diff --git a/OpenAPI/TS28312_IntentNrm.yaml b/OpenAPI/TS28312_IntentNrm.yaml
index 937bfea948648a4780e477363433a4832c9b8ae0..6253b35839681e27e184a1920499ad375d128d14 100644
--- a/OpenAPI/TS28312_IntentNrm.yaml
+++ b/OpenAPI/TS28312_IntentNrm.yaml
@@ -34,6 +34,7 @@ components:
           intentExpectations:
             type: array
             uniqueItems: true
+            minItems: 1
             items:
               type: object
               oneOf:
@@ -104,6 +105,7 @@ components:
           intentHandlingCapabilityList:
             type: array
             uniqueItems: true
+            minItems: 1
             items:
               $ref: '#/components/schemas/IntentHandlingCapability'
           Intent:
@@ -130,6 +132,7 @@ components:
         expectationTargets:
           type: array
           uniqueItems: true
+          minItems: 1
           items:
             $ref: '#/components/schemas/ExpectationTarget'
         contextSelectivity:
@@ -294,6 +297,7 @@ components:
           oneOf:
             - type: array
               uniqueItems: true
+              minItems: 1
               items:
                 $ref: "#/components/schemas/ValueRangeType"
             - $ref: "#/components/schemas/ValueRangeType"
@@ -321,6 +325,7 @@ components:
             oneOf:
               - type: array
                 uniqueItems: true
+                minItems: 1
                 items:
                   $ref: "#/components/schemas/ValueRangeType"
               - $ref: "#/components/schemas/ValueRangeType" 
@@ -338,6 +343,7 @@ components:
         expectationFulfilmentResult:
           type: array
           uniqueItems: true
+          minItems: 1
           items: 
             $ref: '#/components/schemas/ExpectationFulfilmentResult'
    #-------Definition of the concrete IntentFulfilmentReport dataType----------------#
@@ -460,6 +466,7 @@ components:
         supportedExpectationTargetNames:
           type: array
           uniqueItems: true
+          minItems: 1
           items:
             type: string
             readOnly: true