XSD.string),
+        (LW.entityName, LW.CorporateEntity, XSD.string),
+        (LW.entityCode, LW.CorporateEntity, XSD.string),
+    }
+    for prop, domain, datatype_range in expected:
+        assert (prop, RDF.type, OWL.DatatypeProperty) in graph, str(prop)
+        assert (prop, RDFS.domain, domain) in graph, str(prop)
+        assert (prop, RDFS.range, datatype_range) in graph, str(prop)
+
+
+def test_shared_timestamps_declare_no_domain_to_avoid_multi_domain_entailment() -> None:
+    """Two rdfs:domain statements would entail every subject belongs to
+    both classes -- the trap the cross-post edges already avoid. Shared
+    timestamps therefore carry no domain; SHACL pins them per class.
+    """
+    graph = load_ontology()
+    for prop in (LW.createdAt, LW.updatedAt):
+        assert (prop, RDF.type, OWL.DatatypeProperty) in graph
+        assert (prop, RDFS.range, XSD.dateTime) in graph
+        domains = list(graph.objects(prop, RDFS.domain))
+        assert domains == [], f"{prop} unexpectedly declares domains: {domains}"
+
+
+def test_post_type_scheme_covers_the_governed_voc_vocabulary() -> None:
+    """ADR 0207 decision 8: the five seeded voc_type codes become SKOS
+    concepts; vos exists only as rel_vos and must NOT appear here.
+    """
+    graph = load_ontology()
+    scheme_members = {
+        subject for subject in graph.subjects(SKOS.inScheme, LW.postTypeScheme)
+    }
+    expected = {
+        (LW.voiceOfCustomerType, "voc"),
+        (LW.voiceOfCustomersCustomerType, "vocc"),
+        (LW.voiceOfCompetitorType, "voco"),
+        (LW.voiceOfMarketType, "vom"),
+        (LW.voiceOfPartnerType, "vop"),
+    }
+    for concept, code in expected:
+        assert concept in scheme_members, str(concept)
+        assert iri_for_lookup_code(code) == str(concept)
+    assert len(scheme_members) == len(expected)
+    seeded = _seeded_lookup_codes_for_covered_categories()
+    assert {"voc", "vocc", "voco", "vom", "vop"} <= seeded
+    assert iri_for_lookup_code("vos") is None  # relationship type only
diff --git a/tests/test_ontology_shapes.py b/tests/test_ontology_shapes.py
new file mode 100644
index 000000000..d26b4f803
--- /dev/null
+++ b/tests/test_ontology_shapes.py
@@ -0,0 +1,227 @@
+"""Closed-world SHACL validation of the LineageWeave knowledge-graph
+ontology (ADR 0207 decision 10).
+
+OWL's open-world semantics infers; it does not verify that projected
+data arrived complete and in range (Knublauch & Kontokostas, 2017).
+`docs/ontology/lineageweave-kg-shapes.ttl` carries exactly that
+verification, and this module proves it works in both directions:
+
+- the shipped shapes graph conforms to the SHACL specification itself;
+- a representative post/mention projection passes;
+- the same projection with duplicate or above-range confidence -- or a missing
+  required title -- is rejected, naming the violated constraint.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+from rdflib import Graph, Literal, Namespace, URIRef
+from rdflib.namespace import RDF, XSD
+from pyshacl import validate as shacl_validate
+
+ROOT = Path(__file__).resolve().parents[1]
+KG_PATH = ROOT / "docs" / "ontology" / "lineageweave-kg.ttl"
+SHAPES_PATH = ROOT / "docs" / "ontology" / "lineageweave-kg-shapes.ttl"
+
+LW = "https://contextualwisdomlab.github.io/LineageWeave/ontology#"
+
+
+def _load_kg() -> Graph:
+    """Parse the source ontology graph fresh."""
+    return Graph().parse(KG_PATH, format="turtle")
+
+
+def _load_shapes() -> Graph:
+    """Parse the SHACL shapes graph fresh."""
+    return Graph().parse(SHAPES_PATH, format="turtle")
+
+
+def _conforms(data: Graph) -> tuple[bool, str]:
+    """Run pyshacl over ``data`` against the shipped shapes; return the
+    verdict plus the human-readable report text for assertions."""
+    conforms, _, report_text = shacl_validate(
+        data_graph=data,
+        shacl_graph=_load_shapes(),
+        ont_graph=_load_kg(),
+        inference="none",
+        advanced=True,
+    )
+    return bool(conforms), report_text
+
+
+def _representative_projection() -> Graph:
+    """Build one minimal but realistic DB-to-RDF projection: a post with
+    every required attribute, a person, an entity, an our-side person,
+    and a project mention whose evidence chain is intact.
+    """
+    data = _load_kg()
+    LWn = Namespace(LW)
+    post = URIRef(LW + "post-alpha")
+    data.add((post, RDF.type, LWn.Post))
+    data.add((post, LWn.postTitle, Literal("Line 3 downtime window")))
+    data.add((post, LWn.postBody, Literal("Customer reported a stoppage after changeover.")))
+    data.add(
+        (
+            post,
+            LWn.createdAt,
+            Literal("2026-08-25T01:23:45+00:00", datatype=XSD.dateTime),
+        )
+    )
+    person = URIRef(LW + "person-okonkwo")
+    data.add((person, RDF.type, LWn.Person))
+    data.add((person, LWn.personName, Literal("Sam Okonkwo")))
+    entity = URIRef(LW + "entity-acme")
+    data.add((entity, RDF.type, LWn.CorporateEntity))
+    data.add((entity, LWn.entityName, Literal("Acme Electronics Korea")))
+    data.add((entity, LWn.entityCode, Literal("ACME-KR")))
+    our_side = URIRef(LW + "person-our-side")
+    data.add((our_side, RDF.type, LWn.OurSidePerson))
+    # Our-side persons are SHACL instances of :Person through the
+    # subclass chain, so the required name applies to them as well --
+    # exactly like cataloged_person.person_name's NOT NULL.
+    data.add((our_side, LWn.personName, Literal("Dana Whitfield")))
+    mention = URIRef(LW + "mention-alpha")
+    project = URIRef(LW + "project-alpha")
+    data.add((project, RDF.type, LWn.Project))
+    data.add((mention, RDF.type, LWn.ProjectMention))
+    data.add((mention, RDF.subject, post))
+    data.add((mention, RDF.predicate, LWn.mentionsProject))
+    data.add((mention, RDF.object, project))
+    data.add(
+        (
+            mention,
+            LWn.semanticConfidence,
+            Literal("0.87", datatype=XSD.decimal),
+        )
+    )
+    data.add((mention, LWn.projectEvidence, Literal("proj-alpha kickoff cited verbatim.")))
+    return data
+
+
+def test_shipped_shapes_conform_to_shacl_specification() -> None:
+    """The shapes artifact itself must be valid SHACL before it may gate
+    anything else -- validated with no data graph attached to it.
+    """
+    conforms, report_text = _conforms(_load_shapes())
+    assert conforms, report_text
+
+
+def test_representative_db_projection_passes_validation() -> None:
+    """A realistic projection of real schema rows validates cleanly."""
+    conforms, report_text = _conforms(_representative_projection())
+    assert conforms, report_text
+
+
+@pytest.mark.parametrize(
+    ("mutation", "expected_fragment"),
+    [
+        pytest.param(
+            lambda g: g.remove(
+                (
+                    URIRef(LW + "post-alpha"),
+                    URIRef(LW + "postTitle"),
+                    None,
+                )
+            ),
+            "postTitle",
+            id="missing-required-post-title",
+        ),
+        pytest.param(
+            lambda g: g.remove(
+                (
+                    URIRef(LW + "mention-alpha"),
+                    RDF.subject,
+                    None,
+                )
+            ),
+            "mentioned by post",
+            id="missing-project-mention-subject",
+        ),
+        pytest.param(
+            lambda g: g.set(
+                (
+                    URIRef(LW + "mention-alpha"),
+                    RDF.predicate,
+                    URIRef(LW + "mentionsTeam"),
+                )
+            ),
+            "project mention predicate",
+            id="wrong-project-mention-predicate",
+        ),
+        pytest.param(
+            lambda g: g.set(
+                (
+                    URIRef(LW + "mention-alpha"),
+                    URIRef(LW + "semanticConfidence"),
+                    Literal("1.5", datatype=XSD.decimal),
+                )
+            ),
+            "semanticConfidence",
+            id="confidence-above-one",
+        ),
+        pytest.param(
+            lambda g: g.add(
+                (
+                    URIRef(LW + "mention-alpha"),
+                    URIRef(LW + "semanticConfidence"),
+                    Literal("0.5", datatype=XSD.decimal),
+                )
+            ),
+            "semanticConfidence",
+            id="duplicate-confidence",
+        ),
+        pytest.param(
+            lambda g: g.add(
+                (
+                    URIRef(LW + "person-our-side"),
+                    RDF.type,
+                    URIRef(LW + "CounterpartyPerson"),
+                )
+            ),
+            "OurSidePersonShape",
+            id="disjoint-person-side",
+        ),
+        pytest.param(
+            lambda g: g.remove(
+                (
+                    URIRef(LW + "entity-acme"),
+                    URIRef(LW + "entityCode"),
+                    None,
+                )
+            ),
+            "entityCode",
+            id="missing-entity-code",
+        ),
+    ],
+)
+def test_violations_are_rejected_with_the_right_constraint_name(
+    mutation, expected_fragment: str
+) -> None:
+    """Each broken projection fails closed and the report names the
+    property or shape that was violated, so operators see which column
+    projection drifted instead of a bare boolean.
+    """
+    data = _representative_projection()
+    mutation(data)
+    conforms, report_text = _conforms(data)
+    assert not conforms
+    assert expected_fragment in report_text
+
+
+def test_confidence_boundary_values_are_inclusive() -> None:
+    """Exactly 0.0 and 1.0 are legal -- the bound is [0.0, 1.0]
+    inclusive per ADR 0207 decision 10.
+    """
+    for value in ("0.0", "1.0"):
+        data = _representative_projection()
+        data.set(
+            (
+                URIRef(LW + "mention-alpha"),
+                URIRef(LW + "semanticConfidence"),
+                Literal(value, datatype=XSD.decimal),
+            )
+        )
+        conforms, report_text = _conforms(data)
+        assert conforms, f"{value} rejected:\n{report_text}"
diff --git a/tests/test_ontology_site.py b/tests/test_ontology_site.py
index 542cbe574..507932575 100644
--- a/tests/test_ontology_site.py
+++ b/tests/test_ontology_site.py
@@ -12,6 +12,7 @@
 
 from rdflib import Graph
 from rdflib.compare import isomorphic
+from rdflib.plugins.parsers.jsonld import to_rdf
 
 ROOT = Path(__file__).resolve().parents[1]
 SCRIPT = ROOT / "scripts" / "build_ontology_site.py"
@@ -69,6 +70,9 @@ def test_build_publishes_dereferenceable_html_and_machine_formats(tmp_path: Path
     assert (ontology_dir / "namespace-compatibility.ttl").read_bytes() == (
         ROOT / "docs" / "ontology" / "namespace-compatibility.ttl"
     ).read_bytes()
+    assert (ontology_dir / "lineageweave-kg-shapes.ttl").read_bytes() == (
+        ROOT / "docs" / "ontology" / "lineageweave-kg-shapes.ttl"
+    ).read_bytes()
 
     html = (ontology_dir / "index.html").read_text(encoding="utf-8")
     assert '<link rel="canonical" href="https://contextualwisdomlab.github.io/LineageWeave/ontology">' in html
@@ -79,6 +83,7 @@ def test_build_publishes_dereferenceable_html_and_machine_formats(tmp_path: Path
     assert "ontology.ttl" in html
     assert "ontology.jsonld" in html
     assert "ontology.nt" in html
+    assert "lineageweave-kg-shapes.ttl" in html
 
 
 def test_render_term_escapes_untrusted_ontology_text() -> None:
@@ -159,7 +164,8 @@ def test_serializations_round_trip_to_the_source_graph(tmp_path: Path) -> None:
     builder.build_site(ROOT, output)
 
     source = Graph().parse(ROOT / "docs" / "ontology" / "lineageweave-kg.ttl", format="turtle")
-    jsonld = Graph().parse(output / "ontology" / "ontology.jsonld", format="json-ld")
+    jsonld = Graph()
+    to_rdf(json.loads((output / "ontology" / "ontology.jsonld").read_text()), jsonld)
     ntriples = Graph().parse(output / "ontology" / "ontology.nt", format="nt")
     compatibility_source = Graph().parse(
         ROOT / "docs" / "ontology" / "namespace-compatibility.ttl", format="turtle"
@@ -196,6 +202,7 @@ def test_metadata_manifest_has_source_digest_and_no_build_clock(tmp_path: Path)
     assert manifest["documentation_url"] == "https://contextualwisdomlab.github.io/LineageWeave/ontology"
     assert manifest["generated_artifacts"] == [
         "index.html",
+        "lineageweave-kg-shapes.ttl",
         "manifest.json",
         "namespace-compatibility.ttl",
         "ontology.jsonld",
@@ -203,6 +210,7 @@ def test_metadata_manifest_has_source_digest_and_no_build_clock(tmp_path: Path)
         "ontology.ttl",
         "prov-o-support-profile.ttl",
     ]
+    assert manifest["shapes_path"] == "docs/ontology/lineageweave-kg-shapes.ttl"
 
 
 def test_helpers_cover_slash_fragments_json_lists_and_missing_ontology() -> None:
@@ -283,6 +291,17 @@ def test_builder_fails_closed_for_missing_sources_and_rejects_existing_output(tm
         (ROOT / "docs" / "ontology" / "namespace-compatibility.ttl").read_bytes()
     )
 
+    try:
+        builder.build_site(repository, output)
+    except FileNotFoundError as exc:
+        assert "SHACL shapes graph" in str(exc)
+    else:
+        raise AssertionError("missing SHACL shapes graph was accepted")
+
+    (ontology_dir / "lineageweave-kg-shapes.ttl").write_bytes(
+        (ROOT / "docs" / "ontology" / "lineageweave-kg-shapes.ttl").read_bytes()
+    )
+
     try:
         builder.build_site(repository, output)
     except FileExistsError as exc:
diff --git a/tests/test_post_chat.py b/tests/test_post_chat.py
index 879bf80df..9c6d2faf4 100644
--- a/tests/test_post_chat.py
+++ b/tests/test_post_chat.py
@@ -243,7 +243,7 @@ async def fake_hydrate(_conn, _node_keys):
 
     assert facts == (
         'node_person "Ada West" --edge_affiliation '
-        '(https://contextualwisdomlab.github.io/lineageweave/ontology#affiliatedWith)--> '
+        '(https://contextualwisdomlab.github.io/LineageWeave/ontology#affiliatedWith)--> '
         'node_corporate_entity "Demo Corp" [evidence_post_id=post-graph]',
     )
 
diff --git a/tests/test_prov_o.py b/tests/test_prov_o.py
index f0e63c13e..f2e9b8ad6 100644
--- a/tests/test_prov_o.py
+++ b/tests/test_prov_o.py
@@ -387,10 +387,10 @@ def test_support_profile_imports_prov_o_and_maps_product_classes() -> None:
     )
     profile = Graph().parse(profile_path, format="turtle")
     ontology_iri = URIRef(
-        "https://contextualwisdomlab.github.io/lineageweave/ontology/prov-o-support-profile.ttl"
+        "https://contextualwisdomlab.github.io/LineageWeave/ontology/prov-o-support-profile.ttl"
     )
-    local = Namespace("https://contextualwisdomlab.github.io/lineageweave/ontology#")
-    legacy = Namespace("https://contextualwisdomlab.github.io/LineageWeave/ontology#")
+    local = Namespace("https://contextualwisdomlab.github.io/LineageWeave/ontology#")
+    legacy = Namespace("https://contextualwisdomlab.github.io/lineageweave/ontology#")
     assert (
         ontology_iri,
         OWL.imports,
@@ -400,7 +400,7 @@ def test_support_profile_imports_prov_o_and_maps_product_classes() -> None:
         ontology_iri,
         OWL.imports,
         URIRef(
-            "https://contextualwisdomlab.github.io/lineageweave/ontology/namespace-compatibility.ttl"
+            "https://contextualwisdomlab.github.io/LineageWeave/ontology/namespace-compatibility.ttl"
         ),
     ) in profile
     assert (local.Post, RDFS.subClassOf, PROV.Entity) in profile
diff --git a/tests/test_publish_ontology_site.py b/tests/test_publish_ontology_site.py
index c34968aba..649b69507 100644
--- a/tests/test_publish_ontology_site.py
+++ b/tests/test_publish_ontology_site.py
@@ -51,6 +51,7 @@ def _repository_fixture(tmp_path: Path) -> Path:
         "lineageweave-kg.ttl",
         "prov-o-support-profile.ttl",
         "namespace-compatibility.ttl",
+        "lineageweave-kg-shapes.ttl",
     ):
         (ontology_dir / name).write_bytes((ROOT / "docs" / "ontology" / name).read_bytes())
     (scripts_dir / "build_ontology_site.py").write_bytes(
@@ -207,6 +208,78 @@ def test_compatibility_validation_is_term_kind_safe() -> None:
     assert publisher._term_kind(ambiguous, post) is None
 
 
+def test_shapes_validation_rejects_dangling_targets_and_outside_namespace() -> None:
+    """ADR 0207 decision 10: a shape targeting an undeclared class or
+    path validates nothing silently, so publication refuses it; only
+    canonical-namespace targets are allowed.
+    """
+    from rdflib.namespace import SH
+
+    publisher = _load_publisher()
+    canonical = Graph().parse(
+        ROOT / "docs" / "ontology" / "lineageweave-kg.ttl", format="turtle"
+    )
+
+    with pytest.raises(ValueError, match="declares no sh:NodeShape"):
+        publisher.validate_shapes_graph(Graph(), canonical)
+
+    outside_target = Graph()
+    outside_target.add((URIRef(f"{publisher.CANONICAL_NAMESPACE}PostShape"), RDF.type, SH.NodeShape))
+    outside_target.add(
+        (
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}PostShape"),
+            SH.targetClass,
+            URIRef("https://example.test/ontology#Ghost"),
+        )
+    )
+    with pytest.raises(ValueError, match="outside the canonical namespace"):
+        publisher.validate_shapes_graph(outside_target, canonical)
+
+    outside_path = Graph()
+    outside_path.add((URIRef(f"{publisher.CANONICAL_NAMESPACE}S"), RDF.type, SH.NodeShape))
+    outside_path.add(
+        (
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}S"),
+            SH.targetClass,
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}Post"),
+        )
+    )
+    outside_path.add(
+        (
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}S"),
+            SH.path,
+            URIRef("https://example.test/ontology#ghostProperty"),
+        )
+    )
+    with pytest.raises(ValueError, match="outside the canonical namespace"):
+        publisher.validate_shapes_graph(outside_path, canonical)
+
+    dangling_class = Graph()
+    dangling_class.add((URIRef(f"{publisher.CANONICAL_NAMESPACE}S"), RDF.type, SH.NodeShape))
+    dangling_class.add(
+        (
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}S"),
+            SH.targetClass,
+            URIRef(f"{publisher.CANONICAL_NAMESPACE}NotAClass"),
+        )
+    )
+    with pytest.raises(ValueError, match="not an ontology class"):
+        publisher.validate_shapes_graph(dangling_class, canonical)
+
+    dangling_path = Graph()
+    shape = URIRef(f"{publisher.CANONICAL_NAMESPACE}PostShape")
+    dangling_path.add((shape, RDF.type, SH.NodeShape))
+    dangling_path.add((shape, SH.targetClass, URIRef(f"{publisher.CANONICAL_NAMESPACE}Post")))
+    dangling_path.add((shape, SH.path, URIRef(f"{publisher.CANONICAL_NAMESPACE}ghostColumn")))
+    with pytest.raises(ValueError, match="not an ontology term"):
+        publisher.validate_shapes_graph(dangling_path, canonical)
+
+    publisher.validate_shapes_graph(
+        Graph().parse(ROOT / "docs" / "ontology" / "lineageweave-kg-shapes.ttl", format="turtle"),
+        canonical,
+    )
+
+
 def test_main_publishes_site(tmp_path: Path) -> None:
     publisher = _load_publisher()
     repository = _repository_fixture(tmp_path)
@@ -268,6 +341,12 @@ def test_publication_fails_closed_for_missing_sources(tmp_path: Path) -> None:
     with pytest.raises(FileNotFoundError, match="namespace compatibility"):
         publisher.publish_site(repository, output)
 
+    (ontology_dir / "namespace-compatibility.ttl").write_bytes(
+        (ROOT / "docs" / "ontology" / "namespace-compatibility.ttl").read_bytes()
+    )
+    with pytest.raises(FileNotFoundError, match="SHACL shapes graph"):
+        publisher.publish_site(repository, output)
+
 
 def test_module_entrypoint(tmp_path: Path, monkeypatch) -> None:
     import runpy
diff --git a/uv.lock b/uv.lock
index 4698a6cd7..6190681ba 100644
--- a/uv.lock
+++ b/uv.lock
@@ -513,6 +513,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/04/4b/29cac41a4d98d144bf5f6d33995617b185d14b22401f75ca86f384e87ff1/h11-0.16.0-py3-none-any.whl", hash = "sha256:63cf8bbe7522de3bf65932fda1d9c2772064ffb3dae62d55932da54b31cb6c86", size = 37515, upload-time = "2025-04-24T03:35:24.344Z" },
 ]
 
+[[package]]
+name = "html5rdf"
+version = "1.2.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/4c/55/1b839c43f5ed8207e17a9a02d8b395179520b8b4f00c00a41e113bc205ca/html5rdf-1.2.1.tar.gz", hash = "sha256:ace9b420ce52995bb4f05e7425eedf19e433c981dfe7a831ab391e2fa2e1a195", size = 287899, upload-time = "2024-10-30T05:06:56.384Z" }
+wheels = [
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+
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 name = "httpcore"
 version = "1.0.9"
@@ -597,7 +606,7 @@ wheels = [
 
 [[package]]
 name = "lineageweave"
-version = "2.17.0"
+version = "2.18.0"
 source = { editable = "." }
 dependencies = [
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@@ -625,6 +634,7 @@ dev = [
     { name = "httpx" },
     { name = "psycopg2-binary" },
     { name = "pyjwt", extra = ["crypto"] },
+    { name = "pyshacl" },
     { name = "pytest" },
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     { name = "pyjwt", extras = ["crypto"], marker = "extra == 'dev'", specifier = ">=2.8.0" },
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     { name = "pytest", marker = "extra == 'dev'", specifier = ">=8.0" },
     { name = "rankweave", git = "https://github.com/ContextualWisdomLab/RankWeave.git?rev=61c49c50d3b4a24fc9bd7c6d3a7f2f4ba19d7be6" },
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+version = "7.6.2"
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+dependencies = [
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+[[package]]
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+version = "3.18.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
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 name = "protobuf"
 version = "7.36.0"
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+[[package]]
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+version = "0.40.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "owlrl" },
+    { name = "packaging" },
+    { name = "prettytable" },
+    { name = "rdflib", extra = ["html"] },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/1f/b8/f92465fead905b7c5365631a3997107c896cf1e32f4f9a163bdaee54e4fb/pyshacl-0.40.1.tar.gz", hash = "sha256:011e3cf1a68b31747cb762ba3d755ae1bdcc464c8fad0dc212a9adc550719552", size = 1444205, upload-time = "2026-07-28T01:37:36.499Z" }
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+[package.optional-dependencies]
+html = [
+    { name = "html5rdf" },
+]
+
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+]
+
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 version = "17.0.1"