diff --git a/src/Messaging/Common/ExportRequestType.cs b/src/Messaging/Common/ExportRequestType.cs
deleted file mode 100755
index aae8514..0000000
--- a/src/Messaging/Common/ExportRequestType.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-
-namespace Monai.Deploy.Messaging.Common
-{
-    public enum ExportRequestType
-    {
-        None = 0,
-        ExternalProcessing
-    }
-}
diff --git a/src/Messaging/Events/ExportRequestEvent.cs b/src/Messaging/Events/ExportRequestEvent.cs
index 602c036..f6bfef9 100755
--- a/src/Messaging/Events/ExportRequestEvent.cs
+++ b/src/Messaging/Events/ExportRequestEvent.cs
@@ -15,7 +15,6 @@
  */
 
 using System.ComponentModel.DataAnnotations;
-using Monai.Deploy.Messaging.Common;
 using Newtonsoft.Json;
 
 namespace Monai.Deploy.Messaging.Events
@@ -77,13 +76,12 @@ public class ExportRequestEvent : EventBase
         public List<string> ErrorMessages { get; private set; }
 
         /// <summary>
-        /// Gets or set the ExportRequest type.
-        /// For standard exports this will be ExportRequestType.None
-        /// but for exports to external apps this will be ExportRequestType.ExternalProcessing
+        /// A list of data output plug-in type names to be executed by the export services.
+        /// Each string must be a fully-qualified type name.
+        /// E.g. <code>MyCompnay.MyProject.MyNamepsace.MyPlugin, MyCompnay.MyProject.MyNamepsace</code> where
+        /// <code>MyCompnay.MyProject.MyNamepsace</code> is the name of the assembly (DLL).
         /// </summary>
-        [JsonProperty(PropertyName = "export_request")]
-        [Required]
-        public ExportRequestType ExportRequest { get; set; } = default!;
+        public List<string> PluginAssemblies { get; private set; }
 
         public ExportRequestEvent()
         {