Index: Ringtoets/Piping/src/Ringtoets.Piping.IO/Readers/XMLPipingConfigurationSchema.xsd
===================================================================
diff -u -r690fafe3fa5706286e03c26d78050ebc59fdfcf7 -r87f2a9ca76ec0a77b2dcc6bf69c6d9d8a3b29168
--- Ringtoets/Piping/src/Ringtoets.Piping.IO/Readers/XMLPipingConfigurationSchema.xsd	(.../XMLPipingConfigurationSchema.xsd)	(revision 690fafe3fa5706286e03c26d78050ebc59fdfcf7)
+++ Ringtoets/Piping/src/Ringtoets.Piping.IO/Readers/XMLPipingConfigurationSchema.xsd	(.../XMLPipingConfigurationSchema.xsd)	(revision 87f2a9ca76ec0a77b2dcc6bf69c6d9d8a3b29168)
@@ -107,10 +107,10 @@
 	</xs:element>
 	<xs:element name="stochast">
 		<xs:complexType>
-			<xs:all>
+			<xs:sequence>
 				<xs:element ref="verwachtingswaarde"/>
 				<xs:element ref="standaardafwijking"/>
-			</xs:all>
+			</xs:sequence>
 			<xs:attribute name="naam" use="required">
 				<xs:simpleType>
 					<xs:restriction base="xs:string">
Index: Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs
===================================================================
diff -u -rc85651351f64578aefc6913576430aed66325500 -r87f2a9ca76ec0a77b2dcc6bf69c6d9d8a3b29168
--- Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs	(.../PipingConfigurationReaderTest.cs)	(revision c85651351f64578aefc6913576430aed66325500)
+++ Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs	(.../PipingConfigurationReaderTest.cs)	(revision 87f2a9ca76ec0a77b2dcc6bf69c6d9d8a3b29168)
@@ -82,16 +82,16 @@
                                               "The 'naam' attribute is invalid - The value 'Test' is invalid according to its datatype 'String'")
                     .SetName("invalidStochastUnknownName");
                 yield return new TestCaseData("invalidStochastNoMean.xml",
-                                              "The element 'stochast' has incomplete content. List of possible elements expected: 'verwachtingswaarde'.")
+                                              "The element 'stochast' has invalid child element 'standaardafwijking'.")
                     .SetName("invalidStochastNoMean");
                 yield return new TestCaseData("invalidStochastNoStandardDeviation.xml",
-                                              "The element 'stochast' has incomplete content. List of possible elements expected: 'standaardafwijking'.")
+                                              "The element 'stochast' has incomplete content.")
                     .SetName("invalidStochastNoStandardDeviation");
                 yield return new TestCaseData("invalidStochastMultipleMean.xml",
-                                              "Element 'verwachtingswaarde' cannot appear more than once if content model type is \"all\".")
+                                              "The element 'stochast' has invalid child element 'verwachtingswaarde'.")
                     .SetName("invalidStochastMultipleMean");
                 yield return new TestCaseData("invalidStochastMultipleStandardDeviation.xml",
-                                              "Element 'standaardafwijking' cannot appear more than once if content model type is \"all\".")
+                                              "The element 'stochast' has invalid child element 'standaardafwijking'.")
                     .SetName("invalidStochastMultipleStandardDeviation");
                 yield return new TestCaseData("invalidStochastMeanEmpty.xml",
                                               "The 'verwachtingswaarde' element is invalid - The value '' is invalid according to its datatype 'Double'")