diff --git a/OpenAPI/TS28623_ComDefs.yaml b/OpenAPI/TS28623_ComDefs.yaml
index 7f3b394e6358a5218ade1988b6a34fed7b9b826c..f668cc0afc6da1a7943f46fef90b2c7efd192e1b 100755
--- a/OpenAPI/TS28623_ComDefs.yaml
+++ b/OpenAPI/TS28623_ComDefs.yaml
@@ -191,11 +191,13 @@ components:
       enum:
         - LOCKED
         - UNLOCKED
+      default: LOCKED  
     OperationalState:
       type: string
       enum:
         - ENABLED
         - DISABLED
+      default: DISABLED  
     UsageState:
       type: string
       enum:
diff --git a/OpenAPI/TS28623_FileManagementNrm.yaml b/OpenAPI/TS28623_FileManagementNrm.yaml
index 6cdfde23ee47e4873a2eb5f239fd6defb213a53b..d117152d67578a0b351446b235264944c0d69da1 100644
--- a/OpenAPI/TS28623_FileManagementNrm.yaml
+++ b/OpenAPI/TS28623_FileManagementNrm.yaml
@@ -77,6 +77,7 @@ components:
                   enum:
                     - TRUE
                     - FALSE
+                  default: FALSE   
                 jobMonitor:
                   $ref: '#/components/schemas/FileDownloadJobProcessMonitor'
     Files-Single:
diff --git a/OpenAPI/TS28623_SubscriptionControlNrm.yaml b/OpenAPI/TS28623_SubscriptionControlNrm.yaml
index 750d318331e881f9a1a03aa03cca16ab5a93ebe4..c9ad4a37ca95eb4c2537369068cae5d8c8bb623d 100644
--- a/OpenAPI/TS28623_SubscriptionControlNrm.yaml
+++ b/OpenAPI/TS28623_SubscriptionControlNrm.yaml
@@ -58,8 +58,10 @@ components:
                 heartbeatNtfPeriod:
                   type: integer
                   minimum: 0
+                  default: 0
                 triggerHeartbeatNtf:
                   type: boolean
+                  default: FALSE
 
 #-------- Definition of YAML arrays for name-contained IOCs ----------------------
     NtfSubscriptionControl-Multiple:
diff --git a/OpenAPI/TS28623_TraceControlNrm.yaml b/OpenAPI/TS28623_TraceControlNrm.yaml
index 8edb3d55d8dc532a479c55d4bd4b1773b13ae2e0..483aedc2cc30d07f224c9efb6677028da382139b 100644
--- a/OpenAPI/TS28623_TraceControlNrm.yaml
+++ b/OpenAPI/TS28623_TraceControlNrm.yaml
@@ -29,7 +29,7 @@ components:
         - TRACE_AND_5GC_UE_LEVEL_MEASUREMENTS        
         - IMMEDIATE_MDT_AND_5GC_UE_LEVEL_MEASUREMENTS
         - TRACE_AND_IMMEDIATE_MDT_AND_5GC_UE_LEVEL_MEASUREMENTS           
-
+      default: TRACE_ONLY
     listOfInterfaces-Type:
       description: The interfaces to be recorded in the Network Element. See 3GPP TS 32.422 clause 5.5 for additional details.
       type: object
@@ -420,6 +420,7 @@ components:
         - VENDORMINIMUM
         - VENDORMEDIUM
         - VENDORMAXIMUM
+      default: MAXIMUM   
 
     traceReference-Type:
       type: object
@@ -442,6 +443,7 @@ components:
       enum:
         - FILE-BASED
         - STREAMING
+      default: FILE-BASED   
 
     traceTarget-Type:
       type: object
@@ -631,6 +633,7 @@ components:
       enum:
         - NO_IDENTITY
         - TAC_OF_IMEI
+      default: NO_IDENTITY  
     
     beamLevelMeasurement-Type:
       description: Determines whether beam level measurements shall be included in case of immediate MDT M1 measurement in NR. For additional details see 3GPP TS 32.422 clause 5.10.40.