diff --git a/frameworks/bridge/declarative_frontend/engine/stateMgmt.js b/frameworks/bridge/declarative_frontend/engine/stateMgmt.js
index e9f565c92f5e2890f1495914cdd6d91f200e2ef4..2daa49f7e3c8cf7ab11e9b0016fbaa94179d7690 100644
--- a/frameworks/bridge/declarative_frontend/engine/stateMgmt.js
+++ b/frameworks/bridge/declarative_frontend/engine/stateMgmt.js
@@ -447,7 +447,7 @@ class LocalStorage extends NativeLocalStorage {
     }
 }
 /*
- * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -472,26 +472,26 @@ class LocalStorage extends NativeLocalStorage {
  */
 class AppStorage extends LocalStorage {
     /** singleton class, app can not create instances
-     *
-     * not a public / sdk function
+    *
+    * not a public / sdk function
     */
     constructor(initializingProperties) {
         super(initializingProperties);
     }
     /**
-     * create and initialize singleton
-     * initialzie with all properties and their values that Object.keys(params) returns
-     * Property values must not be undefined.
-     *
-     * not a public / sdk function
-     */
-    static CreateSingleton(initializingPropersties) {
-        if (!AppStorage.Instance_) {
+    * create and initialize singleton
+    * initialzie with all properties and their values that Object.keys(params) returns
+    * Property values must not be undefined.
+    *
+    * not a public / sdk function
+    */
+    static createSingleton(initializingPropersties) {
+        if (!AppStorage.instance_) {
             
-            AppStorage.Instance_ = new AppStorage(initializingPropersties);
+            AppStorage.instance_ = new AppStorage(initializingPropersties);
         }
         else {
-            stateMgmtConsole.error("AppStorage.CreateNewInstance(..): instance exists already, internal error!");
+            stateMgmtConsole.error("AppStorage.createNewInstance(..): instance exists already, internal error!");
         }
     }
     /**
@@ -500,20 +500,28 @@ class AppStorage extends LocalStorage {
     * Same as @see LocalStorage.link()
     *
     * @param propName name of source property in AppStorage
-     * @param linkUser IPropertySubscriber to be notified when source changes,
-     * @param subscribersName the linkUser (subscriber) uses this name for the property
-     *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-     * @returns  SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as its source.
-     *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
-     *           return undefiend if named property does not already exist in AppStorage
-     *
-     * @since 7
-     */
+    * @param linkUser IPropertySubscriber to be notified when source changes,
+    * @param subscribersName the linkUser (subscriber) uses this name for the property
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
+    *           return undefiend if named property does not already exist in AppStorage
+    *
+    * @since 9
+    */
+    static link(key, linkUser, subscribersName) {
+        return AppStorage.getOrCreate().link(key, linkUser, subscribersName);
+    }
+    /**
+    * @see link
+    * @since 7
+    * @deprecated
+    */
     static Link(key, linkUser, subscribersName) {
-        return AppStorage.GetOrCreate().link(key, linkUser, subscribersName);
+        return AppStorage.getOrCreate().link(key, linkUser, subscribersName);
     }
     /**
-    * Like @see link(), but will create and initialize a new source property in LocalStorge if missing
+    * Like @see link(), but will create and initialize a new source property in LocalStorage if missing
     *
     * Same as @see LocalStorage.setAndLink()
     *
@@ -526,79 +534,121 @@ class AppStorage extends LocalStorage {
     * @returns SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as  its source.
     *          Apps can use SDK functions of base class SubscribedAbstractProperty<S>
     *
+    * @since 9
+    */
+    static setAndLink(key, defaultValue, linkUser, subscribersName) {
+        return AppStorage.getOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
+    }
+    /**
+    * @see setAndLink
     * @since 7
+    * @deprecated
     */
     static SetAndLink(key, defaultValue, linkUser, subscribersName) {
-        return AppStorage.GetOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
+        return AppStorage.getOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
     }
     /**
-   * create and return a one-way sync ('prop') to named property
-   *
-   * Same as @see LocalStorage.prop()
-   *
-   * @param propName name of source property in AppStorage
-   * @param propUser IPropertySubscriber to be notified when source changes,
-   * @param subscribersName the linkUser (subscriber) uses this name for the property
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as  its source.
-   *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
-   *           return undefiend if named property does not already exist in AppStorage.
-   * @since 7
-   */
+    * create and return a one-way sync ('prop') to named property
+    *
+    * Same as @see LocalStorage.prop()
+    *
+    * @param propName name of source property in AppStorage
+    * @param propUser IPropertySubscriber to be notified when source changes,
+    * @param subscribersName the linkUser (subscriber) uses this name for the property
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as  its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
+    *           return undefiend if named property does not already exist in AppStorage.
+    * @since 9
+    */
+    static prop(propName, propUser, subscribersName) {
+        return AppStorage.getOrCreate().prop(propName, propUser, subscribersName);
+    }
+    /**
+    * @see prop
+    * @since 7
+    * @deprecated
+    */
     static Prop(propName, propUser, subscribersName) {
-        return AppStorage.GetOrCreate().prop(propName, propUser, subscribersName);
+        return AppStorage.getOrCreate().prop(propName, propUser, subscribersName);
     }
     /**
-   * Like @see prop(), will create and initialize a new source property in AppStorage if missing
-   *
-   * Same as @see LocalStorage.setAndProp()
-   *
-   * @param propName name of source property in AppStorage
-   * @param defaultValue value to be used for initializing if new creating new property in AppStorage.
-   *        default value must be of type S, must not be undefined or null.
-   * @param propUser IPropertySubscriber to be notified when returned 'prop' changes,
-   * @param subscribersName the propUser (subscriber) uses this name for the property
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as its source.
-   *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
-   *
-   * @since 7
-   */
+    * Like @see prop(), will create and initialize a new source property in AppStorage if missing
+    *
+    * Same as @see LocalStorage.setAndProp()
+    *
+    * @param propName name of source property in AppStorage
+    * @param defaultValue value to be used for initializing if new creating new property in AppStorage.
+    *        default value must be of type S, must not be undefined or null.
+    * @param propUser IPropertySubscriber to be notified when returned 'prop' changes,
+    * @param subscribersName the propUser (subscriber) uses this name for the property
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S>
+    *
+    * @since 9
+    */
+    static setAndProp(key, defaultValue, propUser, subscribersName) {
+        return AppStorage.getOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
+    }
+    /**
+    * @see setAndProp
+    * @since 7
+    * @deprecated
+    */
     static SetAndProp(key, defaultValue, propUser, subscribersName) {
-        return AppStorage.GetOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
+        return AppStorage.getOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
     }
     /**
-     * Check if AppStorge has a property with given name
-     * return true if prooperty with given name exists
-     * same as ES6 Map.prototype.has()
-     *
-     * Same as @see LocalStorage.has()
-     *
-     * @param propName searched property
-     * @returns true if property with such name exists in AppStorage
-     *
-     * @since 7
-     */
+    * Check if AppStorage has a property with given name
+    * return true if property with given name exists
+    * same as ES6 Map.prototype.has()
+    *
+    * Same as @see LocalStorage.has()
+    *
+    * @param propName searched property
+    * @returns true if property with such name exists in AppStorage
+    *
+    * @since 9
+    */
+    static has(key) {
+        return AppStorage.getOrCreate().has(key);
+    }
+    /**
+   * @see has()
+   * @since 7
+   * @deprecated
+   */
     static Has(key) {
-        return AppStorage.GetOrCreate().has(key);
+        return AppStorage.getOrCreate().has(key);
     }
     /**
     * Returns value of given property
     * return undefined if no property with this name
     *
-    *
     * @Same as see LocalStorage.get()
     *
     * @param propName
     * @returns property value if found or undefined
     *
+    * @since 9
+    *
+    */
+    static get(key) {
+        return AppStorage.getOrCreate().get(key);
+    }
+    /**
+    * @see get
+    * @since 7
+    * @deprecated
+    *
     */
     static Get(key) {
-        return AppStorage.GetOrCreate().get(key);
+        return AppStorage.getOrCreate().get(key);
     }
     /**
     * Set value of given property in AppStorage
-    * Methosd sets nothing and returns false if property with this name does not exist
+    * Method sets nothing and returns false if property with this name does not exist
     * or if newValue is `undefined` or `null` (`undefined`, `null` value are not allowed for state variables).
     *
     * Same as @see LocalStorage.set
@@ -607,10 +657,18 @@ class AppStorage extends LocalStorage {
     * @param newValue must be of type T and must not be undefined or null
     * @returns true on success, i.e. when above conditions are satisfied, otherwise false
     *
+    * @since 9
+    */
+    static set(key, newValue) {
+        return AppStorage.getOrCreate().set(key, newValue);
+    }
+    /**
+    * @see set
     * @since 7
+    * @deprecated
     */
     static Set(key, newValue) {
-        return AppStorage.GetOrCreate().set(key, newValue);
+        return AppStorage.getOrCreate().set(key, newValue);
     }
     /**
    * Set value of given property, if it exists, @see set() .
@@ -624,35 +682,51 @@ class AppStorage extends LocalStorage {
    * @param newValue must be of type T and must not be undefined or null
    * @returns true on success, i.e. when above conditions are satisfied, otherwise false
    *
-   * @since 7
+   * @since 9
    */
+    static setOrCreate(key, newValue) {
+        AppStorage.getOrCreate().setOrCreate(key, newValue);
+    }
+    /**
+    * @see setOrCreate
+    * @since 7
+    * @deprecated
+    */
     static SetOrCreate(key, newValue) {
-        AppStorage.GetOrCreate().setOrCreate(key, newValue);
+        AppStorage.getOrCreate().setOrCreate(key, newValue);
     }
     /**
-     * Delete property from StorageBase
-     * Use with caution:
-     * Before deleting a prop from AppStorage all its subscribers need to
-     * unsubscribe from the property.
-     * This method fails and returns false if given property still has subscribers
-     * Another reason for failing is unkmown property.
-     *
-     * Developer advise:
-     * Subscribers are created with @see link(), @see prop()
-     * and also via @LocalStorageLink and @LocalStorageProp state variable decorators.
-     * That means as long as their is a @Component instance that uses such decorated variable
-     * or a sync relationship with a SubscribedAbstractProperty variable the property can nit
-     * (and also should not!) be deleted from AppStorage.
-     *
-     * Same as @see LocalStorage.delete()
-     *
-     * @param propName
-     * @returns false if method failed
-     *
-     * @since 7
+    * Delete property from StorageBase
+    * Use with caution:
+    * Before deleting a prop from AppStorage all its subscribers need to
+    * unsubscribe from the property.
+    * This method fails and returns false if given property still has subscribers
+    * Another reason for failing is unkmown property.
+    *
+    * Developer advise:
+    * Subscribers are created with @see link(), @see prop()
+    * and also via @LocalStorageLink and @LocalStorageProp state variable decorators.
+    * That means as long as their is a @Component instance that uses such decorated variable
+    * or a sync relationship with a SubscribedAbstractProperty variable the property can nit
+    * (and also should not!) be deleted from AppStorage.
+    *
+    * Same as @see LocalStorage.delete()
+    *
+    * @param propName
+    * @returns false if method failed
+    *
+    * @since 9
+    */
+    static delete(key) {
+        return AppStorage.getOrCreate().delete(key);
+    }
+    /**
+    * @see delete
+    * @since 7
+    * @deprecated
     */
     static Delete(key) {
-        return AppStorage.GetOrCreate().delete(key);
+        return AppStorage.getOrCreate().delete(key);
     }
     /**
     * Provide names of all properties in AppStorage
@@ -662,53 +736,77 @@ class AppStorage extends LocalStorage {
     *
     * @returns return a Map Iterator
     *
-    * @since 7
+    * @since 9
    */
+    static keys() {
+        return AppStorage.getOrCreate().keys();
+    }
+    /**
+    * @see keys
+    * @since 7
+    * @deprecated
+    */
     static Keys() {
-        return AppStorage.GetOrCreate().keys();
+        return AppStorage.getOrCreate().keys();
     }
     /**
-     * Returns number of properties in AppStorage
-     * same as Map.prototype.size()
-     *
-     * Same as @see LocalStorage.size()
-     *
-     * @param propName
-     * @returns return number of properties
-     *
-     * @since 7
-     */
+    * Returns number of properties in AppStorage
+    * same as Map.prototype.size()
+    *
+    * Same as @see LocalStorage.size()
+    *
+    * @param propName
+    * @returns return number of properties
+    *
+    * @since 9
+    */
+    static size() {
+        return AppStorage.getOrCreate().size();
+    }
+    /**
+    * @see size
+    * @since 7
+    * @deprecated
+    */
     static Size() {
-        return AppStorage.GetOrCreate().size();
+        return AppStorage.getOrCreate().size();
     }
     /**
-     * delete all properties from the AppStorage
-     *
-     * @see delete(), same as @see LocalStorage.clear()
-     *
-     * precondition is that there are no subscribers.
-     * method returns false and deletes no poperties if there is any property
-     * that still has subscribers
-     *
-     * @since 7
-     */
+    * delete all properties from the AppStorage
+    *
+    * @see delete(), same as @see LocalStorage.clear()
+    *
+    * precondition is that there are no subscribers.
+    * method returns false and deletes no poperties if there is any property
+    * that still has subscribers
+    *
+    * @since 9
+    */
+    static clear() {
+        return AppStorage.getOrCreate().clear();
+    }
+    /**
+    * @see clear
+    * @since 7
+    * @deprecated
+    */
     static Clear() {
-        return AppStorage.GetOrCreate().clear();
+        return AppStorage.getOrCreate().clear();
     }
     /**
-     * Same as @see Clear().
-     *
-     * @since 7, depreciated, used Clear() instead!
-     *
-     */
+    * Same as @see clear().
+    *
+    * @since 7, deprecated, used clear() instead!
+    *
+    */
     static StaticClear() {
-        return AppStorage.Clear();
+        return AppStorage.clear();
     }
     /**
     * not a public / sdk function
     */
-    static AboutToBeDeleted() {
-        AppStorage.GetOrCreate().aboutToBeDeleted();
+    static aboutToBeDeleted() {
+        AppStorage.getOrCreate().aboutToBeDeleted();
     }
     /**
      * return number of subscribers to named property
@@ -716,8 +814,8 @@ class AppStorage extends LocalStorage {
      *
      * not a public / sdk function
     */
-    static NumberOfSubscribersTo(propName) {
-        return AppStorage.GetOrCreate().numberOfSubscrbersTo(propName);
+    static numberOfSubscribersTo(propName) {
+        return AppStorage.getOrCreate().numberOfSubscrbersTo(propName);
     }
     /**
     * Subscribe to value change notifications of named property
@@ -732,52 +830,68 @@ class AppStorage extends LocalStorage {
     * @param subscriber object that implements ISinglePropertyChangeSubscriber interface
     * @returns false if named property does not exist
     *
+    * @since 9
+    */
+    static subscribeToChangesOf(propName, subscriber) {
+        return AppStorage.getOrCreate().subscribeToChangesOf(propName, subscriber);
+    }
+    /**
+    * @see subscribeToChangesOf
     * @since 7
+    * @deprecated
     */
     static SubscribeToChangesOf(propName, subscriber) {
-        return AppStorage.GetOrCreate().subscribeToChangesOf(propName, subscriber);
+        return AppStorage.getOrCreate().subscribeToChangesOf(propName, subscriber);
     }
     /**
-     * inverse of @see SubscribeToChangesOf,
-     * same as @see LocalStorage.subscribeToChangesOf()
-     *
-     * @param propName property in AppStorage to subscribe to
-     * @param subscriberId id of the subscrber passed to @see subscribeToChangesOf
-     * @returns false if named property does not exist
-     *
-     * @since 7
-     */
+    * inverse of @see SubscribeToChangesOf,
+    * same as @see LocalStorage.subscribeToChangesOf()
+    *
+    * @param propName property in AppStorage to subscribe to
+    * @param subscriberId id of the subscrber passed to @see subscribeToChangesOf
+    * @returns false if named property does not exist
+    *
+    * @since 9
+    */
+    static unsubscribeFromChangesOf(propName, subscriberId) {
+        return AppStorage.getOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
+    }
+    /**
+    * @see unsubscribeFromChangesOf
+    * @since 7
+    * @deprecated
+    */
     static UnsubscribeFromChangesOf(propName, subscriberId) {
-        return AppStorage.GetOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
+        return AppStorage.getOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
     }
     /**
-     * Unimplemenrted, currently all properties of AppStorage are mutable.
+     * Unimplemented, currently all properties of AppStorage are mutable.
      *
-     * @since 7, depreciated
+     * @since 7, deprecated
      */
     static IsMutable(key) {
         return true;
     }
     /**
-     * not a public / sdk function
-     */
-    static __CreateSync(storagePropName, defaultValue, factoryFunc) {
-        return AppStorage.GetOrCreate().__createSync(storagePropName, defaultValue, factoryFunc);
+    * not a public / sdk function
+    */
+    static __createSync(storagePropName, defaultValue, factoryFunc) {
+        return AppStorage.getOrCreate().__createSync(storagePropName, defaultValue, factoryFunc);
     }
     /**
-     * not a public / sdk function
-     */
-    static GetOrCreate() {
-        if (!AppStorage.Instance_) {
-            stateMgmtConsole.warn("AppStorage instance missing. Use AppStorage.CreateInstance(initObj). Creating instance without any initialization.");
-            AppStorage.Instance_ = new AppStorage({});
+    * not a public / sdk function
+    */
+    static getOrCreate() {
+        if (!AppStorage.instance_) {
+            stateMgmtConsole.warn("AppStorage instance missing. Use AppStorage.createInstance(initObj). Creating instance without any initialization.");
+            AppStorage.instance_ = new AppStorage({});
         }
-        return AppStorage.Instance_;
+        return AppStorage.instance_;
     }
 }
 // instance functions below:
 // Should all be protected, but TS lang does not allow access from static member to protected member
-AppStorage.Instance_ = undefined;
+AppStorage.instance_ = undefined;
 /*
  * Copyright (c) 2022 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -1142,7 +1256,7 @@ class SubscribaleAbstract {
     }
 }
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -1179,34 +1293,34 @@ class PersistentStorage {
      * internal function, not part of the SDK
      *
      */
-    static ConfigureBackend(storage) {
-        PersistentStorage.Storage_ = storage;
+    static configureBackend(storage) {
+        PersistentStorage.storage_ = storage;
     }
     /**
      * private, use static functions!
      */
-    static GetOrCreate() {
-        if (PersistentStorage.Instance_) {
+    static getOrCreate() {
+        if (PersistentStorage.instance_) {
             // already initialized
-            return PersistentStorage.Instance_;
+            return PersistentStorage.instance_;
         }
-        PersistentStorage.Instance_ = new PersistentStorage();
-        return PersistentStorage.Instance_;
+        PersistentStorage.instance_ = new PersistentStorage();
+        return PersistentStorage.instance_;
     }
     /**
      *
      * internal function, not part of the SDK
      */
-    static AboutToBeDeleted() {
-        if (!PersistentStorage.Instance_) {
+    static aboutToBeDeleted() {
+        if (!PersistentStorage.instance_) {
             return;
         }
-        PersistentStorage.GetOrCreate().aboutToBeDeleted();
-        PersistentStorage.Instance_ = undefined;
+        PersistentStorage.getOrCreate().aboutToBeDeleted();
+        PersistentStorage.instance_ = undefined;
     }
     /**
      * Add property 'key' to AppStorage properties whose current value will be
-     * persistemt.
+     * persistent.
      * If AppStorage does not include this property it will be added and initializes
      * with given value
      *
@@ -1216,30 +1330,51 @@ class PersistentStorage {
      * @param defaultValue If AppStorage does not include this property it will be initialized with this value
      *
      */
+    static persistProp(key, defaultValue) {
+        PersistentStorage.getOrCreate().persistProp(key, defaultValue);
+    }
+    /**
+     * @see persistProp
+     * @deprecated
+     */
     static PersistProp(key, defaultValue) {
-        PersistentStorage.GetOrCreate().persistProp(key, defaultValue);
+        PersistentStorage.getOrCreate().persistProp(key, defaultValue);
     }
     /**
-     * Reverse of @see PersistProp
+     * Reverse of @see persistProp
      * @param key no longer persist the property named key
      *
      * @since 9
      */
+    static deleteProp(key) {
+        PersistentStorage.getOrCreate().deleteProp(key);
+    }
+    /**
+     * @see deleteProp
+     * @deprecated
+     */
     static DeleteProp(key) {
-        PersistentStorage.GetOrCreate().deleteProp(key);
+        PersistentStorage.getOrCreate().deleteProp(key);
     }
     /**
      * Persist given AppStorage properties with given names.
      * If a property does not exist in AppStorage, add it and initialize it with given value
-     * works as @see PersistProp for multiple properties.
+     * works as @see persistProp for multiple properties.
      *
      * @param properties
      *
      * @since 9
      *
      */
+    static persistProps(properties) {
+        PersistentStorage.getOrCreate().persistProps(properties);
+    }
+    /**
+     * @see persistProps
+     * @deprecated
+     */
     static PersistProps(properties) {
-        PersistentStorage.GetOrCreate().persistProps(properties);
+        PersistentStorage.getOrCreate().persistProps(properties);
     }
     /**
      * Inform persisted AppStorage property names
@@ -1247,9 +1382,9 @@ class PersistentStorage {
      *
      * @since 9
      */
-    static Keys() {
+    static keys() {
         let result = [];
-        const it = PersistentStorage.GetOrCreate().keys();
+        const it = PersistentStorage.getOrCreate().keys();
         let val = it.next();
         while (!val.done) {
             result.push(val.value);
@@ -1257,6 +1392,13 @@ class PersistentStorage {
         }
         return result;
     }
+    /**
+     * @see keys
+     * @deprecated
+     */
+    static Keys() {
+        return PersistentStorage.keys();
+    }
     /**
       * This methid offers a way to force writing the property value with given
       * key to persistent storage.
@@ -1270,9 +1412,17 @@ class PersistentStorage {
       * @since 9
       *
       */
+    static notifyHasChanged(propName) {
+        
+        PersistentStorage.storage_.set(propName, PersistentStorage.getOrCreate().links_.get(propName).get());
+    }
+    /**
+     * @see notifyHasChanged
+     * @deprecated
+     */
     static NotifyHasChanged(propName) {
         
-        PersistentStorage.Storage_.set(propName, PersistentStorage.GetOrCreate().links_.get(propName).get());
+        PersistentStorage.storage_.set(propName, PersistentStorage.getOrCreate().links_.get(propName).get());
     }
     keys() {
         return this.links_.keys();
@@ -1281,7 +1431,7 @@ class PersistentStorage {
         if (this.persistProp1(propName, defaultValue)) {
             // persist new prop
             
-            PersistentStorage.Storage_.set(propName, this.links_.get(propName).get());
+            PersistentStorage.storage_.set(propName, this.links_.get(propName).get());
         }
     }
     // helper function to persist a property
@@ -1295,13 +1445,13 @@ class PersistentStorage {
             stateMgmtConsole.warn(`PersistentStorage: persistProp: ${propName} is already persisted`);
             return false;
         }
-        let link = AppStorage.Link(propName, this);
+        let link = AppStorage.link(propName, this);
         if (link) {
             
             this.links_.set(propName, link);
         }
         else {
-            let newValue = PersistentStorage.Storage_.get(propName);
+            let newValue = PersistentStorage.storage_.get(propName);
             let returnValue;
             if (!newValue) {
                 
@@ -1310,7 +1460,7 @@ class PersistentStorage {
             else {
                 returnValue = newValue;
             }
-            link = AppStorage.SetAndLink(propName, returnValue, this);
+            link = AppStorage.setAndLink(propName, returnValue, this);
             this.links_.set(propName, link);
             
         }
@@ -1325,7 +1475,7 @@ class PersistentStorage {
         if (link) {
             link.aboutToBeDeleted();
             this.links_.delete(propName);
-            PersistentStorage.Storage_.delete(propName);
+            PersistentStorage.storage_.delete(propName);
             
         }
         else {
@@ -1335,7 +1485,7 @@ class PersistentStorage {
     write() {
         this.links_.forEach((link, propName, map) => {
             
-            PersistentStorage.Storage_.set(propName, link.get());
+            PersistentStorage.storage_.set(propName, link.get());
         });
     }
     propertyHasChanged(info) {
@@ -1351,16 +1501,16 @@ class PersistentStorage {
         });
         this.links_.clear();
         SubscriberManager.Delete(this.id__());
-        PersistentStorage.Storage_.clear();
+        PersistentStorage.storage_.clear();
     }
     id__() {
         return this.id_;
     }
 }
-PersistentStorage.Instance_ = undefined;
+PersistentStorage.instance_ = undefined;
 ;
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -1382,37 +1532,72 @@ PersistentStorage.Instance_ = undefined;
 class Environment {
     constructor() {
         this.props_ = new Map();
-        Environment.EnvBackend_.onValueChanged(this.onValueChanged.bind(this));
+        Environment.envBackend_.onValueChanged(this.onValueChanged.bind(this));
     }
-    static GetOrCreate() {
-        if (Environment.Instance_) {
+    static getOrCreate() {
+        if (Environment.instance_) {
             // already initialized
-            return Environment.Instance_;
+            return Environment.instance_;
         }
-        Environment.Instance_ = new Environment();
-        return Environment.Instance_;
+        Environment.instance_ = new Environment();
+        return Environment.instance_;
+    }
+    static configureBackend(envBackend) {
+        Environment.envBackend_ = envBackend;
     }
+    /**
+     * @see configureBackend
+     * @deprecated
+     */
     static ConfigureBackend(envBackend) {
-        Environment.EnvBackend_ = envBackend;
+        Environment.envBackend_ = envBackend;
     }
-    static AboutToBeDeleted() {
-        if (!Environment.Instance_) {
+    static aboutToBeDeleted() {
+        if (!Environment.instance_) {
             return;
         }
-        Environment.GetOrCreate().aboutToBeDeleted();
-        Environment.Instance_ = undefined;
+        Environment.getOrCreate().aboutToBeDeleted();
+        Environment.instance_ = undefined;
     }
+    /**
+     * @see aboutToBeDeleted
+     * @deprecated
+     */
+    static AboutToBeDeleted() {
+        Environment.aboutToBeDeleted();
+    }
+    static envProp(key, value) {
+        return Environment.getOrCreate().envProp(key, value);
+    }
+    /**
+     * @see envProp
+     * @deprecated
+     */
     static EnvProp(key, value) {
-        return Environment.GetOrCreate().envProp(key, value);
+        return Environment.getOrCreate().envProp(key, value);
+    }
+    static envProps(props) {
+        Environment.getOrCreate().envProps(props);
     }
+    /**
+     * @see envProps
+     * @deprecated
+     */
     static EnvProps(props) {
-        Environment.GetOrCreate().envProps(props);
+        Environment.getOrCreate().envProps(props);
+    }
+    static keys() {
+        return Environment.getOrCreate().keys();
     }
+    /**
+     * @see keys
+     * @deprecated
+     */
     static Keys() {
-        return Environment.GetOrCreate().keys();
+        return Environment.getOrCreate().keys();
     }
     envProp(key, value) {
-        let prop = AppStorage.Prop(key);
+        let prop = AppStorage.prop(key);
         if (prop) {
             stateMgmtConsole.warn(`Environment: envProp '${key}': Property already exists in AppStorage. Not using environment property.`);
             return false;
@@ -1420,27 +1605,27 @@ class Environment {
         let tmp;
         switch (key) {
             case "accessibilityEnabled":
-                tmp = Environment.EnvBackend_.getAccessibilityEnabled();
+                tmp = Environment.envBackend_.getAccessibilityEnabled();
                 break;
             case "colorMode":
-                tmp = Environment.EnvBackend_.getColorMode();
+                tmp = Environment.envBackend_.getColorMode();
                 break;
             case "fontScale":
-                tmp = Environment.EnvBackend_.getFontScale();
+                tmp = Environment.envBackend_.getFontScale();
                 break;
             case "fontWeightScale":
-                tmp = Environment.EnvBackend_.getFontWeightScale().toFixed(2);
+                tmp = Environment.envBackend_.getFontWeightScale().toFixed(2);
                 break;
             case "layoutDirection":
-                tmp = Environment.EnvBackend_.getLayoutDirection();
+                tmp = Environment.envBackend_.getLayoutDirection();
                 break;
             case "languageCode":
-                tmp = Environment.EnvBackend_.getLanguageCode();
+                tmp = Environment.envBackend_.getLanguageCode();
                 break;
             default:
                 tmp = value;
         }
-        prop = AppStorage.SetAndProp(key, tmp);
+        prop = AppStorage.setAndProp(key, tmp);
         this.props_.set(key, prop);
         
     }
@@ -1461,7 +1646,7 @@ class Environment {
         return result;
     }
     onValueChanged(key, value) {
-        let ok = AppStorage.Set(key, value);
+        let ok = AppStorage.set(key, value);
         if (ok) {
             
         }
@@ -1472,11 +1657,11 @@ class Environment {
     aboutToBeDeleted() {
         this.props_.forEach((val, key, map) => {
             val.aboutToBeDeleted();
-            AppStorage.Delete(key);
+            AppStorage.delete(key);
         });
     }
 }
-Environment.Instance_ = undefined;
+Environment.instance_ = undefined;
 /*
  * Copyright (c) 2022 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -1523,7 +1708,7 @@ class stateMgmtTrace {
     }
 }
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -1571,7 +1756,7 @@ class DistributedStorage {
             stateMgmtConsole.warn(`DistributedStorage: linkProp: ${propName} is already exist`);
             return false;
         }
-        let link = AppStorage.Link(propName, this);
+        let link = AppStorage.link(propName, this);
         if (link) {
             
             this.links_.set(propName, link);
@@ -1589,7 +1774,7 @@ class DistributedStorage {
                     returnValue = newValue;
                 }
             }
-            link = AppStorage.SetAndLink(propName, returnValue, this);
+            link = AppStorage.setAndLink(propName, returnValue, this);
             this.links_.set(propName, link);
             
         }
@@ -3569,7 +3754,7 @@ class SynchedPropertyNesedObjectPU extends ObservedPropertyObjectAbstractPU {
     }
 }
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -4044,14 +4229,14 @@ class ViewPU extends NativeViewPartialUpdate {
        * @returns SynchedPropertySimple/ObjectTwoWay/PU
        */
     createStorageLink(storagePropName, defaultValue, viewVariableName) {
-        return AppStorage.__CreateSync(storagePropName, defaultValue, (source) => (source === undefined)
+        return AppStorage.__createSync(storagePropName, defaultValue, (source) => (source === undefined)
             ? undefined
             : (source instanceof ObservedPropertySimple)
                 ? new SynchedPropertySimpleTwoWayPU(source, this, viewVariableName)
                 : new SynchedPropertyObjectTwoWayPU(source, this, viewVariableName));
     }
     createStorageProp(storagePropName, defaultValue, viewVariableName) {
-        return AppStorage.__CreateSync(storagePropName, defaultValue, (source) => (source === undefined)
+        return AppStorage.__createSync(storagePropName, defaultValue, (source) => (source === undefined)
             ? undefined
             : (source instanceof ObservedPropertySimple)
                 ? new SynchedPropertySimpleOneWayPU(source, this, viewVariableName)
@@ -4153,7 +4338,7 @@ function makeBuilderParameterProxy(builderName, source) {
     }); // new Proxy
 }
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -4167,6 +4352,6 @@ function makeBuilderParameterProxy(builderName, source) {
  * limitations under the License.
  */
 
-PersistentStorage.ConfigureBackend(new Storage());
-Environment.ConfigureBackend(new EnvironmentSetting());
+PersistentStorage.configureBackend(new Storage());
+Environment.configureBackend(new EnvironmentSetting());
 
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/index.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/index.ts
index a60cacb0f8e761c50ed674b5fb0f14c36379e35b..8320b70d921c44070f1dbf0849d0305cf89981e8 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/index.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/index.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -15,7 +15,7 @@
 
 stateMgmtConsole.info("ACE State Management component is initiaizing ...")
 
-PersistentStorage.ConfigureBackend(new Storage());
+PersistentStorage.configureBackend(new Storage());
 
-Environment.ConfigureBackend(new EnvironmentSetting());
+Environment.configureBackend(new EnvironmentSetting());
 
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/common/distributed_storage.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/common/distributed_storage.ts
index 12faff937c99a313917ec43a441fa2163199298e..68c1cdd5641dc17e4e3830d7a5a9e7ba90e56137 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/common/distributed_storage.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/common/distributed_storage.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -65,7 +65,7 @@ class DistributedStorage implements IMultiPropertiesChangeSubscriber {
       stateMgmtConsole.warn(`DistributedStorage: linkProp: ${propName} is already exist`);
         return false;
     }
-    let link = AppStorage.Link(propName, this);
+    let link = AppStorage.link(propName, this);
     if (link) {
       stateMgmtConsole.debug(`DistributedStorage: linkProp ${propName} in AppStorage, using that`);
         this.links_.set(propName, link);
@@ -83,7 +83,7 @@ class DistributedStorage implements IMultiPropertiesChangeSubscriber {
                 returnValue = newValue;
             }
         }
-        link = AppStorage.SetAndLink(propName, returnValue, this);
+        link = AppStorage.setAndLink(propName, returnValue, this);
         this.links_.set(propName, link);
         stateMgmtConsole.debug(`DistributedStorage: created new linkProp prop for ${propName}`);
     }
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/partial_update/pu_view.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/partial_update/pu_view.ts
index fa0bfeb55471d8c41ff94c6b891169269cf2a92b..c33845b867d641ed35ab3cc7513ba1cc4efb0e1c 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/partial_update/pu_view.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/partial_update/pu_view.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -586,7 +586,7 @@ abstract class ViewPU extends NativeViewPartialUpdate
      * @returns SynchedPropertySimple/ObjectTwoWay/PU
      */
   public createStorageLink<T>(storagePropName: string, defaultValue: T, viewVariableName: string): ObservedPropertyAbstractPU<T> {
-    return AppStorage.__CreateSync<T>(storagePropName, defaultValue,
+    return AppStorage.__createSync<T>(storagePropName, defaultValue,
       <T>(source: ObservedPropertyAbstract<T>) => (source === undefined)
         ? undefined
         : (source instanceof ObservedPropertySimple)
@@ -596,7 +596,7 @@ abstract class ViewPU extends NativeViewPartialUpdate
   }
 
   public createStorageProp<T>(storagePropName: string, defaultValue: T, viewVariableName: string): ObservedPropertyAbstractPU<T> {
-    return AppStorage.__CreateSync<T>(storagePropName, defaultValue,
+    return AppStorage.__createSync<T>(storagePropName, defaultValue,
       <T>(source: ObservedPropertyAbstract<T>) => (source === undefined)
         ? undefined
         : (source instanceof ObservedPropertySimple)
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/app_storage.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/app_storage.ts
index c1be4bf6fad75be855f07e4f701b3a970fb00025..f669b6918971f079e3fb7e656115cb44a979b7f6 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/app_storage.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/app_storage.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -25,150 +25,213 @@
  */
 
 class AppStorage extends LocalStorage {
-  /** 
-   * create and initialize singleton 
-   * initialzie with all properties and their values that Object.keys(params) returns
-   * Property values must not be undefined.
-   * 
-   * not a public / sdk function
-   */
-  public static CreateSingleton(initializingPropersties?: Object): void {
-    if (!AppStorage.Instance_) {
-      stateMgmtConsole.debug("Creating AppStorage instance.");
-      AppStorage.Instance_ = new AppStorage(initializingPropersties);
-    } else {
-      stateMgmtConsole.error("AppStorage.CreateNewInstance(..): instance exists already, internal error!")
-    }
-  }
-
-
-  /**
-  * create and return a two-way sync "(link") to named property
-  * 
-  * Same as @see LocalStorage.link() 
-  * 
-  * @param propName name of source property in AppStorage
-   * @param linkUser IPropertySubscriber to be notified when source changes,
-   * @param subscribersName the linkUser (subscriber) uses this name for the property 
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns  SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as its source.
-   *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
-   *           return undefiend if named property does not already exist in AppStorage
-   * 
-   * @since 7
-   */
-  public static Link<T>(key: string, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
-    return AppStorage.GetOrCreate().link(key, linkUser, subscribersName);
-  }
+    /** 
+    * create and initialize singleton 
+    * initialzie with all properties and their values that Object.keys(params) returns
+    * Property values must not be undefined.
+    * 
+    * not a public / sdk function
+    */
+    public static createSingleton(initializingPropersties?: Object): void {
+        if (!AppStorage.instance_) {
+            stateMgmtConsole.debug("Creating AppStorage instance.");
+            AppStorage.instance_ = new AppStorage(initializingPropersties);
+        } else {
+            stateMgmtConsole.error("AppStorage.createNewInstance(..): instance exists already, internal error!")
+        }
+    }
 
 
-   /**
-   * Like @see link(), but will create and initialize a new source property in LocalStorge if missing
-   * 
-   * Same as @see LocalStorage.setAndLink()
-   * 
-   * @param propName name of source property in AppStorage
-   * @param defaultValue value to be used for initializing if new creating new property in AppStorage
-   *        default value must be of type S, must not be undefined or null.
-   * @param linkUser IPropertySubscriber to be notified when return 'link' changes,
-   * @param subscribersName the linkUser (subscriber) uses this name for the property 
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as  its source.
-   *          Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
-   * 
-   * @since 7
-   */
-  public static SetAndLink<T>(key: string, defaultValue: T, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
-    return AppStorage.GetOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
-  }
+    /**
+    * create and return a two-way sync "(link") to named property
+    * 
+    * Same as @see LocalStorage.link() 
+    * 
+    * @param propName name of source property in AppStorage
+    * @param linkUser IPropertySubscriber to be notified when source changes,
+    * @param subscribersName the linkUser (subscriber) uses this name for the property 
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
+    *           return undefiend if named property does not already exist in AppStorage
+    * 
+    * @since 9
+    */
+    public static link<T>(key: string, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().link(key, linkUser, subscribersName);
+    }
 
     /**
-   * create and return a one-way sync ('prop') to named property
-   * 
-   * Same as @see LocalStorage.prop()
-   * 
-   * @param propName name of source property in AppStorage
-   * @param propUser IPropertySubscriber to be notified when source changes,
-   * @param subscribersName the linkUser (subscriber) uses this name for the property 
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as  its source.
-   *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
-   *           return undefiend if named property does not already exist in AppStorage.
-   * @since 7
-   */
-  public static Prop<T>(propName: string, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
-    return AppStorage.GetOrCreate().prop(propName, propUser, subscribersName);
-  }
+    * @see link
+    * @since 7
+    * @deprecated
+    */
+    public static Link<T>(key: string, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().link(key, linkUser, subscribersName);
+    }
 
     /**
-   * Like @see prop(), will create and initialize a new source property in AppStorage if missing
-   * 
-   * Same as @see LocalStorage.setAndProp()
-   * 
-   * @param propName name of source property in AppStorage
-   * @param defaultValue value to be used for initializing if new creating new property in AppStorage.
-   *        default value must be of type S, must not be undefined or null.
-   * @param propUser IPropertySubscriber to be notified when returned 'prop' changes,
-   * @param subscribersName the propUser (subscriber) uses this name for the property 
-   *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
-   * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as its source.
-   *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
-   * 
-   * @since 7
-   */
-  public static SetAndProp<S>(key: string, defaultValue: S, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<S> {
-    return AppStorage.GetOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
-  }
+    * Like @see link(), but will create and initialize a new source property in LocalStorage if missing
+    * 
+    * Same as @see LocalStorage.setAndLink()
+    * 
+    * @param propName name of source property in AppStorage
+    * @param defaultValue value to be used for initializing if new creating new property in AppStorage
+    *        default value must be of type S, must not be undefined or null.
+    * @param linkUser IPropertySubscriber to be notified when return 'link' changes,
+    * @param subscribersName the linkUser (subscriber) uses this name for the property 
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns SynchedPropertyTwoWay{Simple|Object| object with given LocalStoage prop as  its source.
+    *          Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
+    * 
+    * @since 9
+    */
+    public static setAndLink<T>(key: string, defaultValue: T, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
+    }
 
+    /**
+    * @see setAndLink
+    * @since 7
+    * @deprecated
+    */
+    public static SetAndLink<T>(key: string, defaultValue: T, linkUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().setAndLink(key, defaultValue, linkUser, subscribersName);
+    }
 
-  /**
-   * Check if AppStorge has a property with given name
-   * return true if prooperty with given name exists
-   * same as ES6 Map.prototype.has()
-   * 
-   * Same as @see LocalStorage.has()
-   * 
-   * @param propName searched property
-   * @returns true if property with such name exists in AppStorage
-   * 
-   * @since 7
-   */
-  public static Has(key: string): boolean {
-    return AppStorage.GetOrCreate().has(key);
-  }
+    /**
+    * create and return a one-way sync ('prop') to named property
+    * 
+    * Same as @see LocalStorage.prop()
+    * 
+    * @param propName name of source property in AppStorage
+    * @param propUser IPropertySubscriber to be notified when source changes,
+    * @param subscribersName the linkUser (subscriber) uses this name for the property 
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as  its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
+    *           return undefiend if named property does not already exist in AppStorage.
+    * @since 9
+    */
+    public static prop<T>(propName: string, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().prop(propName, propUser, subscribersName);
+    }
 
+    /**
+    * @see prop
+    * @since 7
+    * @deprecated
+    */
+    public static Prop<T>(propName: string, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<T> {
+        return AppStorage.getOrCreate().prop(propName, propUser, subscribersName);
+    }
 
-   /**
-   * Returns value of given property
-   * return undefined if no property with this name
-   * 
-   * 
-   * @Same as see LocalStorage.get()
-   *
-   * @param propName 
-   * @returns property value if found or undefined
-   *
-   */
-  public static Get<T>(key: string): T | undefined {
-    return AppStorage.GetOrCreate().get(key);
-  }
-
-   /**
-   * Set value of given property in AppStorage
-   * Methosd sets nothing and returns false if property with this name does not exist
-   * or if newValue is `undefined` or `null` (`undefined`, `null` value are not allowed for state variables).
-   * 
-   * Same as @see LocalStorage.set
-   * 
-   * @param propName 
-   * @param newValue must be of type T and must not be undefined or null
-   * @returns true on success, i.e. when above conditions are satisfied, otherwise false
-   * 
+    /**
+    * Like @see prop(), will create and initialize a new source property in AppStorage if missing
+    * 
+    * Same as @see LocalStorage.setAndProp()
+    * 
+    * @param propName name of source property in AppStorage
+    * @param defaultValue value to be used for initializing if new creating new property in AppStorage.
+    *        default value must be of type S, must not be undefined or null.
+    * @param propUser IPropertySubscriber to be notified when returned 'prop' changes,
+    * @param subscribersName the propUser (subscriber) uses this name for the property 
+    *      this name will be used in propertyChange(propName) callback of IMultiPropertiesChangeSubscriber
+    * @returns  SynchedPropertyOneWay{Simple|Object| object with given LocalStoage prop as its source.
+    *           Apps can use SDK functions of base class SubscribedAbstractProperty<S> 
+    * 
+    * @since 9
+    */
+    public static setAndProp<S>(key: string, defaultValue: S, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<S> {
+        return AppStorage.getOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
+    }
+
+    /**
+    * @see setAndProp
+    * @since 7
+    * @deprecated
+    */
+    public static SetAndProp<S>(key: string, defaultValue: S, propUser?: IPropertySubscriber, subscribersName?: string): SubscribedAbstractProperty<S> {
+        return AppStorage.getOrCreate().setAndProp(key, defaultValue, propUser, subscribersName);
+    }
+
+
+    /**
+    * Check if AppStorage has a property with given name
+    * return true if property with given name exists
+    * same as ES6 Map.prototype.has()
+    * 
+    * Same as @see LocalStorage.has()
+    * 
+    * @param propName searched property
+    * @returns true if property with such name exists in AppStorage
+    * 
+    * @since 9
+    */
+    public static has(key: string): boolean {
+        return AppStorage.getOrCreate().has(key);
+    }
+
+    /**
+   * @see has()
    * @since 7
+   * @deprecated
    */
-  public static Set<T>(key: string, newValue: T): boolean {
-    return AppStorage.GetOrCreate().set(key, newValue);
-  }
+    public static Has(key: string): boolean {
+        return AppStorage.getOrCreate().has(key);
+    }
+
+    /**
+    * Returns value of given property
+    * return undefined if no property with this name
+    * 
+    * @Same as see LocalStorage.get()
+    *
+    * @param propName 
+    * @returns property value if found or undefined
+    * 
+    * @since 9
+    *
+    */
+    public static get<T>(key: string): T | undefined {
+        return AppStorage.getOrCreate().get(key);
+    }
+
+    /**
+    * @see get
+    * @since 7
+    * @deprecated
+    *
+    */
+    public static Get<T>(key: string): T | undefined {
+        return AppStorage.getOrCreate().get(key);
+    }
+
+    /**
+    * Set value of given property in AppStorage
+    * Method sets nothing and returns false if property with this name does not exist
+    * or if newValue is `undefined` or `null` (`undefined`, `null` value are not allowed for state variables).
+    * 
+    * Same as @see LocalStorage.set
+    * 
+    * @param propName 
+    * @param newValue must be of type T and must not be undefined or null
+    * @returns true on success, i.e. when above conditions are satisfied, otherwise false
+    * 
+    * @since 9
+    */
+    public static set<T>(key: string, newValue: T): boolean {
+        return AppStorage.getOrCreate().set(key, newValue);
+    }
+
+    /**
+    * @see set
+    * @since 7
+    * @deprecated
+    */
+    public static Set<T>(key: string, newValue: T): boolean {
+        return AppStorage.getOrCreate().set(key, newValue);
+    }
 
     /**
    * Set value of given property, if it exists, @see set() .
@@ -182,188 +245,250 @@ class AppStorage extends LocalStorage {
    * @param newValue must be of type T and must not be undefined or null
    * @returns true on success, i.e. when above conditions are satisfied, otherwise false
    * 
-   * @since 7
+   * @since 9
    */
-  public static SetOrCreate<T>(key: string, newValue: T): void {
-    AppStorage.GetOrCreate().setOrCreate(key, newValue);
-  }
-
-  
-  /**
-   * Delete property from StorageBase
-   * Use with caution:
-   * Before deleting a prop from AppStorage all its subscribers need to
-   * unsubscribe from the property. 
-   * This method fails and returns false if given property still has subscribers
-   * Another reason for failing is unkmown property.
-   * 
-   * Developer advise:
-   * Subscribers are created with @see link(), @see prop()
-   * and also via @LocalStorageLink and @LocalStorageProp state variable decorators.
-   * That means as long as their is a @Component instance that uses such decorated variable
-   * or a sync relationship with a SubscribedAbstractProperty variable the property can nit
-   * (and also should not!) be deleted from AppStorage.
-   *
-   * Same as @see LocalStorage.delete()
-   * 
-   * @param propName
-   * @returns false if method failed
-   * 
-   * @since 7
-  */
-  public static Delete(key: string): boolean {
-    return AppStorage.GetOrCreate().delete(key);
-  }
-
-   /**
-   * Provide names of all properties in AppStorage
-   * same as ES6 Map.prototype.keys()
-   * 
-   * Same as @see LocalStorage.keys()
-   * 
-   * @returns return a Map Iterator
-   * 
-   * @since 7
-  */
-  public static Keys(): IterableIterator<string> {
-    return AppStorage.GetOrCreate().keys();
-  }
+    public static setOrCreate<T>(key: string, newValue: T): void {
+        AppStorage.getOrCreate().setOrCreate(key, newValue);
+    }
 
+    /**
+    * @see setOrCreate
+    * @since 7
+    * @deprecated
+    */
+    public static SetOrCreate<T>(key: string, newValue: T): void {
+        AppStorage.getOrCreate().setOrCreate(key, newValue);
+    }
 
-  /**
-   * Returns number of properties in AppStorage
-   * same as Map.prototype.size()
-   * 
-   * Same as @see LocalStorage.size()
-   * 
-   * @param propName 
-   * @returns return number of properties
-   * 
-   * @since 7
-   */
-  public static Size(): number {
-    return AppStorage.GetOrCreate().size();
-  }
 
-  /**
-   * delete all properties from the AppStorage
-   * 
-   * @see delete(), same as @see LocalStorage.clear()
-   * 
-   * precondition is that there are no subscribers.
-   * method returns false and deletes no poperties if there is any property
-   * that still has subscribers
-   * 
-   * @since 7
-   */
-   public static Clear(): boolean {
-    return AppStorage.GetOrCreate().clear();
-  }
-
-  /**
-   * Same as @see Clear().
-   *
-   * @since 7, depreciated, used Clear() instead!
-   *
+    /**
+    * Delete property from StorageBase
+    * Use with caution:
+    * Before deleting a prop from AppStorage all its subscribers need to
+    * unsubscribe from the property. 
+    * This method fails and returns false if given property still has subscribers
+    * Another reason for failing is unkmown property.
+    * 
+    * Developer advise:
+    * Subscribers are created with @see link(), @see prop()
+    * and also via @LocalStorageLink and @LocalStorageProp state variable decorators.
+    * That means as long as their is a @Component instance that uses such decorated variable
+    * or a sync relationship with a SubscribedAbstractProperty variable the property can nit
+    * (and also should not!) be deleted from AppStorage.
+    *
+    * Same as @see LocalStorage.delete()
+    * 
+    * @param propName
+    * @returns false if method failed
+    * 
+    * @since 9
+    */
+    public static delete(key: string): boolean {
+        return AppStorage.getOrCreate().delete(key);
+    }
+
+    /**
+    * @see delete
+    * @since 7
+    * @deprecated
+    */
+    public static Delete(key: string): boolean {
+        return AppStorage.getOrCreate().delete(key);
+    }
+
+    /**
+    * Provide names of all properties in AppStorage
+    * same as ES6 Map.prototype.keys()
+    * 
+    * Same as @see LocalStorage.keys()
+    * 
+    * @returns return a Map Iterator
+    * 
+    * @since 9
    */
-  public static StaticClear(): boolean {
-    return AppStorage.Clear();
-  }
+    public static keys(): IterableIterator<string> {
+        return AppStorage.getOrCreate().keys();
+    }
 
-  /** 
-  * not a public / sdk function
-  */
-  public static AboutToBeDeleted(): void {
-    AppStorage.GetOrCreate().aboutToBeDeleted();
-  }
+    /**
+    * @see keys
+    * @since 7
+    * @deprecated
+    */
+    public static Keys(): IterableIterator<string> {
+        return AppStorage.getOrCreate().keys();
+    }
 
+    /**
+    * Returns number of properties in AppStorage
+    * same as Map.prototype.size()
+    * 
+    * Same as @see LocalStorage.size()
+    * 
+    * @param propName 
+    * @returns return number of properties
+    * 
+    * @since 9
+    */
+    public static size(): number {
+        return AppStorage.getOrCreate().size();
+    }
 
-  /** 
-   * return number of subscribers to named property
-   * useful for debug purposes
-   * 
-   * not a public / sdk function
-  */
-  public static NumberOfSubscribersTo(propName: string): number | undefined {
-    return AppStorage.GetOrCreate().numberOfSubscrbersTo(propName);
-  }
-
-
-   /**
-   * Subscribe to value change notifications of named property
-   * Any object implementing ISinglePropertyChangeSubscriber interface 
-   * and registerign itself to SubscriberManager can register
-   * Caution: do remember to unregister, otherwise the property will block 
-   * cleanup, @see delete() and @see clear() 
-   * 
-   * Same as @see LocalStorage.subscribeToChangesOf()
-   * 
-   * @param propName property in AppStorage to subscribe to
-   * @param subscriber object that implements ISinglePropertyChangeSubscriber interface 
-   * @returns false if named property does not exist
-   * 
-   * @since 7
-   */
-  public static SubscribeToChangesOf<T>(propName: string, subscriber: ISinglePropertyChangeSubscriber<T>): boolean {
-    return AppStorage.GetOrCreate().subscribeToChangesOf(propName, subscriber);
-  }
+    /**
+    * @see size
+    * @since 7
+    * @deprecated
+    */
+    public static Size(): number {
+        return AppStorage.getOrCreate().size();
+    }
 
+    /**
+    * delete all properties from the AppStorage
+    * 
+    * @see delete(), same as @see LocalStorage.clear()
+    * 
+    * precondition is that there are no subscribers.
+    * method returns false and deletes no poperties if there is any property
+    * that still has subscribers
+    * 
+    * @since 9
+    */
+    public static clear(): boolean {
+        return AppStorage.getOrCreate().clear();
+    }
 
-  /**
-   * inverse of @see SubscribeToChangesOf, 
-   * same as @see LocalStorage.subscribeToChangesOf()
-   * 
-   * @param propName property in AppStorage to subscribe to
-   * @param subscriberId id of the subscrber passed to @see subscribeToChangesOf
-   * @returns false if named property does not exist
-   * 
-   * @since 7
-   */
-  public static UnsubscribeFromChangesOf(propName: string, subscriberId: number): boolean {
-    return AppStorage.GetOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
-  }
+    /**
+    * @see clear
+    * @since 7
+    * @deprecated
+    */
+    public static Clear(): boolean {
+        return AppStorage.getOrCreate().clear();
+    }
 
-  /**
-   * Unimplemenrted, currently all properties of AppStorage are mutable.
-   * 
-   * @since 7, depreciated
-   */
-  public static IsMutable(key: string): boolean {
-    return true;
-  }
+    /**
+    * Same as @see clear().
+    *
+    * @since 7, deprecated, used clear() instead!
+    *
+    */
+    public static StaticClear(): boolean {
+        return AppStorage.clear();
+    }
 
-  /**
-   * not a public / sdk function
-   */
+    /** 
+    * not a public / sdk function
+    */
+    public static aboutToBeDeleted(): void {
+        AppStorage.getOrCreate().aboutToBeDeleted();
+    }
 
-  public static __CreateSync<T>(storagePropName: string, defaultValue: T,
-    factoryFunc: SynchedPropertyFactoryFunc): ObservedPropertyAbstract<T> {
-    return AppStorage.GetOrCreate().__createSync(storagePropName, defaultValue, factoryFunc);
-  }
 
-  // instance functions below:
-  // Should all be protected, but TS lang does not allow access from static member to protected member
+    /** 
+     * return number of subscribers to named property
+     * useful for debug purposes
+     * 
+     * not a public / sdk function
+    */
+    public static numberOfSubscribersTo(propName: string): number | undefined {
+        return AppStorage.getOrCreate().numberOfSubscrbersTo(propName);
+    }
 
-  private static Instance_: AppStorage = undefined;
 
-  /**
-   * not a public / sdk function
-   */
-  private static GetOrCreate(): AppStorage {
-    if (!AppStorage.Instance_) {
-      stateMgmtConsole.warn("AppStorage instance missing. Use AppStorage.CreateInstance(initObj). Creating instance without any initialization.");
-      AppStorage.Instance_ = new AppStorage({});
+    /**
+    * Subscribe to value change notifications of named property
+    * Any object implementing ISinglePropertyChangeSubscriber interface 
+    * and registerign itself to SubscriberManager can register
+    * Caution: do remember to unregister, otherwise the property will block 
+    * cleanup, @see delete() and @see clear() 
+    * 
+    * Same as @see LocalStorage.subscribeToChangesOf()
+    * 
+    * @param propName property in AppStorage to subscribe to
+    * @param subscriber object that implements ISinglePropertyChangeSubscriber interface 
+    * @returns false if named property does not exist
+    * 
+    * @since 9
+    */
+    public static subscribeToChangesOf<T>(propName: string, subscriber: ISinglePropertyChangeSubscriber<T>): boolean {
+        return AppStorage.getOrCreate().subscribeToChangesOf(propName, subscriber);
     }
-    return AppStorage.Instance_;
-  }
 
-  /** singleton class, app can not create instances 
-   * 
-   * not a public / sdk function
-  */
-  protected constructor(initializingProperties: Object) {
-    super(initializingProperties);
-  }
+
+    /**
+    * @see subscribeToChangesOf
+    * @since 7
+    * @deprecated
+    */
+    public static SubscribeToChangesOf<T>(propName: string, subscriber: ISinglePropertyChangeSubscriber<T>): boolean {
+        return AppStorage.getOrCreate().subscribeToChangesOf(propName, subscriber);
+    }
+
+    /**
+    * inverse of @see SubscribeToChangesOf, 
+    * same as @see LocalStorage.subscribeToChangesOf()
+    * 
+    * @param propName property in AppStorage to subscribe to
+    * @param subscriberId id of the subscrber passed to @see subscribeToChangesOf
+    * @returns false if named property does not exist
+    * 
+    * @since 9
+    */
+    public static unsubscribeFromChangesOf(propName: string, subscriberId: number): boolean {
+        return AppStorage.getOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
+    }
+
+    /**
+    * @see unsubscribeFromChangesOf
+    * @since 7
+    * @deprecated
+    */
+    public static UnsubscribeFromChangesOf(propName: string, subscriberId: number): boolean {
+        return AppStorage.getOrCreate().unsubscribeFromChangesOf(propName, subscriberId);
+    }
+
+    /**
+     * Unimplemented, currently all properties of AppStorage are mutable.
+     * 
+     * @since 7, deprecated
+     */
+    public static IsMutable(key: string): boolean {
+        return true;
+    }
+
+    /**
+    * not a public / sdk function
+    */
+
+    public static __createSync<T>(storagePropName: string, defaultValue: T,
+        factoryFunc: SynchedPropertyFactoryFunc): ObservedPropertyAbstract<T> {
+        return AppStorage.getOrCreate().__createSync(storagePropName, defaultValue, factoryFunc);
+    }
+
+    // instance functions below:
+    // Should all be protected, but TS lang does not allow access from static member to protected member
+
+    private static instance_: AppStorage = undefined;
+
+    /**
+    * not a public / sdk function
+    */
+    private static getOrCreate(): AppStorage {
+        if (!AppStorage.instance_) {
+            stateMgmtConsole.warn("AppStorage instance missing. Use AppStorage.createInstance(initObj). Creating instance without any initialization.");
+            AppStorage.instance_ = new AppStorage({});
+        }
+        return AppStorage.instance_;
+    }
+
+    /** singleton class, app can not create instances 
+    * 
+    * not a public / sdk function
+    */
+    protected constructor(initializingProperties: Object) {
+        super(initializingProperties);
+    }
 }
 
 
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/environment.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/environment.ts
index 84e56b0e39dea31f75c490b77373c4f38f0ad4ea..f2185147fcd28fbae31607e0112759f1eef39d9b 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/environment.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/environment.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -21,57 +21,102 @@
  */
 
 class Environment {
-  private static Instance_: Environment = undefined;
-  private static EnvBackend_: IEnvironmentBackend;
+  private static instance_: Environment = undefined;
+  private static envBackend_: IEnvironmentBackend;
   private props_: Map<string, SubscribedAbstractProperty<any>>;
 
-  private static GetOrCreate(): Environment {
-    if (Environment.Instance_) {
+  private static getOrCreate(): Environment {
+    if (Environment.instance_) {
       // already initialized
-      return Environment.Instance_;
+      return Environment.instance_;
     }
 
-    Environment.Instance_ = new Environment();
-    return Environment.Instance_;
+    Environment.instance_ = new Environment();
+    return Environment.instance_;
   }
 
+  public static configureBackend(envBackend: IEnvironmentBackend): void {
+    Environment.envBackend_ = envBackend;
+  }
+
+  /**
+   * @see configureBackend
+   * @deprecated
+   */
   public static ConfigureBackend(envBackend: IEnvironmentBackend): void {
-    Environment.EnvBackend_ = envBackend;
+    Environment.envBackend_ = envBackend;
   }
 
-  public static AboutToBeDeleted(): void {
-    if (!Environment.Instance_) {
+
+  public static aboutToBeDeleted(): void {
+    if (!Environment.instance_) {
       return;
     }
 
-    Environment.GetOrCreate().aboutToBeDeleted();
-    Environment.Instance_ = undefined;
+    Environment.getOrCreate().aboutToBeDeleted();
+    Environment.instance_ = undefined;
+  }
+
+  /**
+   * @see aboutToBeDeleted
+   * @deprecated
+   */
+  public static AboutToBeDeleted(): void {
+    Environment.aboutToBeDeleted();
+  }
+
+  public static envProp<S>(key: string, value: S): boolean {
+    return Environment.getOrCreate().envProp<S>(key, value);
   }
 
+  /**
+   * @see envProp
+   * @deprecated
+   */
   public static EnvProp<S>(key: string, value: S): boolean {
-    return Environment.GetOrCreate().envProp<S>(key, value);
+    return Environment.getOrCreate().envProp<S>(key, value);
   }
 
+  public static envProps(props: {
+    key: string,
+    defaultValue: any
+  }[]
+  ): void {
+    Environment.getOrCreate().envProps(props);
+  }
+
+  /**
+   * @see envProps
+   * @deprecated
+   */
   public static EnvProps(props: {
     key: string,
     defaultValue: any
   }[]
   ): void {
-    Environment.GetOrCreate().envProps(props);
+    Environment.getOrCreate().envProps(props);
+  }
+
+  static keys(): Array<string> {
+    return Environment.getOrCreate().keys();
   }
 
+  /**
+   * @see keys
+   * @deprecated
+   */
   static Keys(): Array<string> {
-    return Environment.GetOrCreate().keys();
+    return Environment.getOrCreate().keys();
   }
 
   private constructor() {
     this.props_ = new Map<string, ObservedPropertyAbstract<any>>();
 
-    Environment.EnvBackend_.onValueChanged(this.onValueChanged.bind(this));
+    Environment.envBackend_.onValueChanged(this.onValueChanged.bind(this));
   }
 
   private envProp<S>(key: string, value: S): boolean {
-    let prop = AppStorage.Prop(key);
+    let prop = AppStorage.prop(key);
     if (prop) {
       stateMgmtConsole.warn(`Environment: envProp '${key}': Property already exists in AppStorage. Not using environment property.`);
       return false;
@@ -79,27 +124,27 @@ class Environment {
     let tmp;
     switch(key) {
       case "accessibilityEnabled":
-        tmp = Environment.EnvBackend_ .getAccessibilityEnabled();
+        tmp = Environment.envBackend_ .getAccessibilityEnabled();
         break;
       case "colorMode":
-        tmp = Environment.EnvBackend_ .getColorMode();
+        tmp = Environment.envBackend_ .getColorMode();
         break;
       case "fontScale":
-        tmp = Environment.EnvBackend_ .getFontScale();
+        tmp = Environment.envBackend_ .getFontScale();
         break;
       case "fontWeightScale":
-        tmp = Environment.EnvBackend_ .getFontWeightScale().toFixed(2);
+        tmp = Environment.envBackend_ .getFontWeightScale().toFixed(2);
         break;
       case "layoutDirection":
-        tmp = Environment.EnvBackend_ .getLayoutDirection();
+        tmp = Environment.envBackend_ .getLayoutDirection();
         break;
       case "languageCode":
-        tmp = Environment.EnvBackend_ .getLanguageCode();
+        tmp = Environment.envBackend_ .getLanguageCode();
         break;
       default:
         tmp = value;
     }
-    prop = AppStorage.SetAndProp(key, tmp);
+    prop = AppStorage.setAndProp(key, tmp);
     this.props_.set(key, prop);
     stateMgmtConsole.debug(`Environment: envProp for '${key}' done.`);
   }
@@ -128,7 +173,7 @@ class Environment {
   }
 
   onValueChanged(key: string, value: any): void {
-    let ok = AppStorage.Set(key, value);
+    let ok = AppStorage.set(key, value);
     if (ok) {
       stateMgmtConsole.debug(`Environment: onValueChanged: ${key} changed to ${value}`);
     } else {
@@ -139,7 +184,7 @@ class Environment {
   aboutToBeDeleted() {
     this.props_.forEach((val, key, map) => {
       val.aboutToBeDeleted();
-      AppStorage.Delete(key);
+      AppStorage.delete(key);
     });
   }
 }
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/persistent_storage.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/persistent_storage.ts
index ac7e903c722a239a214b9eeb42044da155ea1301..a7d69a7130ce27ba2e8730aa97a06ebc840e677a 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/persistent_storage.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/lib/sdk/persistent_storage.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -22,8 +22,8 @@
  */
 
 class PersistentStorage implements IMultiPropertiesChangeSubscriber {
-  private static Storage_: IStorage;
-  private static Instance_: PersistentStorage = undefined;
+  private static storage_: IStorage;
+  private static instance_: PersistentStorage = undefined;
 
   private id_: number;
   private links_: Map<string, SubscribedAbstractProperty<any>>;
@@ -36,40 +36,40 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
    * internal function, not part of the SDK
    *
    */
-  public static ConfigureBackend(storage: IStorage): void {
-    PersistentStorage.Storage_ = storage;
+  public static configureBackend(storage: IStorage): void {
+    PersistentStorage.storage_ = storage;
   }
 
   /**
    * private, use static functions!
    */
-  private static GetOrCreate(): PersistentStorage {
-    if (PersistentStorage.Instance_) {
+  private static getOrCreate(): PersistentStorage {
+    if (PersistentStorage.instance_) {
       // already initialized
-      return PersistentStorage.Instance_;
+      return PersistentStorage.instance_;
     }
 
-    PersistentStorage.Instance_ = new PersistentStorage();
-    return PersistentStorage.Instance_;
+    PersistentStorage.instance_ = new PersistentStorage();
+    return PersistentStorage.instance_;
   }
 
   /**
    * 
    * internal function, not part of the SDK
    */
-  public static AboutToBeDeleted(): void {
-    if (!PersistentStorage.Instance_) {
+  public static aboutToBeDeleted(): void {
+    if (!PersistentStorage.instance_) {
       return;
     }
 
-    PersistentStorage.GetOrCreate().aboutToBeDeleted();
-    PersistentStorage.Instance_ = undefined;
+    PersistentStorage.getOrCreate().aboutToBeDeleted();
+    PersistentStorage.instance_ = undefined;
   }
 
 
   /**
    * Add property 'key' to AppStorage properties whose current value will be 
-   * persistemt.
+   * persistent.
    * If AppStorage does not include this property it will be added and initializes 
    * with given value
    * 
@@ -79,35 +79,63 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
    * @param defaultValue If AppStorage does not include this property it will be initialized with this value
    * 
    */
+  public static persistProp<T>(key: string, defaultValue: T): void {
+    PersistentStorage.getOrCreate().persistProp(key, defaultValue);
+  }
+
+  /**
+   * @see persistProp
+   * @deprecated
+   */
   public static PersistProp<T>(key: string, defaultValue: T): void {
-    PersistentStorage.GetOrCreate().persistProp(key, defaultValue);
+    PersistentStorage.getOrCreate().persistProp(key, defaultValue);
   }
 
+
   /**
-   * Reverse of @see PersistProp
+   * Reverse of @see persistProp
    * @param key no longer persist the property named key
    * 
    * @since 9
    */
+  public static deleteProp(key: string): void {
+    PersistentStorage.getOrCreate().deleteProp(key);
+  }
+
+  /**
+   * @see deleteProp
+   * @deprecated
+   */
   public static DeleteProp(key: string): void {
-    PersistentStorage.GetOrCreate().deleteProp(key);
+    PersistentStorage.getOrCreate().deleteProp(key);
   }
 
   /**
    * Persist given AppStorage properties with given names.
    * If a property does not exist in AppStorage, add it and initialize it with given value
-   * works as @see PersistProp for multiple properties.
+   * works as @see persistProp for multiple properties.
    * 
    * @param properties 
    * 
    * @since 9
    * 
    */
+  public static persistProps(properties: {
+    key: string,
+    defaultValue: any
+  }[]): void {
+    PersistentStorage.getOrCreate().persistProps(properties);
+  }
+
+  /**
+   * @see persistProps
+   * @deprecated
+   */
   public static PersistProps(properties: {
     key: string,
     defaultValue: any
   }[]): void {
-    PersistentStorage.GetOrCreate().persistProps(properties);
+    PersistentStorage.getOrCreate().persistProps(properties);
   }
 
   /**
@@ -116,9 +144,9 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
    * 
    * @since 9
    */
-  public static Keys(): Array<string> {
+  public static keys(): Array<string> {
     let result = [];
-    const it = PersistentStorage.GetOrCreate().keys();
+    const it = PersistentStorage.getOrCreate().keys();
     let val = it.next();
 
     while (!val.done) {
@@ -129,6 +157,14 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
     return result;
   }
 
+  /**
+   * @see keys
+   * @deprecated
+   */
+  public static Keys(): Array<string> {
+    return PersistentStorage.keys();
+  }
+
 /**
   * This methid offers a way to force writing the property value with given
   * key to persistent storage.
@@ -142,12 +178,24 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
   * @since 9
   * 
   */
- public static NotifyHasChanged(propName: string) {
+  public static notifyHasChanged(propName: string) {
   stateMgmtConsole.debug(`PersistentStorage: force writing '${propName}'-
-      '${PersistentStorage.GetOrCreate().links_.get(propName)}' to storage`);
-  PersistentStorage.Storage_.set(propName,
-    PersistentStorage.GetOrCreate().links_.get(propName).get());
-}
+      '${PersistentStorage.getOrCreate().links_.get(propName)}' to storage`);
+  PersistentStorage.storage_.set(propName,
+    PersistentStorage.getOrCreate().links_.get(propName).get());
+  }
+
+ /**
+  * @see notifyHasChanged
+  * @deprecated
+  */
+  public static NotifyHasChanged(propName: string) {
+    stateMgmtConsole.debug(`PersistentStorage: force writing '${propName}'-
+        '${PersistentStorage.getOrCreate().links_.get(propName)}' to storage`);
+    PersistentStorage.storage_.set(propName,
+      PersistentStorage.getOrCreate().links_.get(propName).get());
+  }
+
   /**
    * all following methods are framework internal
    */
@@ -166,7 +214,7 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
     if (this.persistProp1(propName, defaultValue)) {
       // persist new prop
       stateMgmtConsole.debug(`PersistentStorage: writing '${propName}' - '${this.links_.get(propName)}' to storage`);
-      PersistentStorage.Storage_.set(propName, this.links_.get(propName).get());
+      PersistentStorage.storage_.set(propName, this.links_.get(propName).get());
     }
   }
 
@@ -184,12 +232,12 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
       return false;
     }
 
-    let link = AppStorage.Link(propName, this);
+    let link = AppStorage.link(propName, this);
     if (link) {
       stateMgmtConsole.debug(`PersistentStorage: persistProp ${propName} in AppStorage, using that`);
       this.links_.set(propName, link);
     } else {
-      let newValue: T = PersistentStorage.Storage_.get(propName);
+      let newValue: T = PersistentStorage.storage_.get(propName);
       let returnValue: T;
       if (!newValue) {
         stateMgmtConsole.debug(`PersistentStorage: no entry for ${propName}, will initialize with default value`);
@@ -198,7 +246,7 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
       else {
         returnValue = newValue;
       }
-      link = AppStorage.SetAndLink(propName, returnValue, this);
+      link = AppStorage.setAndLink(propName, returnValue, this);
       this.links_.set(propName, link);
       stateMgmtConsole.debug(`PersistentStorage: created new persistent prop for ${propName}`);
     }
@@ -218,7 +266,7 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
     if (link) {
       link.aboutToBeDeleted();
       this.links_.delete(propName);
-      PersistentStorage.Storage_.delete(propName);
+      PersistentStorage.storage_.delete(propName);
       stateMgmtConsole.debug(`PersistentStorage: deleteProp: no longer persisting '${propName}'.`);
     } else {
       stateMgmtConsole.warn(`PersistentStorage: '${propName}' is not a persisted property warning.`);
@@ -228,7 +276,7 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
   private write(): void {
     this.links_.forEach((link, propName, map) => {
       stateMgmtConsole.debug(`PersistentStorage: writing ${propName} to storage`);
-      PersistentStorage.Storage_.set(propName, link.get());
+      PersistentStorage.storage_.set(propName, link.get());
     });
   }
 
@@ -247,7 +295,7 @@ class PersistentStorage implements IMultiPropertiesChangeSubscriber {
 
     this.links_.clear();
     SubscriberManager.Delete(this.id__());
-    PersistentStorage.Storage_.clear();
+    PersistentStorage.storage_.clear();
   }
 
   public id__(): number {
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_array_test.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_array_test.ts
index a2fd86c864a2ed58bb9390e680bacb739b0e7c3a..90e493e3c6aa40f36a6f0567a0710334b496b960 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_array_test.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_array_test.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -20,7 +20,7 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
     private id_: number = SubscriberManager. MakeId();
 
     constructor() {
-      AppStorage.SubscribeToChangesOf("arr", this);
+      AppStorage.subscribeToChangesOf("arr", this);
       SubscriberManager.Add(this);
     }
 
@@ -33,7 +33,7 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
     // that the subscriber is about to be deleted
     // hence , unsubscribe
     aboutToBeDeleted(owningView?: IPropertySubscriber): void {
-      AppStorage.UnsubscribeFromChangesOf("arr", this.id__());
+      AppStorage.unsubscribeFromChangesOf("arr", this.id__());
       SubscriberManager.Delete(this.id__());
     }
 
@@ -105,22 +105,22 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
 
   tcase("create and read back", () => {
     let arr: number[] = [1, 2, 3, 4];
-    AppStorage.SetOrCreate<number[]>("arr", arr);
+    AppStorage.setOrCreate<number[]>("arr", arr);
 
-    test("AppStrorage has initial one ObservedProperties", AppStorage.Size() == 1);
-    test("Initial array value readback.", AppStorage.Get<number[]>("arr").toString() == arr.toString());
-    test(`Initial array value readback, check Array.isArray`, Array.isArray(AppStorage.Get<number[]>("arr")));
-    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.Get<number[]>("arr")));
+    test("AppStrorage has initial one ObservedProperties", AppStorage.size() == 1);
+    test("Initial array value readback.", AppStorage.get<number[]>("arr").toString() == arr.toString());
+    test(`Initial array value readback, check Array.isArray`, Array.isArray(AppStorage.get<number[]>("arr")));
+    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.get<number[]>("arr")));
   });
 
   tcase("push to array", () => {
     let arrSub = new ArrayChangeSubscriber();
     let spyArrayChange = spyOn(arrSub, "hasChanged");
-    AppStorage.Get<number[]>("arr").push(5);
-    test("Changed array value readback", AppStorage.Get<number[]>("arr").toString() == [1, 2, 3, 4, 5].toString());
+    AppStorage.get<number[]>("arr").push(5);
+    test("Changed array value readback", AppStorage.get<number[]>("arr").toString() == [1, 2, 3, 4, 5].toString());
     test(`hasChanged was called`, spyArrayChange.called);
     test(`hasChanged param is the correct changed array.`, spyArrayChange.args[0].toString() == [1, 2, 3, 4, 5].toString());
-    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.Get<number[]>("arr")));
+    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.get<number[]>("arr")));
     arrSub.aboutToBeDeleted();
   });
 
@@ -128,12 +128,12 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
     let arrSub = new ArrayChangeSubscriber();
     let spyArrayChange = spyOn(arrSub, "hasChanged");
 
-    AppStorage.Set<number[]>("arr", [2, 3, 4]);
+    AppStorage.set<number[]>("arr", [2, 3, 4]);
 
-    test("Changed array value readback", AppStorage.Get<number[]>("arr").toString() == [2, 3, 4].toString());
+    test("Changed array value readback", AppStorage.get<number[]>("arr").toString() == [2, 3, 4].toString());
     test(`hasChanged was called`, spyArrayChange.called);
     test(`hasChanged param is the correct changed array.`, spyArrayChange.args[0].toString() == [2, 3, 4].toString());
-    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.Get<number[]>("arr")));
+    test(`Initial array value readback, check instance of ObservedObject`, ObservedObject.IsObservedObject(AppStorage.get<number[]>("arr")));
 
     arrSub.aboutToBeDeleted();
   });
@@ -141,19 +141,19 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
 
   tcase("change property value gets observed #2", () => {
     let arrSub = new ArrayChangeSubscriber();
-    AppStorage.Set<number[]>("arr", [2, 3, 4]);
+    AppStorage.set<number[]>("arr", [2, 3, 4]);
     let spyArrayChange = spyOn(arrSub, "hasChanged");
-    AppStorage.Get<number[]>("arr")[1] = 7;
+    AppStorage.get<number[]>("arr")[1] = 7;
 
-    test("Changed array value readback", AppStorage.Get<number[]>("arr").toString() == [2, 7, 4].toString());
+    test("Changed array value readback", AppStorage.get<number[]>("arr").toString() == [2, 7, 4].toString());
     test(`hasChanged was called`, spyArrayChange.called);
     test(`hasChanged param is the correct changed array.`, spyArrayChange.args[0].toString() == [2, 7, 4].toString());
     arrSub.aboutToBeDeleted();
   });
 
   tcase("ObservedObject Array proxying is transparent", () => {
-    AppStorage.Set<number[]>("arr", [2, 3, 4]);
-    let link = AppStorage.Link<number[]>("arr");
+    AppStorage.set<number[]>("arr", [2, 3, 4]);
+    let link = AppStorage.link<number[]>("arr");
     test("link readback value OK", link.get().toString() == [2, 3, 4].toString());
     test("link readback value OK", link.get().length == 3);
     test("Array.isArray(link) OK", Array.isArray(link.get()));
@@ -170,14 +170,14 @@ const testAppStorageArray = tsuite("AppStorage Array", () => {
   tcase("cleanup ok", () => {
 
     // manual cleanup to see everything works as expected
-    const deleteOk = AppStorage.Delete("arr");
+    const deleteOk = AppStorage.delete("arr");
     test(`Deletion of props form AppStrorage without isuses`, deleteOk);
-    test(`AppStrorage has ${AppStorage.Size()} ObservedProperties: >${Array.from(AppStorage.Keys())}<, should be none.`, AppStorage.Size() == 0);
+    test(`AppStrorage has ${AppStorage.size()} ObservedProperties: >${Array.from(AppStorage.keys())}<, should be none.`, AppStorage.size() == 0);
 
     test(`SubscriberManager num of subscribers us ${SubscriberManager.NumberOfSubscribers()} should be 0 .`, 
        SubscriberManager.NumberOfSubscribers() == 0);
 
     // this will do nothing because manual cleanup was done already
-    AppStorage.AboutToBeDeleted();
+    AppStorage.aboutToBeDeleted();
   });
 });
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_test.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_test.ts
index f36bcb51e78d324a5fdc632d92471a72e73d13fe..41301602d7546fce8185e6b903d66c54d7256723 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_test.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/app_storage_test.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -16,56 +16,56 @@
 const testAppStorage = tsuite("AppStorage", () => {
 
   tcase("size", () => {
-    AppStorage.CreateSingleton({say: "Hello", name: "Gudio"});
-    test("AppStrorage has initial two ObservedProperties", AppStorage.Size() == 2);
+    AppStorage.createSingleton({say: "Hello", name: "Gudio"});
+    test("AppStrorage has initial two ObservedProperties", AppStorage.size() == 2);
   });
 
   tcase("AppStorage has self set value", () => {
-    test("added 'say' is in AppStrorage", AppStorage.Has("say"));
+    test("added 'say' is in AppStrorage", AppStorage.has("say"));
   });
 
   tcase("AppStorage remembers self set value", () => {
-    test("added 'say' wrong value", AppStorage.Get<string>("say") == "Hello");
-    test("added 'name' wrong value", AppStorage.Get<string>("name") == "Gudio");
+    test("added 'say' wrong value", AppStorage.get<string>("say") == "Hello");
+    test("added 'name' wrong value", AppStorage.get<string>("name") == "Gudio");
   });
 
   tcase("AppStorage remembers self set boolean value", () => {
-    AppStorage.SetOrCreate<boolean>("true", true);
-    test("added 'true' wrong boolean value", AppStorage.Get<boolean>("true"));
+    AppStorage.setOrCreate<boolean>("true", true);
+    test("added 'true' wrong boolean value", AppStorage.get<boolean>("true"));
   });
 
   tcase("AppStorage remembers self set number value", () => {
-    AppStorage.SetOrCreate<number>("favorite", 47);
+    AppStorage.setOrCreate<number>("favorite", 47);
 
-    test("added 'favorite', has correct number value", AppStorage.Get<number>("favorite") == 47);
-    test("added 'favorite' converted to string is '47'", AppStorage.Get<string>("favorite") == "47");
+    test("added 'favorite', has correct number value", AppStorage.get<number>("favorite") == 47);
+    test("added 'favorite' converted to string is '47'", AppStorage.get<string>("favorite") == "47");
   });
 
 
-  var link1: SubscribedAbstractProperty<string> = AppStorage.Link<string>("say");
-  var link2: SubscribedAbstractProperty<string> = AppStorage.Link<string>("say");
+  var link1: SubscribedAbstractProperty<string> = AppStorage.link<string>("say");
+  var link2: SubscribedAbstractProperty<string> = AppStorage.link<string>("say");
 
   tcase("AppStorage and link1 update from link1.set",
     () => {
       link1.set("Anton");
-      test("AppStorage: 'say' expected updated value is `Anton`.", AppStorage.Get<string>("say") == "Anton");
+      test("AppStorage: 'say' expected updated value is `Anton`.", AppStorage.get<string>("say") == "Anton");
       test("SyncedPropertyTwoWay#1: 'say' expected updated value is `Anton`.", link2.get() == "Anton");
     });
 
   tcase("AppStorage and link2 update from link1.set", () => {
     link1.set("Hanna");
-    test("AppStorage: 'say' expected updated value is `Hanna`.", AppStorage.Get<string>("say") == "Hanna");
+    test("AppStorage: 'say' expected updated value is `Hanna`.", AppStorage.get<string>("say") == "Hanna");
     test("SyncedPropertyTwoWay#2: 'say' expected updated value is `Hanna`.", link2.get() == "Hanna");
   });
 
   tcase("link1 and link2 update from AppStorage.set", () => {
-    AppStorage.Set<string>("say", "Paul");
+    AppStorage.set<string>("say", "Paul");
     test("SyncedPropertyTwoWay#1: 'say' expected updated value is `Paul`.", link1.get() == "Paul");
     test("SyncedPropertyTwoWay#2: 'say' expected updated value is `Paul`.", link2.get() == "Paul");
   });
 
-  AppStorage.Set("say", "Guido");
-  let prop = AppStorage.Prop("say");
+  AppStorage.set("say", "Guido");
+  let prop = AppStorage.prop("say");
 
   tcase("prop.get", () => {
     test("prop value expected `Guido`.", prop.get() == "Guido");
@@ -76,18 +76,18 @@ const testAppStorage = tsuite("AppStorage", () => {
     prop.set("Hanna");
     test("prop changed value expected `Hanna`.", prop.get() == "Hanna");
     test("link1 unchanged value expected `Guido`.", link1.get() == "Guido");
-    test("app unchanged value expected `Guido`.", AppStorage.Get("say") == "Guido");
+    test("app unchanged value expected `Guido`.", AppStorage.get("say") == "Guido");
   })
 
   tcase("appstorage set changes prop values", () => {
-    AppStorage.Set("say", "Anton");
+    AppStorage.set("say", "Anton");
     test("prop changed value expected `Anton`.", prop.get() == "Anton");
   })
 
   tcase("unsubscribe proptoLink1, linkToLink2", () => {
-    const asSubscribers = AppStorage.NumberOfSubscribersTo("say");
+    const asSubscribers = AppStorage.numberOfSubscribersTo("say");
     link2.aboutToBeDeleted();
-    test("link2 subscriber has been unsubscribed from as", AppStorage.NumberOfSubscribersTo("say") == asSubscribers - 1);
+    test("link2 subscriber has been unsubscribed from as", AppStorage.numberOfSubscribersTo("say") == asSubscribers - 1);
   })
 
   class TestAClass {
@@ -99,22 +99,22 @@ const testAppStorage = tsuite("AppStorage", () => {
   let objAClass2: TestAClass = { a: 101, b: 201 };
 
   tcase("ObservedObject create, get, set", () => {
-    AppStorage.SetOrCreate<TestAClass>("objAClass", objAClass1);
-    test("ObservedObject create, value read back prop 'a'", (AppStorage.Get<TestAClass>("objAClass").a == 1 && AppStorage.Get<TestAClass>("objAClass").b == 2));
+    AppStorage.setOrCreate<TestAClass>("objAClass", objAClass1);
+    test("ObservedObject create, value read back prop 'a'", (AppStorage.get<TestAClass>("objAClass").a == 1 && AppStorage.get<TestAClass>("objAClass").b == 2));
 
-    AppStorage.Get<TestAClass>("objAClass").a = 47;
-    test("ObservedObject property value change, value read back", AppStorage.Get<TestAClass>("objAClass").a == 47);
+    AppStorage.get<TestAClass>("objAClass").a = 47;
+    test("ObservedObject property value change, value read back", AppStorage.get<TestAClass>("objAClass").a == 47);
 
-    AppStorage.Set<TestAClass>("objAClass", objAClass2);
+    AppStorage.set<TestAClass>("objAClass", objAClass2);
     test("ObservedProperty of type ObservedObject set new ObservedObject, value read back",
-      AppStorage.Get<TestAClass>("objAClass").a == 101 && AppStorage.Get<TestAClass>("objAClass").b == 201);
+      AppStorage.get<TestAClass>("objAClass").a == 101 && AppStorage.get<TestAClass>("objAClass").b == 201);
 
-    AppStorage.Get<TestAClass>("objAClass").a = 102;
+    AppStorage.get<TestAClass>("objAClass").a = 102;
     test("Followed by prop value change, value read back",
-      AppStorage.Get<TestAClass>("objAClass").a == 102 && AppStorage.Get<TestAClass>("objAClass").b == 201);
+      AppStorage.get<TestAClass>("objAClass").a == 102 && AppStorage.get<TestAClass>("objAClass").b == 201);
   })
 
-  let linktoObsObj = AppStorage.Link<TestAClass>("objAClass");
+  let linktoObsObj = AppStorage.link<TestAClass>("objAClass");
 
   tcase("ObservedObject Link create, get, set", () => {
 
@@ -123,7 +123,7 @@ const testAppStorage = tsuite("AppStorage", () => {
     linktoObsObj.get().b = 203;
     test("link to ObservedObject, set value, read back link value", linktoObsObj.get().b == 203);
     test("link to ObservedObject, set value, read back value from AppStorage",
-      AppStorage.Get<TestAClass>("objAClass").b == 203);
+      AppStorage.get<TestAClass>("objAClass").b == 203);
   })
 
   tcase("ObservedObject Prop to Link create, get, set", () => {
@@ -135,12 +135,11 @@ const testAppStorage = tsuite("AppStorage", () => {
     test("prop to link to ObservedObject, set value locally, read back prop value", propToLinktoObsObj.get().b == 204);
     test("prop to link to ObservedObject, set value locally, read back link value", linktoObsObj.get().b == 203);
     test("prop to link to ObservedObject, set value locally, read back value from AppStorage",
-      AppStorage.Get<TestAClass>("objAClass").b == 203);
+      AppStorage.get<TestAClass>("objAClass").b == 203);
     linktoObsObj.aboutToBeDeleted();
     propToLinktoObsObj.aboutToBeDeleted();
   })
-
-  let proptoObsObj = AppStorage.Prop<TestAClass>("objAClass");
+  let proptoObsObj = AppStorage.prop<TestAClass>("objAClass");
 
   tcase("ObservedObject Prop create, get, set", () => {
 
@@ -149,11 +148,11 @@ const testAppStorage = tsuite("AppStorage", () => {
     proptoObsObj.get().b = 201;
     test("prop to ObservedObject, set value locally, read back prop value", proptoObsObj.get().b == 201);
     test("prop to ObservedObject, set value locally, read back original prop value from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 203);
+        AppStorage.get<TestAClass>("objAClass").b == 203);
 
-    AppStorage.Set<TestAClass>("objAClass", { a: 42, b: 84 });
+    AppStorage.set<TestAClass>("objAClass", { a: 42, b: 84 });
     test("prop to ObservedObject, set value to AppStorage, read back from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 84);
+        AppStorage.get<TestAClass>("objAClass").b == 84);
     test("prop to ObservedObject, set value to AppStorage, read back from prop", proptoObsObj.get().b == 84);
   })
 
@@ -166,11 +165,11 @@ const testAppStorage = tsuite("AppStorage", () => {
     test("prop to prop to ObservedObject, set value locally, read back prop value", propToPropObsObj.get().a == 201);
     test("prop to prop to ObservedObject, set value locally, read back value from parent prop", proptoObsObj.get().a == 42);
     test("prop to prop to ObservedObject, set value locally, read back original prop value from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").a == 42);
+        AppStorage.get<TestAClass>("objAClass").a == 42);
 
-    AppStorage.Set<TestAClass>("objAClass", { a: 421, b: 842 });
+    AppStorage.set<TestAClass>("objAClass", { a: 421, b: 842 });
     test("prop to prop to ObservedObject, set value to AppStorage, read back from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 842);
+        AppStorage.get<TestAClass>("objAClass").b == 842);
     test("prop to prop toObservedObject, set value to AppStorage, read back from prop", propToPropObsObj.get().b == 842);
     test("prop to prop toObservedObject, set value to AppStorage, read back from parent prop", proptoObsObj.get().b == 842);
 
@@ -185,11 +184,11 @@ const testAppStorage = tsuite("AppStorage", () => {
     proptoObsObj.get().b = 201;
     test("prop to ObservedObject, set value locally, read back prop value", proptoObsObj.get().b == 201);
     test("prop to ObservedObject, set value locally, read back original prop value from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 203);
+        AppStorage.get<TestAClass>("objAClass").b == 203);
 
-    AppStorage.Set<TestAClass>("objAClass", { a: 42, b: 84 });
+    AppStorage.set<TestAClass>("objAClass", { a: 42, b: 84 });
     test("prop to ObservedObject, set value to AppStorage, read back from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 84);
+        AppStorage.get<TestAClass>("objAClass").b == 84);
     test("prop to ObservedObject, set value to AppStorage, read back from prop", proptoObsObj.get().b == 84);
   })
 
@@ -202,11 +201,11 @@ const testAppStorage = tsuite("AppStorage", () => {
     test("prop to prop to ObservedObject, set value locally, read back prop value", propToPropObsObj.get().a == 201);
     test("prop to prop to ObservedObject, set value locally, read back value from parent prop", proptoObsObj.get().a == 42);
     test("prop to prop to ObservedObject, set value locally, read back original prop value from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").a == 42);
+        AppStorage.get<TestAClass>("objAClass").a == 42);
 
     AppStorage.Set<TestAClass>("objAClass", { a: 421, b: 842 });
     test("prop to prop to ObservedObject, set value to AppStorage, read back from AppStorage", 
-        AppStorage.Get<TestAClass>("objAClass").b == 842);
+        AppStorage.get<TestAClass>("objAClass").b == 842);
     test("prop to prop toObservedObject, set value to AppStorage, read back from prop", propToPropObsObj.get().b == 842);
     test("prop to prop toObservedObject, set value to AppStorage, read back from parent prop", proptoObsObj.get().b == 842);
 
@@ -219,13 +218,13 @@ const testAppStorage = tsuite("AppStorage", () => {
     prop.aboutToBeDeleted();
     // note link2 and linktoLink2 have been deleted already earlier in this test suite!
 
-    const deleteOk = AppStorage.Delete("name") && AppStorage.Delete("say") && AppStorage.Delete("true") && AppStorage.Delete("favorite") && AppStorage.Delete("objAClass");
+    const deleteOk = AppStorage.delete("name") && AppStorage.delete("say") && AppStorage.delete("true") && AppStorage.delete("favorite") && AppStorage.delete("objAClass");
     test(`Deletion of props form AppStrorage without isuses`, deleteOk)
 
     // test that manual cleanup has been complete, before calling AppStorage.NboutToBeDeleted();
-    test(`AppStrorage has ${AppStorage.Size()} ObservedProperties: >${Array.from(AppStorage.Keys())}<, should be none.`, AppStorage.Size() == 0);
+    test(`AppStrorage has ${AppStorage.size()} ObservedProperties: >${Array.from(AppStorage.keys())}<, should be none.`, AppStorage.size() == 0);
 
-    AppStorage.AboutToBeDeleted();
+    AppStorage.aboutToBeDeleted();
 
     test(`SubscriberManager num of subscribers is ${SubscriberManager.NumberOfSubscribers()} should be 0 .`, 
       SubscriberManager.NumberOfSubscribers() == 0);
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/environment_test.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/environment_test.ts
index 84846502945d28dd69ec07b41e52176ee137f6ea..e528f0d6a444ec89628ce7a704b6765aceea9409 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/environment_test.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/environment_test.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -25,19 +25,19 @@ const testEnvironment = tsuite("Environment", () => {
   ];
 
   tcase("Initialization", () => {
-    Environment.ConfigureBackend(mockEnv);
+    Environment.configureBackend(mockEnv);
     test("Environment initialized", true);
   });
 
   tcase("Injecting values", () => {
-    Environment.EnvProps(envProps);
+    Environment.envProps(envProps);
   });
 
   tcase("Get all value keys", () => {
-    const keys = Environment.Keys();
+    const keys = Environment.keys();
     console.debug("Environment variables:");
     for (let i in keys) {
-      console.debug(`${keys[i]} - strigified value: ${JSON.stringify(AppStorage.Get(keys[i]))}`);
+      console.debug(`${keys[i]} - strigified value: ${JSON.stringify(AppStorage.get(keys[i]))}`);
     }
 
     test("Environment number of keys returned corresponds with number of values registered", keys.length == envProps.length);
@@ -45,21 +45,21 @@ const testEnvironment = tsuite("Environment", () => {
 
   tcase("Value retrieval", () => {
     // the native backend treats bool as string
-    test("Environment value 'accessibilityEnabled' correct", AppStorage.Get<string>("accessibilityEnabled") == "false");
-    test("Environment value 'languageCode' correct", AppStorage.Get<string>("languageCode") == "cn");
+    test("Environment value 'accessibilityEnabled' correct", AppStorage.get<string>("accessibilityEnabled") == "false");
+    test("Environment value 'languageCode' correct", AppStorage.get<string>("languageCode") == "cn");
   });
 
   tcase("Value changes from backend", () => {
     mockEnv.simulateChange("accessibilityEnabled", true);
     mockEnv.simulateChange("languageCode", "en");
-    test("Environment value 'languageCode' after backend change", AppStorage.Get<string>("languageCode") == "en");
-    test("Environment value 'accessibilityEnabled' after backend change", AppStorage.Get<boolean>("accessibilityEnabled") === true);
+    test("Environment value 'languageCode' after backend change", AppStorage.get<string>("languageCode") == "en");
+    test("Environment value 'accessibilityEnabled' after backend change", AppStorage.get<boolean>("accessibilityEnabled") === true);
     test("Environment value change simulation ", true);
   });
 
 
   tcase("Teardown", () => {
-    Environment.AboutToBeDeleted();
+    Environment.aboutToBeDeleted();
     test("Environment instance destroyed", true);
   });
 });
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/persistent_storage_test.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/persistent_storage_test.ts
index e083d26dc448edb2a1573191fc980c207696d818..c85c2627c5f2503a94b3ea0da6be111e82dd9936 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/persistent_storage_test.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/common/persistent_storage_test.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Huawei Device Co., Ltd.
+ * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -15,20 +15,20 @@
 
 const testPersistentStorage = tsuite("PersistentStorage", () => {
   let ms = new MockStorage("./src/utest/resources/test.db");
-  PersistentStorage.ConfigureBackend(ms);
+  PersistentStorage.configureBackend(ms);
 
   tcase("persisting existing values in AppStorage", () => {
-    AppStorage.SetOrCreate<number>("existingPropToPersist", 123);
-    PersistentStorage.PersistProp<number>("existingPropToPersist", 456);
+    AppStorage.setOrCreate<number>("existingPropToPersist", 123);
+    PersistentStorage.persistProp<number>("existingPropToPersist", 456);
 
-    test("PersistentStorage 'existingPropToPersist' value retrieved from AppStorage correct", AppStorage.Get<number>("existingPropToPersist") == 123);
+    test("PersistentStorage 'existingPropToPersist' value retrieved from AppStorage correct", AppStorage.get<number>("existingPropToPersist") == 123);
     test("PersistentStorage 'existingPropToPersist' value retrieved from MockStorage correct", ms.get("existingPropToPersist") == 123);
   });
   tcase("retrieval of values", () => {
-    AppStorage.SetOrCreate<string>("persistentSay", "Terve");
-    AppStorage.SetOrCreate<string>("persistentSubject", "Maailma");
+    AppStorage.setOrCreate<string>("persistentSay", "Terve");
+    AppStorage.setOrCreate<string>("persistentSubject", "Maailma");
 
-    PersistentStorage.PersistProps([{
+    PersistentStorage.persistProps([{
       key: "persistentSay",
       defaultValue: "Terve"
     }, {
@@ -36,55 +36,55 @@ const testPersistentStorage = tsuite("PersistentStorage", () => {
       defaultValue: "Maailma"
     }]);
 
-    test(`PersistentStorage 'persistentSay' value retrieved from AppStorage correct`, AppStorage.Get<string>("persistentSay") === "Terve");
-    test("PersistentStorage 'persistentSubject' value retrieved from AppStorage correct", AppStorage.Get<string>("persistentSubject") == "Maailma");
+    test(`PersistentStorage 'persistentSay' value retrieved from AppStorage correct`, AppStorage.get<string>("persistentSay") === "Terve");
+    test("PersistentStorage 'persistentSubject' value retrieved from AppStorage correct", AppStorage.get<string>("persistentSubject") == "Maailma");
   });
 
   tcase("writing values to IStorage via PersistentStorage", () => {
-    PersistentStorage.PersistProps([{
+    PersistentStorage.persistProps([{
       key: "writeToDb",
       defaultValue: ""
     }, {
       key: "numberToDb",
       defaultValue: 10
     }]);
-    AppStorage.Set("writeToDb", "test");
-    AppStorage.Set("numberToDb", 42);
-    test("PersistentStorage 'persistentSay' value retrieved from AppStorage correct", AppStorage.Get<string>("persistentSay") == "Terve");
-    test("PersistentStorage 'persistentSubject' value retrieved from AppStorage correct", AppStorage.Get<string>("persistentSubject") == "Maailma");
-    test("PersistentStorage 'writeToDb' value retrieved from AppStorage correct", AppStorage.Get<string>("writeToDb") == "test");
-    test("PersistentStorage 'numberToDb' value retrieved from AppStorage correct", AppStorage.Get<number>("numberToDb") == 42);
+    AppStorage.set("writeToDb", "test");
+    AppStorage.set("numberToDb", 42);
+    test("PersistentStorage 'persistentSay' value retrieved from AppStorage correct", AppStorage.get<string>("persistentSay") == "Terve");
+    test("PersistentStorage 'persistentSubject' value retrieved from AppStorage correct", AppStorage.get<string>("persistentSubject") == "Maailma");
+    test("PersistentStorage 'writeToDb' value retrieved from AppStorage correct", AppStorage.get<string>("writeToDb") == "test");
+    test("PersistentStorage 'numberToDb' value retrieved from AppStorage correct", AppStorage.get<number>("numberToDb") == 42);
 
     test("PersistentStorage 'writeToDb' value retrieved from MockStorage correct", ms.get<string>("writeToDb") == "test");
     test("PersistentStorage 'numberToDb' value retrieved from MockStorage correct", ms.get("numberToDb") == 42);
   });
 
   tcase("deleting values from IStorage via PersistentStorage", () => {
-    PersistentStorage.DeleteProp("writeToDb");
-    PersistentStorage.DeleteProp("numberToDb");
-    AppStorage.Delete("writeToDb");
-    AppStorage.Delete("numberToDb");
+    PersistentStorage.deleteProp("writeToDb");
+    PersistentStorage.deleteProp("numberToDb");
+    AppStorage.delete("writeToDb");
+    AppStorage.delete("numberToDb");
     test("MockStorage 'writeToDb' value deleted", ms.get("writeToDb") == undefined);
     test("MockStorage 'numberToDb' value deleted", ms.get("numberToDb") == undefined);
   });
 
   tcase("Persisting new property that does not exist in db", () => {
-    PersistentStorage.PersistProp("newProp", "new property value");
+    PersistentStorage.persistProp("newProp", "new property value");
 
-   test("PersistentStorage 'newProp' value retrieved from AppStorage correct", AppStorage.Get<string>("newProp") == "new property value");
+   test("PersistentStorage 'newProp' value retrieved from AppStorage correct", AppStorage.get<string>("newProp") == "new property value");
    test("MockStorage 'newProp' value retrieved from MockStorage correct", ms.get("newProp") == "new property value");
   });
 
   tcase("keys retrieval", () => {
-    const keys = PersistentStorage.Keys();
+    const keys = PersistentStorage.keys();
     for (var i in keys) {
       console.debug(`${keys[i]}`);
     }
   });
 
   tcase("teardown", () => {
-    PersistentStorage.AboutToBeDeleted();
-    const deleteOk = AppStorage.Delete("persistentSay") && AppStorage.Delete("persistentSubject") && AppStorage.Delete("newProp") && AppStorage.Delete("existingPropToPersist");
+    PersistentStorage.aboutToBeDeleted();
+    const deleteOk = AppStorage.delete("persistentSay") && AppStorage.delete("persistentSubject") && AppStorage.delete("newProp") && AppStorage.delete("existingPropToPersist");
 
     SubscriberManager.DumpSubscriberInfo();
 
diff --git a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/partial_update/viewpu_appstorage_test.ts b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/partial_update/viewpu_appstorage_test.ts
index 99847a9e999960f2925880cd54a78d030f31350e..b841ee42a49e43562720487bd516b648bdf4d7e4 100644
--- a/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/partial_update/viewpu_appstorage_test.ts
+++ b/frameworks/bridge/declarative_frontend/state_mgmt/src/utest/partial_update/viewpu_appstorage_test.ts
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Copyright (c) 2022-2023 Huawei Device Co., Ltd.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -48,19 +48,19 @@ const testViewAppStorage = tsuite("@StorageLink - AppStorge", () => {
 
   /* @StorageLink(moveDistance) storeProp:number=  0;  */
   let __storeProp: SubscribedAbstractProperty<number> =
-    AppStorage.SetAndLink<number>('storeProp', /* default value */  7,  /* subscriber */ storeView, /* var name in View */ "viewVar");
+    AppStorage.setAndLink<number>('storeProp', /* default value */  7,  /* subscriber */ storeView, /* var name in View */ "viewVar");
 
 
   tcase("read back", () => {
-    test("readback from AppStorage", AppStorage.Get("storeProp") == 7);
+    test("readback from AppStorage", AppStorage.get("storeProp") == 7);
     test("readback from view variable", __storeProp.get() == 7);
   });
 
   tcase("modify via AppStore", () => {
     let spy = spyOn(storeView, "propertyHasChanged");
-    AppStorage.Set("storeProp", 47);
+    AppStorage.set("storeProp", 47);
 
-    test("readback from AppStorage", AppStorage.Get("storeProp") == 47);
+    test("readback from AppStorage", AppStorage.get("storeProp") == 47);
     test("readback from view variable", __storeProp.get() == 47);
     test("View.propertyHasChanged has been called", spy.called && spy.args[0] == "viewVar");
   });
@@ -68,7 +68,7 @@ const testViewAppStorage = tsuite("@StorageLink - AppStorge", () => {
   tcase("modify via @StorageLink", () => {
     let spy2 = spyOn(storeView, "propertyHasChanged");
     __storeProp.set(101);
-    test("readback from AppStorage", AppStorage.Get("storeProp") == 101);
+    test("readback from AppStorage", AppStorage.get("storeProp") == 101);
     test("readback from view variable", __storeProp.get() == 101);
     test("View.propertyHasChanged has been called", spy2.called && spy2.args[0] == "viewVar");
   });