diff --git a/OpenAPI/TS28561_NdtNrm.yaml b/OpenAPI/TS28561_NdtNrm.yaml
index 019ecf975da8c9da331d9b11b07c70fc99da2fbe..d70651122a3611c738d8f05da3e224d2caf6289e 100644
--- a/OpenAPI/TS28561_NdtNrm.yaml
+++ b/OpenAPI/TS28561_NdtNrm.yaml
@@ -60,6 +60,8 @@ components:
             $ref: '#/components/schemas/NDTInputDescription'
           nDTJobExecutionRequirements:
             $ref: '#/components/schemas/NdtJobExecutionReqts'
+          ndtDataGeneration:
+            $ref: '#/components/schemas/DataGeneration'
           collaboratingNDT:
             description: >-
               It indicates the related NDT Job contributing as a collaborator to the executed NDT Job. It describes the DN of the collaborated NDT Job
@@ -217,6 +219,34 @@ components:
         performanceDataScalingFactor:
           type: integer
           maxItems: 1
+    DataGeneration:  
+      type: object
+      properties:
+        nDTDataGenObject:
+          type: array
+          uniqueItems: true
+          items:
+            $ref: 'TS28623_ComDefs.yaml#/components/schemas/Dn'
+        dataGenType:
+          type: array
+          uniqueItems: true
+          items:
+            $ref: '#/components/schemas/SimulationData'
+        dataGenTimeWindow:
+          $ref: 'TS28623_ComDefs.yaml#/components/schemas/TimeWindow'
+        dataGenQuantity:
+          $ref: '#/components/schemas/DataGenQuantity'
+    DataGenQuantity:
+      type: object
+      oneOf:
+        - required: [ numberOfData ]
+        - required: [ dataGenPeriod ]
+      properties:
+        numberOfData:
+          type: integer
+        dataGenPeriod:
+          type: integer
+
 
 
   #------Definition of JSON arrays for name-contained IOCs ---------------#