diff --git a/Constants/XAiModelsConstants.cs b/Constants/XAiModelsConstants.cs
index b8fd8e5..50cc25e 100644
--- a/Constants/XAiModelsConstants.cs
+++ b/Constants/XAiModelsConstants.cs
@@ -13,11 +13,22 @@ namespace xAiModels.Constants
         public const string XAiMessageSingleName = "aiMessage";
         public const string XAiProjectSingleName = "aiProject";
         public const string XAiConversationSignleName = "aiConversation";
-        
+
         public const string XAiMessageCollectionName = "aiMessages";
         public const string XAiProjectCollectionName = "AiProjectsa";
         public const string XAiConversationCollectionName = "aiConversations";
 
+        //
+        // Hubs ...
+        public const string XAiMessageDtoHub = "aiMessageDto";
+        public const string XAiMessageEntityHub = "aiMessageEntity";
+
+        public const string XAiProjectDtoHub = "aiProjectDto";
+        public const string XAiProjectEntityHub = "aiProjectEntity";
+
+        public const string XAiConversationDtoHub = "aiConversationDto";
+        public const string XAiConversationEntityHub = "aiConversationEntity";
+
         //
         // Resource Provider Identifiers ...
         public const string XAiProjectTitleIdentifier = "AiPrjT";