Index: Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs
===================================================================
diff -u -r2ab087c5f7b254eb7ea6d167b122afaea10b0ff6 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision 2ab087c5f7b254eb7ea6d167b122afaea10b0ff6)
+++ Demo/Ringtoets/src/Demo.Ringtoets/Commands/AddNewDemoAssessmentSectionCommand.cs	(.../AddNewDemoAssessmentSectionCommand.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -123,9 +123,9 @@
             demoAssessmentSection.BackgroundData.IsVisible = targetConfiguration.IsVisible;
             demoAssessmentSection.BackgroundData.Transparency = targetConfiguration.Transparency;
             demoAssessmentSection.BackgroundData.IsConfigured = targetConfiguration.IsConfigured;
-            demoAssessmentSection.BackgroundData.Parameters.Add("SourceCapabilitiesUrl", targetConfiguration.SourceCapabilitiesUrl);
-            demoAssessmentSection.BackgroundData.Parameters.Add("SelectedCapabilityIdentifier", targetConfiguration.SelectedCapabilityIdentifier);
-            demoAssessmentSection.BackgroundData.Parameters.Add("PreferredFormat", targetConfiguration.PreferredFormat);
+            demoAssessmentSection.BackgroundData.Parameters.Add(BackgroundDataIdentifiers.SourceCapabilitiesUrl, targetConfiguration.SourceCapabilitiesUrl);
+            demoAssessmentSection.BackgroundData.Parameters.Add(BackgroundDataIdentifiers.SelectedCapabilityIdentifier, targetConfiguration.SelectedCapabilityIdentifier);
+            demoAssessmentSection.BackgroundData.Parameters.Add(BackgroundDataIdentifiers.PreferredFormat, targetConfiguration.PreferredFormat);
         }
 
         private void InitializeDemoReferenceLine(AssessmentSection demoAssessmentSection)
Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Forms.Test/Views/ClosingStructuresFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Forms.Test/Views/ClosingStructuresFailureMechanismViewTest.cs	(.../ClosingStructuresFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Forms.Test/Views/ClosingStructuresFailureMechanismViewTest.cs	(.../ClosingStructuresFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -437,9 +437,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsBackgroundMapDataFactory.cs
===================================================================
diff -u -r7a4f8ff71ae5f81177fe5ff9cd78fdc7f24c69f4 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsBackgroundMapDataFactory.cs	(.../RingtoetsBackgroundMapDataFactory.cs)	(revision 7a4f8ff71ae5f81177fe5ff9cd78fdc7f24c69f4)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/RingtoetsBackgroundMapDataFactory.cs	(.../RingtoetsBackgroundMapDataFactory.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -100,9 +100,9 @@
 
             if (backgroundData.IsConfigured)
             {
-                mapData.Configure(backgroundData.Parameters["SourceCapabilitiesUrl"],
-                                  backgroundData.Parameters["SelectedCapabilityIdentifier"],
-                                  backgroundData.Parameters["PreferredFormat"]);
+                mapData.Configure(backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl],
+                                  backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier],
+                                  backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat]);
             }
 
             mapData.IsVisible = backgroundData.IsVisible;
Index: Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/BackgroundDataTestDataGeneratorTest.cs
===================================================================
diff -u -rbb9508f9833f710b3cd448b82dd1a146ec928b42 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/BackgroundDataTestDataGeneratorTest.cs	(.../BackgroundDataTestDataGeneratorTest.cs)	(revision bb9508f9833f710b3cd448b82dd1a146ec928b42)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil.Test/BackgroundDataTestDataGeneratorTest.cs	(.../BackgroundDataTestDataGeneratorTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -44,9 +44,9 @@
             Assert.AreEqual(mapData.IsVisible, backgroundData.IsVisible);
             Assert.AreEqual(mapData.Transparency, backgroundData.Transparency);
             Assert.AreEqual(3, backgroundData.Parameters.Count);
-            Assert.AreEqual(mapData.SourceCapabilitiesUrl, backgroundData.Parameters["SourceCapabilitiesUrl"]);
-            Assert.AreEqual(mapData.SelectedCapabilityIdentifier, backgroundData.Parameters["SelectedCapabilityIdentifier"]);
-            Assert.AreEqual(mapData.PreferredFormat, backgroundData.Parameters["PreferredFormat"]);
+            Assert.AreEqual(mapData.SourceCapabilitiesUrl, backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl]);
+            Assert.AreEqual(mapData.SelectedCapabilityIdentifier, backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier]);
+            Assert.AreEqual(mapData.PreferredFormat, backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat]);
         }
 
         [Test]
Index: Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil/BackgroundDataTestDataGenerator.cs
===================================================================
diff -u -rbb9508f9833f710b3cd448b82dd1a146ec928b42 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil/BackgroundDataTestDataGenerator.cs	(.../BackgroundDataTestDataGenerator.cs)	(revision bb9508f9833f710b3cd448b82dd1a146ec928b42)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.TestUtil/BackgroundDataTestDataGenerator.cs	(.../BackgroundDataTestDataGenerator.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -47,9 +47,9 @@
 
             if (wmtsMapData.IsConfigured)
             {
-                backgroundMapData.Parameters["SourceCapabilitiesUrl"] = wmtsMapData.SourceCapabilitiesUrl;
-                backgroundMapData.Parameters["SelectedCapabilityIdentifier"] = wmtsMapData.SelectedCapabilityIdentifier;
-                backgroundMapData.Parameters["PreferredFormat"] = wmtsMapData.PreferredFormat;
+                backgroundMapData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = wmtsMapData.SourceCapabilitiesUrl;
+                backgroundMapData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = wmtsMapData.SelectedCapabilityIdentifier;
+                backgroundMapData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = wmtsMapData.PreferredFormat;
             }
 
             return backgroundMapData;
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/FailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/FailureMechanismViewTest.cs	(.../FailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/FailureMechanismViewTest.cs	(.../FailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -378,9 +378,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/RingtoetsBackgroundMapDataFactoryTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/RingtoetsBackgroundMapDataFactoryTest.cs	(.../RingtoetsBackgroundMapDataFactoryTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Views/RingtoetsBackgroundMapDataFactoryTest.cs	(.../RingtoetsBackgroundMapDataFactoryTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -155,13 +155,13 @@
             WmtsMapData wmtsMapData = WmtsMapData.CreateDefaultPdokMapData();
             BackgroundData backgroundData = BackgroundDataTestDataGenerator.GetWmtsBackgroundMapData(wmtsMapData);
 
-            string originalSourceCapabilitiesUrl = backgroundData.Parameters["SourceCapabilitiesUrl"];
-            string originalSelectedCapabilityIdentifier = backgroundData.Parameters["SelectedCapabilityIdentifier"];
-            string originalPreferredFormat = backgroundData.Parameters["PreferredFormat"];
+            string originalSourceCapabilitiesUrl = backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl];
+            string originalSelectedCapabilityIdentifier = backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier];
+            string originalPreferredFormat = backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat];
 
-            backgroundData.Parameters["SourceCapabilitiesUrl"] = "some/url";
-            backgroundData.Parameters["SelectedCapabilityIdentifier"] = "identifier";
-            backgroundData.Parameters["PreferredFormat"] = "image/format";
+            backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some/url";
+            backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "identifier";
+            backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/format";
 
             // Call
             RingtoetsBackgroundMapDataFactory.UpdateBackgroundMapData(wmtsMapData, backgroundData);
Index: Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/Views/DuneErosionFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/Views/DuneErosionFailureMechanismViewTest.cs	(.../DuneErosionFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/DuneErosion/test/Ringtoets.DuneErosion.Forms.Test/Views/DuneErosionFailureMechanismViewTest.cs	(.../DuneErosionFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -356,9 +356,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/Views/GrassCoverErosionInwardsFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/Views/GrassCoverErosionInwardsFailureMechanismViewTest.cs	(.../GrassCoverErosionInwardsFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/GrassCoverErosionInwards/test/Ringtoets.GrassCoverErosionInwards.Forms.Test/Views/GrassCoverErosionInwardsFailureMechanismViewTest.cs	(.../GrassCoverErosionInwardsFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -424,9 +424,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismViewTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/Views/GrassCoverErosionOutwardsFailureMechanismViewTest.cs	(.../GrassCoverErosionOutwardsFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -318,9 +318,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismViewTest.cs	(.../HeightStructuresFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Forms.Test/Views/HeightStructuresFailureMechanismViewTest.cs	(.../HeightStructuresFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -434,9 +434,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/BackgroundDataProperties.cs
===================================================================
diff -u -r7a4f8ff71ae5f81177fe5ff9cd78fdc7f24c69f4 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/BackgroundDataProperties.cs	(.../BackgroundDataProperties.cs)	(revision 7a4f8ff71ae5f81177fe5ff9cd78fdc7f24c69f4)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/BackgroundDataProperties.cs	(.../BackgroundDataProperties.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -115,7 +115,7 @@
         {
             get
             {
-                return GetBackgroundMapDataParameter(data, nameof(SourceCapabilitiesUrl));
+                return GetBackgroundMapDataParameter(data, BackgroundDataIdentifiers.SourceCapabilitiesUrl);
             }
         }
 
@@ -127,7 +127,7 @@
         {
             get
             {
-                return GetBackgroundMapDataParameter(data, nameof(SelectedCapabilityIdentifier));
+                return GetBackgroundMapDataParameter(data, BackgroundDataIdentifiers.SelectedCapabilityIdentifier);
             }
         }
 
@@ -139,7 +139,7 @@
         {
             get
             {
-                return GetBackgroundMapDataParameter(data, nameof(PreferredFormat));
+                return GetBackgroundMapDataParameter(data, BackgroundDataIdentifiers.PreferredFormat);
             }
         }
 
Index: Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs
===================================================================
diff -u -r0e50500bb017c821970b286992f14b03dca0e69d -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision 0e50500bb017c821970b286992f14b03dca0e69d)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Plugin/RingtoetsPlugin.cs	(.../RingtoetsPlugin.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -936,9 +936,9 @@
                 var selectedWmtsMapData = selectedMapData as WmtsMapData;
                 if (selectedWmtsMapData != null)
                 {
-                    assessmentSection.BackgroundData.Parameters["SourceCapabilitiesUrl"] = selectedWmtsMapData.SourceCapabilitiesUrl;
-                    assessmentSection.BackgroundData.Parameters["SelectedCapabilityIdentifier"] = selectedWmtsMapData.SelectedCapabilityIdentifier;
-                    assessmentSection.BackgroundData.Parameters["PreferredFormat"] = selectedWmtsMapData.PreferredFormat;
+                    assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = selectedWmtsMapData.SourceCapabilitiesUrl;
+                    assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = selectedWmtsMapData.SelectedCapabilityIdentifier;
+                    assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = selectedWmtsMapData.PreferredFormat;
                 }
             }
 
Index: Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/BackgroundDataPropertiesTest.cs
===================================================================
diff -u -r250899bf76acee45d411a95377d8a021a0977a75 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/BackgroundDataPropertiesTest.cs	(.../BackgroundDataPropertiesTest.cs)	(revision 250899bf76acee45d411a95377d8a021a0977a75)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/BackgroundDataPropertiesTest.cs	(.../BackgroundDataPropertiesTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -132,9 +132,9 @@
                 BackgroundMapDataType = BackgroundMapDataType.Wmts,
                 Parameters =
                 {
-                    { "SourceCapabilitiesUrl", mapData.SourceCapabilitiesUrl },
-                    { "SelectedCapabilityIdentifier", mapData.SelectedCapabilityIdentifier },
-                    { "PreferredFormat", mapData.PreferredFormat }
+                    { BackgroundDataIdentifiers.SourceCapabilitiesUrl, mapData.SourceCapabilitiesUrl },
+                    { BackgroundDataIdentifiers.SelectedCapabilityIdentifier, mapData.SelectedCapabilityIdentifier },
+                    { BackgroundDataIdentifiers.PreferredFormat, mapData.PreferredFormat }
                 }
             };
 
@@ -293,9 +293,9 @@
                 BackgroundMapDataType = BackgroundMapDataType.Wmts,
                 Parameters =
                 {
-                    { "SourceCapabilitiesUrl", defaultPdokMapData.SourceCapabilitiesUrl },
-                    { "SelectedCapabilityIdentifier", defaultPdokMapData.SelectedCapabilityIdentifier },
-                    { "PreferredFormat", defaultPdokMapData.PreferredFormat }
+                    { BackgroundDataIdentifiers.SourceCapabilitiesUrl, defaultPdokMapData.SourceCapabilitiesUrl },
+                    { BackgroundDataIdentifiers.SelectedCapabilityIdentifier, defaultPdokMapData.SelectedCapabilityIdentifier },
+                    { BackgroundDataIdentifiers.PreferredFormat, defaultPdokMapData.PreferredFormat }
                 }
             };
 
Index: Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/AssessmentSectionViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/AssessmentSectionViewTest.cs	(.../AssessmentSectionViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/Views/AssessmentSectionViewTest.cs	(.../AssessmentSectionViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -272,9 +272,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/BackgroundDataTreeNodeInfoTest.cs
===================================================================
diff -u -r0c0f67f67e9e0928a5dd756914167d1d23615187 -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/BackgroundDataTreeNodeInfoTest.cs	(.../BackgroundDataTreeNodeInfoTest.cs)	(revision 0c0f67f67e9e0928a5dd756914167d1d23615187)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Plugin.Test/TreeNodeInfos/BackgroundDataTreeNodeInfoTest.cs	(.../BackgroundDataTreeNodeInfoTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -387,9 +387,9 @@
                 assessmentSection.BackgroundData.IsConfigured = mapData.IsConfigured;
                 assessmentSection.BackgroundData.Transparency = mapData.Transparency;
                 assessmentSection.BackgroundData.BackgroundMapDataType = BackgroundMapDataType.Wmts;
-                assessmentSection.BackgroundData.Parameters["SourceCapabilitiesUrl"] = mapData.SourceCapabilitiesUrl;
-                assessmentSection.BackgroundData.Parameters["SelectedCapabilityIdentifier"] = mapData.SelectedCapabilityIdentifier;
-                assessmentSection.BackgroundData.Parameters["PreferredFormat"] = mapData.PreferredFormat;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = mapData.SourceCapabilitiesUrl;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = mapData.SelectedCapabilityIdentifier;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = mapData.PreferredFormat;
 
                 DialogBoxHandler = (name, wnd) =>
                 {
@@ -446,9 +446,9 @@
                 assessmentSection.BackgroundData.IsConfigured = mapData.IsConfigured;
                 assessmentSection.BackgroundData.Transparency = mapData.Transparency;
                 assessmentSection.BackgroundData.BackgroundMapDataType = BackgroundMapDataType.Wmts;
-                assessmentSection.BackgroundData.Parameters["SourceCapabilitiesUrl"] = mapData.SourceCapabilitiesUrl;
-                assessmentSection.BackgroundData.Parameters["SelectedCapabilityIdentifier"] = mapData.SelectedCapabilityIdentifier;
-                assessmentSection.BackgroundData.Parameters["PreferredFormat"] = mapData.PreferredFormat;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = mapData.SourceCapabilitiesUrl;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = mapData.SelectedCapabilityIdentifier;
+                assessmentSection.BackgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = mapData.PreferredFormat;
 
                 DialogBoxHandler = (name, wnd) =>
                 {
@@ -542,9 +542,9 @@
             Assert.IsTrue(backgroundData.IsVisible);
             Assert.AreEqual(mapData.IsConfigured, backgroundData.IsConfigured);
             Assert.AreEqual(mapData.Transparency, backgroundData.Transparency);
-            Assert.AreEqual(mapData.SourceCapabilitiesUrl, backgroundData.Parameters["SourceCapabilitiesUrl"]);
-            Assert.AreEqual(mapData.SelectedCapabilityIdentifier, backgroundData.Parameters["SelectedCapabilityIdentifier"]);
-            Assert.AreEqual(mapData.PreferredFormat, backgroundData.Parameters["PreferredFormat"]);
+            Assert.AreEqual(mapData.SourceCapabilitiesUrl, backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl]);
+            Assert.AreEqual(mapData.SelectedCapabilityIdentifier, backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier]);
+            Assert.AreEqual(mapData.PreferredFormat, backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat]);
         }
 
         private static void AssertBackgroundMapDataProperties(BackgroundData expectedBackgroundData, BackgroundData actualBackgroundData)
Index: Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/Views/PipingFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/Views/PipingFailureMechanismViewTest.cs	(.../PipingFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Forms.Test/Views/PipingFailureMechanismViewTest.cs	(.../PipingFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -482,9 +482,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/Views/StabilityPointStructuresFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/Views/StabilityPointStructuresFailureMechanismViewTest.cs	(.../StabilityPointStructuresFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/StabilityPointStructures/test/Ringtoets.StabilityPointStructures.Forms.Test/Views/StabilityPointStructuresFailureMechanismViewTest.cs	(.../StabilityPointStructuresFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -436,9 +436,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/Views/StabilityStoneCoverFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/Views/StabilityStoneCoverFailureMechanismViewTest.cs	(.../StabilityStoneCoverFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/StabilityStoneCover/test/Ringtoets.StabilityStoneCover.Forms.Test/Views/StabilityStoneCoverFailureMechanismViewTest.cs	(.../StabilityStoneCoverFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -294,9 +294,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When
Index: Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Forms.Test/Views/WaveImpactAsphaltCoverFailureMechanismViewTest.cs
===================================================================
diff -u -r3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae -rf9db544ad22552799aaaedc2a154abd8765f7099
--- Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Forms.Test/Views/WaveImpactAsphaltCoverFailureMechanismViewTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismViewTest.cs)	(revision 3629ac885ef54cf9bb8e7f4be48a50e45b0c8eae)
+++ Ringtoets/WaveImpactAsphaltCover/test/Ringtoets.WaveImpactAsphaltCover.Forms.Test/Views/WaveImpactAsphaltCoverFailureMechanismViewTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismViewTest.cs)	(revision f9db544ad22552799aaaedc2a154abd8765f7099)
@@ -295,9 +295,9 @@
                 BackgroundData backgroundData = assessmentSection.BackgroundData;
 
                 backgroundData.Name = "some Name";
-                backgroundData.Parameters["SourceCapabilitiesUrl"] = "some URL";
-                backgroundData.Parameters["SelectedCapabilityIdentifier"] = "some Identifier";
-                backgroundData.Parameters["PreferredFormat"] = "image/some Format";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SourceCapabilitiesUrl] = "some URL";
+                backgroundData.Parameters[BackgroundDataIdentifiers.SelectedCapabilityIdentifier] = "some Identifier";
+                backgroundData.Parameters[BackgroundDataIdentifiers.PreferredFormat] = "image/some Format";
                 backgroundData.IsConfigured = true;
 
                 // When