diff --git a/src/Glutinum.Converter/GlueAST.fs b/src/Glutinum.Converter/GlueAST.fs
index 7bd5c7f..dd0d17b 100644
--- a/src/Glutinum.Converter/GlueAST.fs
+++ b/src/Glutinum.Converter/GlueAST.fs
@@ -259,6 +259,12 @@ type GlueRecord =
         ValueType: GlueType
     }
 
+[<RequireQualifiedAccess>]
+type GlueUtilityType =
+    | Partial of GlueInterface
+    | Record of GlueRecord
+// | ReadOnly of GlueType
+
 [<RequireQualifiedAccess>]
 type GlueType =
     | Discard
@@ -275,8 +281,6 @@ type GlueType =
     | ModuleDeclaration of GlueModuleDeclaration
     | ClassDeclaration of GlueClassDeclaration
     | TypeReference of GlueTypeReference
-    | Partial of GlueInterface
-    | Record of GlueRecord
     | Array of GlueType
     | FunctionType of GlueFunctionType
     | TypeParameter of string
@@ -289,6 +293,7 @@ type GlueType =
     | Unknown
     | ExportDefault of GlueType
     | TemplateLiteral
+    | UtilityType of GlueUtilityType
 
     member this.Name =
         match this with
@@ -324,11 +329,13 @@ type GlueType =
         | IntersectionType _
         | IndexedAccessType _
         | Union _
-        | Partial _
         | FunctionType _
         | TupleType _
         | OptionalType _ // TODO: Should we take the name of the underlying type and add option to it?
         | Discard
         | ExportDefault _
-        | Record _
         | Unknown -> "obj"
+        | UtilityType utilityType ->
+            match utilityType with
+            | GlueUtilityType.Partial _
+            | GlueUtilityType.Record _ -> "obj"
diff --git a/src/Glutinum.Converter/Reader/TypeNode.fs b/src/Glutinum.Converter/Reader/TypeNode.fs
index 604c4e5..fb9e574 100644
--- a/src/Glutinum.Converter/Reader/TypeNode.fs
+++ b/src/Glutinum.Converter/Reader/TypeNode.fs
@@ -129,7 +129,8 @@ module UtilityType =
                             HeritageClauses = []
                         }
                         : GlueInterface)
-                        |> GlueType.Partial
+                        |> GlueUtilityType.Partial
+                        |> GlueType.UtilityType
 
                     | _ -> GlueType.Discard
 
@@ -144,7 +145,8 @@ module UtilityType =
             ValueType = typeArguments.[1]
         }
         : GlueRecord)
-        |> GlueType.Record
+        |> GlueUtilityType.Record
+        |> GlueType.UtilityType
 
 let readTypeNode
     (reader: ITypeScriptReader)
diff --git a/src/Glutinum.Converter/Transform.fs b/src/Glutinum.Converter/Transform.fs
index a49d4f8..594a382 100644
--- a/src/Glutinum.Converter/Transform.fs
+++ b/src/Glutinum.Converter/Transform.fs
@@ -577,23 +577,6 @@ let rec private transformType
     | GlueType.NamedTupleType namedTupleType ->
         transformType context namedTupleType.Type
 
-    | GlueType.Partial interfaceInfo ->
-        transformInterface context interfaceInfo
-        |> Interface.makePartial context.CurrentScopeName
-        |> FSharpType.Interface
-        |> context.ExposeType
-
-        // Get fullname
-        // Store type in the exposed types memory
-        ({
-            Name = context.FullName
-            FullName = context.FullName
-            TypeArguments = []
-            Type = FSharpType.Discard
-        }
-        : FSharpTypeReference)
-        |> FSharpType.TypeReference
-
     | GlueType.Discard -> FSharpType.Object
 
     | GlueType.Literal glueLiteral ->
@@ -639,15 +622,34 @@ let rec private transformType
             })
             |> FSharpType.Mapped
 
-    | GlueType.Record recordInfo ->
-        transformRecord context context.CurrentScopeName [] recordInfo
-        |> context.ExposeType
+    | GlueType.UtilityType utilityType ->
+        match utilityType with
+        | GlueUtilityType.Partial interfaceInfo ->
+            transformInterface context interfaceInfo
+            |> Interface.makePartial context.CurrentScopeName
+            |> FSharpType.Interface
+            |> context.ExposeType
 
-        ({
-            Name = context.FullName
-            TypeParameters = []
-        })
-        |> FSharpType.Mapped
+            // Get fullname
+            // Store type in the exposed types memory
+            ({
+                Name = context.FullName
+                FullName = context.FullName
+                TypeArguments = []
+                Type = FSharpType.Discard
+            }
+            : FSharpTypeReference)
+            |> FSharpType.TypeReference
+
+        | GlueUtilityType.Record recordInfo ->
+            transformRecord context context.CurrentScopeName [] recordInfo
+            |> context.ExposeType
+
+            ({
+                Name = context.FullName
+                TypeParameters = []
+            })
+            |> FSharpType.Mapped
 
     | GlueType.TypeAliasDeclaration typeAliasDeclaration ->
         ({
@@ -1953,18 +1955,20 @@ let private transformTypeAliasDeclaration
         : FSharpTypeAlias)
         |> FSharpType.TypeAlias
 
-    | GlueType.Partial interfaceInfo ->
-        transformInterface context interfaceInfo
-        // Use the alias name instead of the original interface name
-        |> Interface.makePartial typeAliasName
-        |> FSharpType.Interface
+    | GlueType.UtilityType utilityType ->
+        match utilityType with
+        | GlueUtilityType.Partial interfaceInfo ->
+            transformInterface context interfaceInfo
+            // Use the alias name instead of the original interface name
+            |> Interface.makePartial typeAliasName
+            |> FSharpType.Interface
 
-    | GlueType.Record recordInfo ->
-        transformRecord
-            context
-            typeAliasName
-            glueTypeAliasDeclaration.TypeParameters
-            recordInfo
+        | GlueUtilityType.Record recordInfo ->
+            transformRecord
+                context
+                typeAliasName
+                glueTypeAliasDeclaration.TypeParameters
+                recordInfo
 
     | GlueType.FunctionType functionType ->
         {
@@ -2151,7 +2155,6 @@ let rec private transformToFsharp
 
         | GlueType.FunctionType _
         | GlueType.TypeParameter _
-        | GlueType.Partial _
         | GlueType.Array _
         | GlueType.TypeReference _
         | GlueType.FunctionDeclaration _
@@ -2166,10 +2169,10 @@ let rec private transformToFsharp
         | GlueType.TupleType _
         | GlueType.IntersectionType _
         | GlueType.TypeLiteral _
-        | GlueType.Record _
         | GlueType.OptionalType _
         | GlueType.NamedTupleType _
         | GlueType.TemplateLiteral
+        | GlueType.UtilityType _
         | GlueType.ThisType _ -> FSharpType.Discard
     )
 
diff --git a/src/Glutinum.Web/Pages/Editors.GlueAST.GlueASTViewer.fs b/src/Glutinum.Web/Pages/Editors.GlueAST.GlueASTViewer.fs
index 419c13a..6d69afe 100644
--- a/src/Glutinum.Web/Pages/Editors.GlueAST.GlueASTViewer.fs
+++ b/src/Glutinum.Web/Pages/Editors.GlueAST.GlueASTViewer.fs
@@ -428,28 +428,30 @@ type GlueASTViewer =
                 ]
                 context
 
-        | GlueType.Partial partialInfo ->
-            ASTViewer.renderNode
-                "Partial"
-                [
-                    GlueASTViewer.Name partialInfo.Name
-                    GlueASTViewer.Members partialInfo.Members
-                    GlueASTViewer.TypeParameters partialInfo.TypeParameters
-                ]
-                context
-
-        | GlueType.Record recordInfo ->
-            ASTViewer.renderNode
-                "Record"
-                [
-                    ASTViewer.renderNode "KeyType" [
-                        GlueASTViewer.GlueType recordInfo.KeyType
+        | GlueType.UtilityType utilityType ->
+            match utilityType with
+            | GlueUtilityType.Partial partialInfo ->
+                ASTViewer.renderNode
+                    "Partial"
+                    [
+                        GlueASTViewer.Name partialInfo.Name
+                        GlueASTViewer.Members partialInfo.Members
+                        GlueASTViewer.TypeParameters partialInfo.TypeParameters
                     ]
-                    ASTViewer.renderNode "ValueType" [
-                        GlueASTViewer.GlueType recordInfo.ValueType
+                    context
+
+            | GlueUtilityType.Record recordInfo ->
+                ASTViewer.renderNode
+                    "Record"
+                    [
+                        ASTViewer.renderNode "KeyType" [
+                            GlueASTViewer.GlueType recordInfo.KeyType
+                        ]
+                        ASTViewer.renderNode "ValueType" [
+                            GlueASTViewer.GlueType recordInfo.ValueType
+                        ]
                     ]
-                ]
-                context
+                    context
 
         | GlueType.ThisType typeName ->
             ASTViewer.renderNode