diff --git a/OpenAPI/TS28536_CoslaNrm.yaml b/OpenAPI/TS28536_CoslaNrm.yaml
index 54d2c5898b80ac041fa454e444906e97297d9dab..3848c2cd6de98c1a49b4d4389a39bedd034cc9ef 100755
--- a/OpenAPI/TS28536_CoslaNrm.yaml
+++ b/OpenAPI/TS28536_CoslaNrm.yaml
@@ -33,30 +33,35 @@ components:
 
     AssuranceGoalStatusObserved:
       type: string
+      readOnly: true
       enum:
         - FULFILLED
         - NOT_FULFILLED
 
     AssuranceGoalStatusPredicted:
       type: string
+      readOnly: true
       enum:
         - FULFILLED
         - NOT_FULFILLED
 
     AssuranceTargetStatusObserved:
       type: string
+      readOnly: true
       enum:
         - FULFILLED
         - NOT_FULFILLED
 
     AssuranceTargetStatusPredicted:
       type: string
+      readOnly: true
       enum:
         - FULFILLED
         - NOT_FULFILLED
 
     AssuranceTargetName:
       type: string
+      readOnly: true
 
     AssuranceTarget:
       type: object
@@ -65,6 +70,7 @@ components:
           $ref: '#/components/schemas/AssuranceTargetName'
         assuranceTargetValue:
           type: string
+          readOnly: true
          
     AssuranceTargetList:
       type: array
@@ -76,14 +82,13 @@ components:
       properties:
         assuranceGoalStatusId:
           type: string
+          readOnly: true
         assuranceGoalId:
-          $ref: 'TS28623_ComDefs.yaml#/components/schemas/Dn'
+          $ref: 'TS28623_ComDefs.yaml#/components/schemas/DnRo'
         assuranceGoalStatusObserved:
           $ref: '#/components/schemas/AssuranceGoalStatusObserved'
         assuranceGoalStatusPredicted:
           $ref: '#/components/schemas/AssuranceGoalStatusPredicted'
-        assuranceGoalRef:
-          $ref: 'TS28623_ComDefs.yaml#/components/schemas/Dn'
 
     AssuranceGoalStatusList:
       type: array
@@ -95,6 +100,7 @@ components:
       properties:
         assuranceTargetStatusId:
           type: string
+          readOnly: true
         assuranceTargetName:
           $ref: '#/components/schemas/AssuranceTargetName'
         assuranceTargetStatusObserved:
@@ -196,6 +202,8 @@ components:
                   properties:
                     assuranceGoalStatusList:
                       $ref: '#/components/schemas/AssuranceGoalStatusList'
+                    assuranceGoalRef:
+                      $ref: 'TS28623_ComDefs.yaml#/components/schemas/DnRo'                      
 
 #-------- Definition of JSON arrays for name-contained IOCs ----------------------