Index: Ringtoets/Common/src/Ringtoets.Common.IO/Readers/CombinedXmlSchemaDefinition.cs
===================================================================
diff -u -r7683c48cab2de71c7e6e3960f43d491660a4b552 -r1d2bc8f06f058cf7bf75fffa684ceca7961ec1de
--- Ringtoets/Common/src/Ringtoets.Common.IO/Readers/CombinedXmlSchemaDefinition.cs	(.../CombinedXmlSchemaDefinition.cs)	(revision 7683c48cab2de71c7e6e3960f43d491660a4b552)
+++ Ringtoets/Common/src/Ringtoets.Common.IO/Readers/CombinedXmlSchemaDefinition.cs	(.../CombinedXmlSchemaDefinition.cs)	(revision 1d2bc8f06f058cf7bf75fffa684ceca7961ec1de)
@@ -32,8 +32,7 @@
 namespace Ringtoets.Common.IO.Readers
 {
     /// <summary>
-    /// Container for one or more related/nested schema definitions, representing a combined
-    /// XML Schema Definition (XSD).
+    /// Container for related/nested schema definitions, representing a combined XML Schema Definition (XSD).
     /// </summary>
     public class CombinedXmlSchemaDefinition
     {
@@ -42,11 +41,11 @@
         /// <summary>
         /// Creates a new instance of <see cref="CombinedXmlSchemaDefinition"/>.
         /// </summary>
-        /// <param name="mainSchemaDefinition">A string representing the main schema definition.</param>
+        /// <param name="mainSchemaDefinition">A <c>string</c> representing the main schema definition.</param>
         /// <param name="nestedSchemaDefinitions">A <see cref="IDictionary{TKey,TValue}"/> containing
-        /// one or more nested schema definitions; the keys should represent unique file names by which
-        /// the schema definitions can be referenced from <paramref name="mainSchemaDefinition"/>, the
-        /// values should represent the corresponding schema definition strings.</param>
+        /// zero to more nested schema definitions. The keys should represent unique file names by which
+        /// the schema definitions can be referenced from <paramref name="mainSchemaDefinition"/>; the
+        /// values should represent their corresponding schema definition <c>string</c>.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="nestedSchemaDefinitions"/>
         /// is <c>null</c>.</exception>
         /// <exception cref="ArgumentException">Thrown when:
@@ -90,9 +89,9 @@
         /// <summary>
         /// Check the provided schema definitions for not being <c>null</c>, empty or only containing white spaces.
         /// </summary>
-        /// <param name="mainSchemaDefinition">A string representing the main schema definition.</param>
+        /// <param name="mainSchemaDefinition">A <c>string</c> representing the main schema definition.</param>
         /// <param name="nestedSchemaDefinitions">A <see cref="IDictionary{TKey,TValue}"/> containing
-        /// one or more nested schema definitions.</param>
+        /// zero to more nested schema definitions.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="nestedSchemaDefinitions"/>
         /// is <c>null</c>.</exception>
         /// <exception cref="ArgumentException">Thrown when:
@@ -115,14 +114,14 @@
 
             if (nestedSchemaDefinitions.Values.Any(string.IsNullOrWhiteSpace))
             {
-                throw new ArgumentException($"'{nameof(nestedSchemaDefinitions)}' holds a nested schema definition value that equals null, is empty or only contains white spaces.");
+                throw new ArgumentException($"'{nameof(nestedSchemaDefinitions)}' contains one or more nested schema definitions that equal null, are empty or only contain white spaces.");
             }
         }
 
         /// <summary>
-        /// Compiles the <see cref="xmlSchemaSet"/> based on the provided main schema definition string.
+        /// Compiles the <see cref="xmlSchemaSet"/> based on the provided main schema definition.
         /// </summary>
-        /// <param name="mainSchemaDefinition">A string representing the main schema definition.</param>
+        /// <param name="mainSchemaDefinition">A <c>string</c> representing the main schema definition.</param>
         /// <exception cref="ArgumentException">Thrown when <paramref name="mainSchemaDefinition"/>,
         /// all together with its referenced nested schema definitions, contains an invalid schema
         /// definition.</exception>
@@ -136,7 +135,7 @@
             catch (Exception exception) when (exception is XmlException
                                               || exception is XmlSchemaException)
             {
-                throw new ArgumentException($"'{nameof(mainSchemaDefinition)}' containing invalid schema definition: {exception.Message}", exception);
+                throw new ArgumentException($"'{nameof(mainSchemaDefinition)}' invalid: {exception.Message}", exception);
             }
         }
 
@@ -152,7 +151,7 @@
             /// Creates a new instance of <see cref="NestedSchemaDefinitionsResolver"/>.
             /// </summary>
             /// <param name="nestedSchemaDefinitions">A <see cref="IDictionary{TKey,TValue}"/> containing
-            /// one or more nested schema definitions.</param>
+            /// zero to more nested schema definitions.</param>
             public NestedSchemaDefinitionsResolver(IDictionary<string, string> nestedSchemaDefinitions)
             {
                 this.nestedSchemaDefinitions = nestedSchemaDefinitions;
@@ -168,7 +167,7 @@
             }
 
             /// <summary>
-            /// Gets whether or not all nested schema definitions are used.
+            /// Gets whether all nested schema definitions are used.
             /// </summary>
             public bool AllNestedSchemaDefinitionsReferenced
             {