diff --git a/frontend/public/schemas/20251121/linkml/manifest.json b/frontend/public/schemas/20251121/linkml/manifest.json
index 0452289fe8..e1938ec888 100644
--- a/frontend/public/schemas/20251121/linkml/manifest.json
+++ b/frontend/public/schemas/20251121/linkml/manifest.json
@@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-26T23:50:10.883Z",
+  "generated": "2026-01-27T08:03:23.376Z",
   "schemaRoot": "/schemas/20251121/linkml",
   "totalFiles": 3014,
   "categoryCounts": {
diff --git a/schemas/20251121/linkml/manifest.json b/schemas/20251121/linkml/manifest.json
index e1938ec888..76a6332c6a 100644
--- a/schemas/20251121/linkml/manifest.json
+++ b/schemas/20251121/linkml/manifest.json
@@ -1,5 +1,5 @@
 {
-  "generated": "2026-01-27T08:03:23.376Z",
+  "generated": "2026-01-27T08:04:51.838Z",
   "schemaRoot": "/schemas/20251121/linkml",
   "totalFiles": 3014,
   "categoryCounts": {
diff --git a/schemas/20251121/linkml/modules/classes/AnnotationType.yaml b/schemas/20251121/linkml/modules/classes/AnnotationType.yaml
new file mode 100644
index 0000000000..9a5588ae3c
--- /dev/null
+++ b/schemas/20251121/linkml/modules/classes/AnnotationType.yaml
@@ -0,0 +1,47 @@
+# AnnotationType class
+# Abstract base class for annotation types classification
+#
+# Generation date: 2026-01-27
+# Rule compliance: 0b (Type/Types pattern), 38, 39, 53
+#
+# Created for has_annotation_type migration
+
+id: https://nde.nl/ontology/hc/class/AnnotationType
+name: AnnotationType
+title: Annotation Type Abstract Class
+
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+  skos: http://www.w3.org/2004/02/skos/core#
+
+default_prefix: hc
+
+imports:
+  - linkml:types
+  - ../slots/has_or_had_label
+  - ../slots/has_or_had_code
+  - ../slots/has_or_had_description
+
+classes:
+  AnnotationType:
+    class_uri: skos:Concept
+    description: |
+      Abstract base class for annotation types classification.
+      Provides a taxonomy for different types of annotations.
+    abstract: true
+    exact_mappings:
+      - skos:Concept
+    slots:
+      - has_or_had_label
+      - has_or_had_code
+      - has_or_had_description
+    slot_usage:
+      has_or_had_code:
+        range: string
+        required: true
+        description: Short code for the annotation type
+      has_or_had_label:
+        range: string
+        required: false
+        description: Human-readable name for the annotation type
diff --git a/schemas/20251121/linkml/modules/classes/AnnotationTypes.yaml b/schemas/20251121/linkml/modules/classes/AnnotationTypes.yaml
new file mode 100644
index 0000000000..4ea51b9f9e
--- /dev/null
+++ b/schemas/20251121/linkml/modules/classes/AnnotationTypes.yaml
@@ -0,0 +1,41 @@
+# AnnotationTypes classes
+# Concrete subclasses for AnnotationType taxonomy
+#
+# Generation date: 2026-01-27
+# Rule compliance: 0b (Type/Types pattern)
+#
+# Updated for AnnotationType migration
+
+id: https://nde.nl/ontology/hc/class/AnnotationTypes
+name: annotation_types_classes
+title: Annotation Types Classes
+description: |
+  Concrete subclasses for AnnotationType taxonomy.
+  Follows Rule 0b Type/Types naming pattern.
+imports:
+  - linkml:types
+  - ./AnnotationType
+prefixes:
+  linkml: https://w3id.org/linkml/
+  hc: https://nde.nl/ontology/hc/
+default_prefix: hc
+classes:
+  Comment:
+    is_a: AnnotationType
+    class_uri: hc:Comment
+    description: A comment on a resource.
+    
+  Tag:
+    is_a: AnnotationType
+    class_uri: hc:Tag
+    description: A tag or keyword associated with a resource.
+    
+  Highlight:
+    is_a: AnnotationType
+    class_uri: hc:Highlight
+    description: A highlighted segment of a resource.
+    
+  Correction:
+    is_a: AnnotationType
+    class_uri: hc:Correction
+    description: A correction to a resource.
diff --git a/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml b/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml
index 33efd5fd4f..5762eaf90f 100644
--- a/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml
+++ b/schemas/20251121/linkml/modules/classes/InformationCarrier.yaml
@@ -20,7 +20,10 @@ imports:
   - ../enums/CarrierTypeEnum
   # REMOVED 2026-01-15: ../slots/wikidata_id - inherits has_or_had_identifier from ExhibitedObject (Rule 53)
   - ../slots/isbn
-  - ../slots/has_annotation_by
+  - ../slots/contains_or_contained
+  - ../classes/Annotation
+  - ../slots/is_or_was_created_by
+  - ../classes/Agent
   - ../slots/has_archival_reference
   - ../slots/has_arrangement_level
   - ../slots/has_or_had_description
@@ -457,13 +460,15 @@ classes:
       #   range: string
       #   examples:
       #   - value: Extensive marginal annotations in 16th-century hand
-      has_annotation_by:
-        required: false
-        range: string
-        multivalued: true
+      contains_or_contained:
+        range: Annotation
+        description: Annotations on this information carrier.
         examples:
-        - value: John Dee
-        - value: Unknown 17th-century reader
+        - value:
+            has_or_had_description: "Partially illegible note in margin"
+            is_or_was_created_by:
+              has_or_had_label: "Archivist J. Smith"
+          description: Annotation by archivist
       includes_or_included:
         description: >-
           MIGRATED from bookplate (Rule 53).
diff --git a/schemas/20251121/linkml/modules/slots/has_annotation_by.yaml b/schemas/20251121/linkml/modules/slots/archive/has_annotation_by_archived_20260127.yaml
similarity index 100%
rename from schemas/20251121/linkml/modules/slots/has_annotation_by.yaml
rename to schemas/20251121/linkml/modules/slots/archive/has_annotation_by_archived_20260127.yaml