diff --git a/OpenAPI/TS28312_IntentNrm.yaml b/OpenAPI/TS28312_IntentNrm.yaml
index 575f97efdfb3c7617a238b6ff6c325bbcab2bb6a..0fcb604838fb22759ed32dbfec97be3a97e9d938 100644
--- a/OpenAPI/TS28312_IntentNrm.yaml
+++ b/OpenAPI/TS28312_IntentNrm.yaml
@@ -151,6 +151,11 @@ components:
           uniqueItems: true
           items:
             $ref: '#/components/schemas/Context'
+        preferenceWeight:
+          type: integer
+          minimum: 0
+          maximum: 10
+          description: It represents the preference information of the Consumer on expectations.
       required:
         - expectationId
    #-------Definition of the generic IntentExpectation dataType ----------#    
@@ -330,6 +335,12 @@ components:
           items:
             $ref: '#/components/schemas/Context'
           description: It describes the list of constraints and conditions that should apply for a specific expectationTarget.
+        preferenceWeight:
+          type: integer
+          minimum: 0
+          maximum: 10
+          description: It represents the preference information of the Consumer on expectationTargets.
+
    #-------Definition of the generic ExpectationTarget  dataType----------#  
    
    #-------Definition of the generic Context dataType----------------#