diff --git a/src/etapi/etapi.openapi.yaml b/src/etapi/etapi.openapi.yaml
index b8f0b5382..974acbdfe 100644
--- a/src/etapi/etapi.openapi.yaml
+++ b/src/etapi/etapi.openapi.yaml
@@ -31,7 +31,7 @@ paths:
         '201':
           description: note created
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 properties:
                   note:
@@ -43,7 +43,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /notes:
@@ -163,13 +163,13 @@ paths:
         '200':
           description: search response
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/SearchResponse'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /notes/{noteId}:
@@ -186,13 +186,13 @@ paths:
         '200':
           description: note response
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     patch:
@@ -208,13 +208,13 @@ paths:
         '200':
           description: note updated
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     delete:
@@ -226,7 +226,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /notes/{noteId}/content:
@@ -288,7 +288,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /notes/{noteId}/note-revision:
@@ -315,32 +315,10 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error'
-  /branches/{branchId}:
-    parameters:
-      - name: branchId
-        in: path
-        required: true
-        schema:
-          $ref: '#/components/schemas/EntityId'
-    get:
-      description: Returns a branch identified by its ID
-      operationId: getBranchById
-      responses:
-        '200':
-          description: branch response
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Branch'
-        default:
-          description: unexpected error
-          content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
+  /branches:
     post:
       description: >
         Create a branch (clone a note to a different location in the tree).
@@ -357,19 +335,42 @@ paths:
         '200':
           description: branch updated (branch between parent note and child note already existed)
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Branch'
         '201':
           description: branch created
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Branch'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
+              schema:
+                $ref: '#/components/schemas/Error'
+  /branches/{branchId}:
+    parameters:
+      - name: branchId
+        in: path
+        required: true
+        schema:
+          $ref: '#/components/schemas/EntityId'
+    get:
+      description: Returns a branch identified by its ID
+      operationId: getBranchById
+      responses:
+        '200':
+          description: branch response
+          content:
+            application/json; charset=utf-8:
+              schema:
+                $ref: '#/components/schemas/Branch'
+        default:
+          description: unexpected error
+          content:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     patch:
@@ -385,13 +386,13 @@ paths:
         '200':
           description: branch updated
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Branch'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     delete:
@@ -405,7 +406,30 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
+              schema:
+                $ref: '#/components/schemas/Error'
+  /attributes:
+    post:
+      description: create an attribute for a given note
+      operationId: postAttribute
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/Attribute'
+      responses:
+        '201':
+          description: attribute created
+          content:
+            application/json; charset=utf-8:
+              schema:
+                $ref: '#/components/schemas/Attribute'
+        default:
+          description: unexpected error
+          content:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /attributes/{attributeId}:
@@ -422,35 +446,13 @@ paths:
         '200':
           description: attribute response
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Attribute'
         default:
           description: unexpected error
           content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error'
-    post:
-      description: create an attribute for a given note
-      operationId: postAttribute
-      requestBody:
-        required: true
-        content:
-          application/json:
-            schema:
-              $ref: '#/components/schemas/Attribute'
-      responses:
-        '201':
-          description: attribute created
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Attribute'
-        default:
-          description: unexpected error
-          content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     patch:
@@ -466,13 +468,13 @@ paths:
         '200':
           description: attribute updated
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Attribute'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
     delete:
@@ -484,7 +486,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /refresh-note-ordering/{parentNoteId}:
@@ -506,7 +508,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /inbox/{date}:
@@ -527,13 +529,13 @@ paths:
         '200':
           description: inbox note
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /calendar/days/{date}:
@@ -552,13 +554,13 @@ paths:
         '200':
           description: day note
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /calendar/weeks/{date}:
@@ -577,13 +579,13 @@ paths:
         '200':
           description: week note
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /calendar/months/{month}:
@@ -602,13 +604,13 @@ paths:
         '200':
           description: month note
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /calendar/years/{year}:
@@ -627,13 +629,13 @@ paths:
         '200':
           description: year note
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Note'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /auth/login:
@@ -654,7 +656,7 @@ paths:
         '201':
           description: auth token
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 properties:
                   authToken:
@@ -665,7 +667,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /auth/logout:
@@ -678,7 +680,7 @@ paths:
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
   /app-info:
@@ -689,13 +691,13 @@ paths:
         '200':
           description: app info
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/AppInfo'
         default:
           description: unexpected error
           content:
-            application/json:
+            application/json; charset=utf-8:
               schema:
                 $ref: '#/components/schemas/Error'
 
@@ -774,7 +776,7 @@ components:
           type: string
         type:
           type: string
-          enum: [text, code, render, file, image, search, relationMap, book, noteMap, mermaid, webView, shortcut]
+          enum: [text, code, render, file, image, search, relationMap, book, noteMap, mermaid, webView, shortcut, doc, contentWidget, launcher]
         mime:
           type: string
         isProtected:
@@ -810,9 +812,6 @@ components:
     Branch:
       type: object
       description: Branch places the note into the tree, it represents the relationship between a parent note and child note
-      required:
-        - noteId
-        - parentNoteId
       properties:
         branchId:
           $ref: '#/components/schemas/EntityId'
@@ -837,8 +836,6 @@ components:
     Attribute:
       type: object
       description: Attribute (Label, Relation) is a key-value record attached to a note.
-      required:
-        - noteId
       properties:
         attributeId:
           $ref: '#/components/schemas/EntityId'
@@ -851,7 +848,7 @@ components:
           enum: [label, relation]
         name:
           type: string
-          pattern: '^[\p{L}\p{N}_:]+'
+          pattern: '^[^\s]+'
           example: shareCss
         value:
           type: string
@@ -881,7 +878,7 @@ components:
           description: debugging info on parsing the search query enabled with &debug=true parameter
     EntityId:
       type: string
-      pattern: '[a-zA-Z0-9]{4,32}'
+      pattern: '[a-zA-Z0-9_]{4,32}'
       example: evnnmvHTCgIn
     EntityIdList:
       type: array
@@ -889,7 +886,7 @@ components:
         $ref: '#/components/schemas/EntityId'
     LocalDateTime:
       type: string
-      pattern: '[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}\+[0-9]{4}'
+      pattern: '[0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2}\.[0-9]{3}[\+\-][0-9]{4}'
       example: 2021-12-31 20:18:11.939+0100
     UtcDateTime:
       type: string
@@ -897,10 +894,6 @@ components:
       example: 2021-12-31 19:18:11.939Z
     AppInfo:
       type: object
-      required:
-        - statu
-        - code
-        - message
       properties:
         appVersion:
           type: string