Minor wording additions.

Author: Roelant Vos

ClassLibrary/DataWarehouseAutomation/DataWarehouseAutomation/BusinessKeyDefinition.cs

@@ -5,6 +5,7 @@ namespace DataWarehouseAutomation;
 
 /// <summary>
 /// A Business Key, which consists of one or more components (column mappings) and has its own surrogate key.
+/// A Business Key is a special column, or combination of columns, that is defined separately outside of regular data item mappings.
 /// </summary>
 public class BusinessKeyDefinition
 {
@@ -33,4 +34,4 @@ public class BusinessKeyDefinition
     /// </summary>
     [JsonProperty("extensions", NullValueHandling = NullValueHandling.Ignore, DefaultValueHandling = DefaultValueHandling.Ignore)]
     public List<Extension>? Extensions { get; set; }
-}
+}

ClassLibrary/DataWarehouseAutomation/DataWarehouseAutomation/DataClassification.cs

@@ -3,7 +3,8 @@
 namespace DataWarehouseAutomation;
 
 /// <summary>
-/// A free form list of classifications (labels) and notes to add to a source-to-target mapping
+/// A free form list of classifications (labels) and notes to add to a data object mapping.
+/// A classification can be used to identify a certain type of data object mapping.
 /// </summary>
 public class DataClassification
 {