diff --git a/api/arkui/stateManagement/decorator.static.d.ets b/api/arkui/stateManagement/decorator.static.d.ets
index b45e0590605f6647aab6cab21ee203221c9929be..cc645f1cf26a9087703818d3bd9f608c8510ffab 100644
--- a/api/arkui/stateManagement/decorator.static.d.ets
+++ b/api/arkui/stateManagement/decorator.static.d.ets
@@ -1241,14 +1241,6 @@ export declare interface ISubscribedWatches extends IWatchSubscriberRegister {
   executeOnSubscribingWatches(propertyName: string): void;
 }
 
-export declare interface AbstractProperty<T> extends IDecoratedMutableVariable<T> {
-    info(): string;
-}
-
-export declare interface SubscribedAbstractProperty<T> extends AbstractProperty<T> {
-    aboutToBeDeleted(): void;
-}
-
 /**
  * Defines Computed decoration variable interface.
  *
diff --git a/api/arkui/stateManagement/storage/appStorage.static.d.ets b/api/arkui/stateManagement/storage/appStorage.static.d.ets
index fd4177082a99a33786a56455f8425c53140f23f1..52e2ad08fc6c4aa558b0845e9ddef9f0ea81712e 100644
--- a/api/arkui/stateManagement/storage/appStorage.static.d.ets
+++ b/api/arkui/stateManagement/storage/appStorage.static.d.ets
@@ -21,4 +21,11 @@
 
 import { LocalStorage } from './localStorage';
 
-export const AppStorage: LocalStorage = new LocalStorage();
+/**
+AppStorage singleton is sub-class of see LocalStorage for
+UI state of app-wide access and same life cycle as the app.
+@type { LocalStorage }
+@syscap SystemCapability.ArkUI.ArkUI.Full
+@since 20
+*/
+export declare const AppStorage: LocalStorage;