diff --git a/Yavsc/Model/Calendar/ProvidedEvent.cs b/Yavsc/Model/Calendar/ProvidedEvent.cs
index 837bdf50..f20e2246 100644
--- a/Yavsc/Model/Calendar/ProvidedEvent.cs
+++ b/Yavsc/Model/Calendar/ProvidedEvent.cs
@@ -30,6 +30,13 @@ namespace Yavsc.Models.Calendar
 	/// Provided event.
 	/// </summary>
 	public class ProvidedEvent : YaEvent {
+
+        public ProvidedEvent(string topic) : base(topic)
+        {
+            
+        }
+
+
 		/// <summary>
 		/// The privacy.
 		/// </summary>
diff --git a/Yavsc/Model/Messaging/BookQueryEvent.cs b/Yavsc/Model/Messaging/BookQueryEvent.cs
index ef8a7af4..53f5b40c 100644
--- a/Yavsc/Model/Messaging/BookQueryEvent.cs
+++ b/Yavsc/Model/Messaging/BookQueryEvent.cs
@@ -27,6 +27,10 @@ namespace Yavsc.Models.Messaging
 
 public class BookQueryEvent: YaEvent
 	{
+        public BookQueryEvent() : base("BookQuery")
+        {
+            
+        }
 		/// <summary>
 		/// The location.
 		/// </summary>
diff --git a/Yavsc/Model/Messaging/CircleEvent.cs b/Yavsc/Model/Messaging/CircleEvent.cs
index ad9de407..f9317eb5 100644
--- a/Yavsc/Model/Messaging/CircleEvent.cs
+++ b/Yavsc/Model/Messaging/CircleEvent.cs
@@ -29,6 +29,11 @@ namespace Yavsc.Models.Messaging
 	/// </summary>
 	public class CircleEvent: YaEvent
 	{
+        public CircleEvent(string topic) : base(topic)
+        {
+            
+        }
+
 		/// <summary>
 		/// Gets or sets the circles.
 		/// </summary>
diff --git a/Yavsc/Model/Messaging/YaEvent.cs b/Yavsc/Model/Messaging/YaEvent.cs
index f70b8e86..aca7190b 100644
--- a/Yavsc/Model/Messaging/YaEvent.cs
+++ b/Yavsc/Model/Messaging/YaEvent.cs
@@ -28,11 +28,14 @@ namespace Yavsc.Models.Messaging
 	/// </summary>
 	public class YaEvent : BaseEvent
 	{
+        public YaEvent(string topic)
+        {
+            Topic = topic;
+        }
 		/// <summary>
-		/// The name of the NF provider.
+		/// The topic.
 		/// </summary>
-		[Display(Name="ProviderName")]
-		public string ProviderName { get; set; } 
+		public string Topic { get; set; } 
 		/// <summary>
 		/// The NF provider identifier.
 		/// </summary>