--- ex-b1-09-openapi-v1.yaml
+++ ex-b1-09-openapi-v1.1.yaml
@@ -1,29 +1,30 @@
 openapi: 3.1.0
 info:
   title: Records API
-  version: 1.0.0
+  version: 1.1.0
 paths:
-  /records/{record_id}:
+  /record/{id}:
     get:
       summary: Get a record
-      description: Returns one record.
+      description: Returns one record. Rate limiting may apply.
       operationId: getRecord
       parameters:
-        - name: record_id
+        - name: id
           in: path
           required: true
           schema:
-            type: integer
-            minimum: 1
+            type: string
       responses:
         "200":
-          description: Record found
+          description: Record found or absent
           content:
             application/json:
               schema:
-                $ref: "#/components/schemas/Record"
-        "404":
-          description: Record not found
+                oneOf:
+                  - $ref: "#/components/schemas/Record"
+                  - type: "null"
+        "429":
+          description: Too many requests
           content:
             application/json:
               schema:
                 $ref: "#/components/schemas/Problem"
@@ -32,12 +33,17 @@ components:
   schemas:
     Record:
       type: object
-      required: [id, title]
+      required: [id, title, owner_id]
       properties:
         id:
-          type: integer
+          type: string
         title:
           type: string
+        owner_id:
+          type: string
+        archived_at:
+          type: [string, "null"]
+          format: date-time
     Problem:
       type: object
       required: [code, message]