server/AyaNova/biz/AttachableAttribute.cs

@@ -0,0 +1,15 @@
+using System;
+
+namespace AyaNova.Biz
+{
+    /// <summary>
+    /// Marker attribute indicating that an object supports attachments
+    /// Used in <see cref="AyaType"/>
+    /// </summary>
+    [AttributeUsage(AttributeTargets.All)]
+    public class AttachableAttribute : Attribute
+    {
+        //No code required, it's just a marker     
+        //https://docs.microsoft.com/en-us/dotnet/standard/attributes/writing-custom-attributes
+    }
+}//eons