diff --git a/src/Neo.SmartContract.Framework/Native/Role.cs b/src/Neo.SmartContract.Framework/Native/Role.cs
index d32ab12f1..7db361724 100644
--- a/src/Neo.SmartContract.Framework/Native/Role.cs
+++ b/src/Neo.SmartContract.Framework/Native/Role.cs
@@ -10,9 +10,24 @@
 
 namespace Neo.SmartContract.Framework.Native
 {
+    /// <summary>
+    /// Represents the roles in the NEO system.
+    /// </summary>
     public enum Role : byte
     {
+        /// <summary>
+        /// The validators of state. Used to generate and sign the state root.
+        /// </summary>
         StateValidator = 4,
-        Oracle = 8
+
+        /// <summary>
+        /// The nodes used to process Oracle requests.
+        /// </summary>
+        Oracle = 8,
+
+        /// <summary>
+        /// NeoFS Alphabet nodes.
+        /// </summary>
+        NeoFSAlphabetNode = 16
     }
 }