Index: Ringtoets/Common/src/Ringtoets.Common.IO/Resources/GolfReductieSchema.xsd
===================================================================
diff -u -rb84f4b9c37b5ce0bd49b65269c4984c0bc1543e8 -r3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd
--- Ringtoets/Common/src/Ringtoets.Common.IO/Resources/GolfReductieSchema.xsd	(.../GolfReductieSchema.xsd)	(revision b84f4b9c37b5ce0bd49b65269c4984c0bc1543e8)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/Resources/GolfReductieSchema.xsd	(.../GolfReductieSchema.xsd)	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -28,12 +28,12 @@
   gebruik maakt van dit element.-->
   <xs:element name="golfreductie">
     <xs:complexType>
-      <xs:all minOccurs ="1">
+      <xs:sequence>
         <xs:element ref="damgebruiken" minOccurs="0" maxOccurs="1"/>
         <xs:element ref="damtype" minOccurs="0" maxOccurs="1"/>
         <xs:element ref="damhoogte" minOccurs="0" maxOccurs="1"/>
         <xs:element ref="voorlandgebruiken" minOccurs="0" maxOccurs="1"/>
-      </xs:all>
+      </xs:sequence>
     </xs:complexType>
   </xs:element>
 
Index: Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs
===================================================================
diff -u -rd2d252d2b40a3c449f0ce7e7c7344213543af590 -r3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd
--- Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs	(.../PipingConfigurationReaderTest.cs)	(revision d2d252d2b40a3c449f0ce7e7c7344213543af590)
+++ Ringtoets/Piping/test/Ringtoets.Piping.IO.Test/Readers/PipingConfigurationReaderTest.cs	(.../PipingConfigurationReaderTest.cs)	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -165,7 +165,7 @@
             // Assert
             var exception = Assert.Throws<CriticalFileReadException>(call);
             Assert.IsInstanceOf<XmlSchemaValidationException>(exception.InnerException);
-            Assert.IsTrue(exception.InnerException?.Message.Contains(expectedParsingMessage));
+            StringAssert.Contains(expectedParsingMessage, exception.InnerException?.Message);
         }
 
         [Test]
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Readers/WaveConditionsInputConfigurationReaderTest.cs
===================================================================
diff -u -r7cccf1ec324774f5cc68ce9efcb7754b757c9370 -r3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Readers/WaveConditionsInputConfigurationReaderTest.cs	(.../WaveConditionsInputConfigurationReaderTest.cs)	(revision 7cccf1ec324774f5cc68ce9efcb7754b757c9370)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/Readers/WaveConditionsInputConfigurationReaderTest.cs	(.../WaveConditionsInputConfigurationReaderTest.cs)	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -64,6 +64,21 @@
                 yield return new TestCaseData("invalidCalculationMultipleStepSize.xml",
                                               "The element 'berekening' has invalid child element 'stapgrootte'.")
                     .SetName("invalidCalculationMultipleStepSize");
+                yield return new TestCaseData("invalidCalculationMultipleWaveReduction.xml",
+                                              "The element 'berekening' has invalid child element 'golfreductie'.")
+                    .SetName("invalidCalculationMultipleWaveReduction");
+                yield return new TestCaseData("invalidCalculationMultipleDamUsage.xml",
+                                              "The element 'golfreductie' has invalid child element 'damgebruiken'.")
+                    .SetName("invalidCalculationMultipleDamUsage");
+                yield return new TestCaseData("invalidCalculationMultipleDamType.xml",
+                                              "The element 'golfreductie' has invalid child element 'damtype'.")
+                    .SetName("invalidCalculationMultipleDamType");
+                yield return new TestCaseData("invalidCalculationMultipleDamHeight.xml",
+                                              "The element 'golfreductie' has invalid child element 'damhoogte'.")
+                    .SetName("invalidCalculationMultipleDamHeight");
+                yield return new TestCaseData("invalidCalculationMultipleForeshoreUsage.xml",
+                                              "The element 'golfreductie' has invalid child element 'voorlandgebruiken'.")
+                    .SetName("invalidCalculationMultipleForeshoreUsage");
                 yield return new TestCaseData("invalidConfigurationCalculationContainingEmptyHydraulicBoundaryLocation.xml",
                                               "The 'hrlocatie' element is invalid - The value '' is invalid according to its datatype 'String' - The actual length is less than the MinLength value.")
                     .SetName("invalidConfigurationCalculationContainingEmptyHydraulicBoundaryLocation");
@@ -127,6 +142,33 @@
                 yield return new TestCaseData("invalidOrientationWrongCulture.xml",
                                               "The 'orientatie' element is invalid - The value '0,5' is invalid according to its datatype 'Double'")
                     .SetName("invalidOrientationWrongCulture");
+                yield return new TestCaseData("invalidDamUsageEmpty.xml",
+                                              "The 'damgebruiken' element is invalid - The value '' is invalid according to its datatype 'Boolean'")
+                    .SetName("invalidDamUsageEmpty");
+                yield return new TestCaseData("invalidDamUsageNoBoolean.xml",
+                                              "The 'damgebruiken' element is invalid - The value 'string' is invalid according to its datatype 'Boolean'")
+                    .SetName("invalidDamUsageNoBoolean");
+                yield return new TestCaseData("invalidDamTypeEmpty.xml",
+                                              "The 'damtype' element is invalid - The value '' is invalid according to its datatype 'String'")
+                    .SetName("invalidDamTypeEmpty");
+                yield return new TestCaseData("invalidDamTypeUnknownValue.xml",
+                                              "The 'damtype' element is invalid - The value 'text' is invalid according to its datatype 'String' - The Enumeration constraint failed.")
+                    .SetName("invalidDamTypeUnknownValue");
+                yield return new TestCaseData("invalidDamHeightEmpty.xml",
+                                              "The 'damhoogte' element is invalid - The value '' is invalid according to its datatype 'Double'")
+                    .SetName("invalidDamHeightEmpty");
+                yield return new TestCaseData("invalidDamHeightNoDouble.xml",
+                                              "The 'damhoogte' element is invalid - The value 'string' is invalid according to its datatype 'Double'")
+                    .SetName("invalidDamHeightNoDouble");
+                yield return new TestCaseData("invalidDamHeightWrongCulture.xml",
+                                              "The 'damhoogte' element is invalid - The value '0,5' is invalid according to its datatype 'Double'")
+                    .SetName("invalidDamHeightWrongCulture");
+                yield return new TestCaseData("invalidForeshoreUsageEmpty.xml",
+                                              "The 'voorlandgebruiken' element is invalid - The value '' is invalid according to its datatype 'Boolean'")
+                    .SetName("invalidForeshoreUsageEmpty");
+                yield return new TestCaseData("invalidForeshoreUsageNoBoolean.xml",
+                                              "The 'voorlandgebruiken' element is invalid - The value 'string' is invalid according to its datatype 'Boolean'")
+                    .SetName("invalidForeshoreUsageNoBoolean");
             }
         }
 
@@ -156,7 +198,7 @@
             // Assert
             var exception = Assert.Throws<CriticalFileReadException>(call);
             Assert.IsInstanceOf<XmlSchemaValidationException>(exception.InnerException);
-            Assert.IsTrue(exception.InnerException?.Message.Contains(expectedParsingMessage));
+            StringAssert.Contains(expectedParsingMessage, exception.InnerException?.Message);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamHeight.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamHeight.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamHeight.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Berekening 1">
+	<golfreductie>
+	  <damhoogte>1.3</damhoogte>
+	  <damhoogte>1.2</damhoogte>
+	</golfreductie>
+  </berekening>
+</configuratie>
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamType.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamType.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamType.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Berekening 1">
+	<golfreductie>
+	  <damtype>verticalewand</damtype>
+	  <damtype>havendam</damtype>
+	</golfreductie>
+  </berekening>
+</configuratie>
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamUsage.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamUsage.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleDamUsage.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Berekening 1">
+	<golfreductie>
+	  <damgebruiken>true</damgebruiken>
+	  <damgebruiken>false</damgebruiken>
+	</golfreductie>
+  </berekening>
+</configuratie>
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleForeshoreUsage.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleForeshoreUsage.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleForeshoreUsage.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Berekening 1">
+	<golfreductie>
+	  <voorlandgebruiken>true</voorlandgebruiken>
+	  <voorlandgebruiken>false</voorlandgebruiken>
+	</golfreductie>
+  </berekening>
+</configuratie>
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleWaveReduction.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleWaveReduction.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidCalculationMultipleWaveReduction.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Berekening 1">
+	<golfreductie/>
+	<golfreductie/>
+  </berekening>
+</configuratie>
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightEmpty.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightEmpty.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightEmpty.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damhoogte/>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightNoDouble.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightNoDouble.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightNoDouble.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damhoogte>string</damhoogte>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightWrongCulture.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightWrongCulture.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamHeightWrongCulture.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damhoogte>0,5</damhoogte>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeEmpty.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeEmpty.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeEmpty.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damtype/>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeUnknownValue.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeUnknownValue.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamTypeUnknownValue.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damtype>text</damtype>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageEmpty.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageEmpty.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageEmpty.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damgebruiken/>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageNoBoolean.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageNoBoolean.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidDamUsageNoBoolean.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <damgebruiken>string</damgebruiken>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageEmpty.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageEmpty.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageEmpty.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <voorlandgebruiken/>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file
Index: Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageNoBoolean.xml
===================================================================
diff -u
--- Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageNoBoolean.xml	(revision 0)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.IO.Test/test-data/WaveConditionsInputConfigurationReader/invalidForeshoreUsageNoBoolean.xml	(revision 3fbce64e43a4c8bcd6928e9f5df916a0bc47c8dd)
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuratie>
+  <berekening naam="Calculation">
+    <golfreductie>
+	  <voorlandgebruiken>string</voorlandgebruiken>
+	</golfreductie>
+  </berekening>
+</configuratie>
\ No newline at end of file