diff --git a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
index 5126b30e..fc46e00a 100644
--- a/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
+++ b/dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs
@@ -299,40 +299,70 @@ namespace IEC61850
 
         }
 
+        /// <summary>
+        /// Logical device. Representation of a logical device (LD) in a data model.
+        /// </summary>
         public class LogicalDevice : ModelNode
         {
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern IntPtr LogicalDevice_create(string name, IntPtr parent);
 
-            private IedModel iedModel = null;
+            [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+            static extern IntPtr LogicalDevice_createEx(string name, IntPtr parent, string ldName);
 
-            public IedModel IedModel { get => iedModel; }
+            public IedModel IedModel { get; }
 
             public LogicalDevice (IntPtr self, IedModel iedModel) : base (self)
             {
-                this.iedModel = iedModel;
+                this.IedModel = iedModel;
             }
 
-            public LogicalDevice(string name, IedModel parent)
+            /// <summary>
+            /// Create a new logical device in a data model
+            /// </summary>
+            /// <param name="inst">LD instance</param>
+            /// <param name="parent">Model containing this logical device</param>
+            public LogicalDevice(string inst, IedModel parent)
             {
-                this.iedModel = parent;
+                this.IedModel = parent;
 
-                self = LogicalDevice_create(name, parent.self);
+                self = LogicalDevice_create(inst, parent.self);
+            }
+
+            /// <summary>
+            /// Create a new logical device in a data model (support for functional naming)
+            /// </summary>
+            /// <param name="inst">LD instance</param>
+            /// <param name="parent">Model containing this logical device</param>
+            /// <param name="ldName">LD name (for functional naming). When set, the exernally visible domain name for this LD</param>
+            public LogicalDevice(string inst, IedModel parent, string ldName)
+            {
+                this.IedModel = parent;
+
+                self = LogicalDevice_createEx(inst, parent.self, ldName);
             }
         }
 
+        /// <summary>
+        /// Logical node. Representation of a logical node (LN) in a data model.
+        /// </summary>
         public class LogicalNode : ModelNode
         {
             [DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
             static extern IntPtr LogicalNode_create(string name, IntPtr parent);
 
+            internal Dictionary<IntPtr, ReportControlBlock> rcbs = new Dictionary<IntPtr, ReportControlBlock>();
+
             public LogicalNode (IntPtr self, ModelNode parent) : base(self)
             {
                 this.parent = parent;
             }
 
-            internal Dictionary<IntPtr, ReportControlBlock> rcbs = new Dictionary<IntPtr, ReportControlBlock>();
-
+            /// <summary>
+            /// Initializes a new instance of the <see cref="T:IEC61850.Server.LogicalNode"/> class.
+            /// </summary>
+            /// <param name="name">LN name</param>
+            /// <param name="parent">Logical device containing this logical node.</param>
             public LogicalNode(string name, LogicalDevice parent)
             {
                 this.parent = parent;
diff --git a/dotnet/model_browsing/ModelBrowsing.cs b/dotnet/model_browsing/ModelBrowsing.cs
index 1322118e..bc9328c1 100644
--- a/dotnet/model_browsing/ModelBrowsing.cs
+++ b/dotnet/model_browsing/ModelBrowsing.cs
@@ -12,6 +12,27 @@ namespace model_browsing
 {
     class ModelBrowsing
     {
+        private static void PrintChildSpec(MmsVariableSpecification spec, int indent)
+        {
+            string indentStr = "";
+
+            for (int i = 0; i < indent; i++)
+                indentStr += " ";
+
+            if (spec.GetType() == MmsType.MMS_STRUCTURE)
+            {
+                foreach (MmsVariableSpecification elementSpec in spec)
+                {
+                    Console.WriteLine(indentStr + "DA: " +  elementSpec.GetName() + " : " + elementSpec.GetType());
+
+                    if (elementSpec.GetType() == MmsType.MMS_STRUCTURE || elementSpec.GetType() == MmsType.MMS_ARRAY)
+                    {
+                        PrintChildSpec(elementSpec, indent + 2);
+                    }
+                }
+            }
+        }
+
         public static void Main (string[] args)
         {
             IedConnection con = new IedConnection ();
@@ -73,11 +94,22 @@ namespace model_browsing
 								                   ObjectReference.getElementName(dataDirectoryElement) + " : " + specification.GetType()
 								                   + "(" + specification.Size() + ")");
 
-								if (specification.GetType() == MmsType.MMS_STRUCTURE) {
-									foreach (MmsVariableSpecification elementSpec in specification) {
-										Console.WriteLine("           " + elementSpec.GetName() + " : " + elementSpec.GetType());
-									}
-								}
+                                if (specification.GetType() == MmsType.MMS_STRUCTURE)
+                                {
+                                    foreach (MmsVariableSpecification elementSpec in specification)
+                                    {
+                                        PrintChildSpec(elementSpec, 8);
+                                        //Console.WriteLine("           " + elementSpec.GetName() + " : " + elementSpec.GetType());
+                                    }
+                                }
+                                else if (specification.GetType() == MmsType.MMS_ARRAY)
+                                {
+                                    MmsVariableSpecification arrayElementspec = specification.getArrayElementType();
+                                    PrintChildSpec(arrayElementspec, 8);
+
+
+                                    //Console.WriteLine("           elements: " + arrayElementspec.GetType());
+                                }
 							}
 
 						}