From 6658f8baac9a46e49d86a96b85af09d7871bd58e Mon Sep 17 00:00:00 2001
From: wusongqing <wusongqing@huawei.com>
Date: Thu, 3 Mar 2022 16:35:10 +0800
Subject: [PATCH] updated docs

Signed-off-by: wusongqing <wusongqing@huawei.com>
---
 .../reference/apis/js-apis-Context.md         |  52 +-
 .../reference/apis/js-apis-DataUriUtils.md    |  10 +-
 .../apis/js-apis-dataAbilityHelper.md         | 594 ++++++++----------
 .../apis/js-apis-service-extension-context.md |  24 +-
 .../apis/js-apis-service-extension.md         |  24 +-
 .../apis/js-apis-dataAbilityHelper.md         |   8 +-
 6 files changed, 346 insertions(+), 366 deletions(-)

diff --git a/en/application-dev/reference/apis/js-apis-Context.md b/en/application-dev/reference/apis/js-apis-Context.md
index 3687d1cea2..57a9f803f3 100644
--- a/en/application-dev/reference/apis/js-apis-Context.md
+++ b/en/application-dev/reference/apis/js-apis-Context.md
@@ -63,8 +63,8 @@ If this method is called for the first time, a root directory is created.
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getOrCreateLocalDir().then((void) => {
-	console.info("==========================>getOrCreateLocalDirCallback=======================>");
+context.getOrCreateLocalDir().then((data) => {
+    console.info("data=" + data);
 });
 ```
 
@@ -91,9 +91,9 @@ Verifies whether a specific PID and UID have the given permission. This method u
 import featureAbility from '@ohos.ability.featureAbility'
 import bundle from '@ohos.bundle'
 var context = featureAbility.getContext();
-var datainfo = await bundle.getBundleInfo('com.context.test',1);
-context.verifyPermission("com.example.permission",datainfo.uid)
-
+bundle.getBundleInfo('com.context.test', 1, (datainfo) =>{
+	context.verifyPermission("com.example.permission", datainfo.uid);
+});
 ```
 
 
@@ -146,8 +146,9 @@ Verifies whether a specific PID and UID have the given permission. This method u
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
 var Permission = context.PermissionOptions(1,1);
-context.getOrCreateLocalDir('com.context.permission',Permission).then((void) => {
-	console.info("==========================>verifyPermissionCallback=======================>");
+context.verifyPermission('com.context.permission',Permission).then((data) => {
+    console.info("======================>verifyPermissionCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -172,13 +173,16 @@ Requests certain permissions from the system. This method uses a callback to ret
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getOrCreateLocalDir(    
+context.requestPermissionsFromUser(
     ["com.example.permission1",
      "com.example.permission2",
      "com.example.permission3",
      "com.example.permission4",
      "com.example.permission5"],
-    1,
+    1,(err, data)=>{
+        console.info("====>requestdata====>" + JSON.stringify(data));
+        console.info("====>requesterrcode====>" + JSON.stringify(err.code));
+    }
 )
 ```
 
@@ -223,8 +227,9 @@ Obtains information about the current application. This method uses a promise to
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getApplicationInfo().then((void) => {
-	console.info("==========================>getApplicationInfoCallback=======================>");
+context.getApplicationInfo().then((data) => {
+    console.info("=====================>getApplicationInfoCallback===================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -269,8 +274,9 @@ Obtains the bundle name of the current ability. This method uses a promise to re
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getBundleName().then((void) => {
-	console.info("==========================>getBundleNameCallback=======================>");
+context.getBundleName().then((data) => {
+    console.info("=======================>getBundleNameCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -315,8 +321,9 @@ Obtains information about the current process, including the PID and process nam
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getProcessInfo().then((void) => {
-	console.info("==========================>getProcessInfoCallback=======================>");
+context.getProcessInfo().then((data) => {
+    console.info("=======================>getProcessInfoCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -365,8 +372,9 @@ This method is available only to Page abilities.
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getElementName().then((void) => {
-	console.info("==========================>getElementNameCallback=======================>");
+context.getElementName().then((data) => {
+    console.info("=======================>getElementNameCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -407,8 +415,9 @@ Obtains the name of the current process. This method uses a promise to return th
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getProcessName().then((void) => {
-	console.info("==========================>getProcessNameCallback=======================>");
+context.getProcessName().then((data) => {
+    console.info("=======================>getProcessNameCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
@@ -453,8 +462,9 @@ Obtains the bundle name of the calling ability. This method uses a promise to re
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
 var context = featureAbility.getContext();
-context.getCallingBundle().then((void) => {
-	console.info("==========================>getCallingBundleCallback=======================>");
+context.getCallingBundle().then((data) => {
+    console.info("======================>getCallingBundleCallback====================>");
+    console.info("====>data====>" + JSON.stringify(data));
 });
 ```
 
diff --git a/en/application-dev/reference/apis/js-apis-DataUriUtils.md b/en/application-dev/reference/apis/js-apis-DataUriUtils.md
index 4aa00cd0b3..b45c839bc4 100644
--- a/en/application-dev/reference/apis/js-apis-DataUriUtils.md
+++ b/en/application-dev/reference/apis/js-apis-DataUriUtils.md
@@ -27,7 +27,6 @@ Obtains the ID attached to the end of a given URI.
 **Example**
 
 ```js
-import dataUriUtils from '@ohos.ability.datauriutils'
 dataUriUtils.getIdSync("com.example.dataUriUtils/1221")
 ```
 
@@ -55,10 +54,9 @@ Attaches an ID to the end of a given URI.
 **Example**
 
 ```js
-import dataUriUtils from '@ohos.ability.datauriutils'
 var idint = 1122;
 dataUriUtils.attachId(
-    "com.example.dataUriUtils"
+    "com.example.dataUriUtils",
 	idint,
 )
 ```
@@ -85,7 +83,6 @@ Deletes the ID from the end of a given URI.
 **Example**
 
 ```js
-import dataUriUtils from '@ohos.ability.datauriutils'
 dataUriUtils.deleteId("com.example.dataUriUtils/1221")
 ```
 
@@ -112,10 +109,9 @@ Updates the ID in a given URI.
 **Example**
 
 ```js
-import dataUriUtils from '@ohos.ability.datauriutils'
 var idint = 1122;
 dataUriUtils.updateId(
-    "com.example.dataUriUtils"
-	idint,
+    "com.example.dataUriUtils",
+	idint
 )
 ```
diff --git a/en/application-dev/reference/apis/js-apis-dataAbilityHelper.md b/en/application-dev/reference/apis/js-apis-dataAbilityHelper.md
index dc09e18685..75adfb3f60 100644
--- a/en/application-dev/reference/apis/js-apis-dataAbilityHelper.md
+++ b/en/application-dev/reference/apis/js-apis-dataAbilityHelper.md
@@ -1,6 +1,6 @@
 # DataAbilityHelper Module (JavaScript SDK APIs)
 
-#### Modules to Import
+## Modules to Import
 
 ```
 import featureAbility from '@ohos.ability.featureAbility'
@@ -8,26 +8,23 @@ import ohos_data_ability from '@ohos.data.dataability'
 import ohos_data_rdb from '@ohos.data.rdb'
 ```
 
-#### DataAbilityHelper.openFile(uri: string, mode: string, callback: AsyncCallback\<number>)
+## DataAbilityHelper
 
-- Functionality
+### openFile
 
-  Opens a file with a specified URI. This method uses a callback to return the result.
+openFile(uri: string, mode: string, callback: AsyncCallback\<number>): void
 
+Opens a file with a specified URI. This method uses a callback to return the result.
 
-* Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | -------------------- | ---- | ------------------------ |
-  | uri      | Read-only| string               | Yes| URI of the file to open.|
-  | mode     | Read-only| string               | Yes| Mode for opening the file. The value can be **rwt**.|
-  | callback | Read-only| AsyncCallback\<void> | Yes| Callback used to return the result.|
+| Name| Type| Mandatory| Description|
+| -------- | ---------------------- | ---- | ---------------------------------- |
+| uri      | string                 | Yes| URI of the file to open.|
+| mode     | string                 | Yes| Mode for opening the file. The value can be **rwt**.|
+| callback | AsyncCallback\<number> | Yes| Callback used to return the file descriptor.|
 
-* Return values
-
-  Returns a file descriptor.
-
-* Example
+**Example**
 
 ```javascript
 import featureAbility from '@ohos.ability.featureAbility'
@@ -43,24 +40,25 @@ DAHelper.openFile(
 });
 ```
 
-#### DataAbilityHelper.openFile(uri: string, mode: string)
-
-- Functionality
+### openFile
 
-  Opens a file with a specified URI. This method uses a promise to return the result.
+openFile(uri: string, mode: string): Promise\<number>
 
-* Parameters
+Opens a file with a specified URI. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---- | -------- | ------ | ---- | ------------------------ |
-  | uri  | Read-only| string | Yes| URI of the file to open.|
-  | mode | Read-only| string | Yes| Mode for opening the file. The value can be **rwt**.|
+**Parameters**
 
-* Return values
+| Name| Type| Mandatory| Description|
+| ---- | ------ | ---- | ------------------------ |
+| uri  | string | Yes| URI of the file to open.|
+| mode | string | Yes| Mode for opening the file. The value can be **rwt**.|
 
-  Returns a file descriptor.
+**Return value**
+| Type| Description|
+| ---------------- | ---------------- |
+| Promise\<number> | Promise used to return the file descriptor.|
 
-* Example
+**Example**
 
 ```javascript
 import featureAbility from '@ohos.ability.featureAbility'
@@ -70,30 +68,26 @@ var DAHelper = featureAbility.acquireDataAbilityHelper(
 var mode = "rwt";
 DAHelper.openFile(
     "dataability:///com.example.DataAbility",
-    mode).then((void) => {
+    mode).then((data) => {
 		console.info("==========================>openFileCallback=======================>");
 });
 ```
 
-#### DataAbilityHelper.on(type: 'dataChange', uri: string, callback: AsyncCallback\<void>)
-
-- Functionality
-
-  Registers an observer to observe data specified by a given URI. This method uses a callback to return the result.
+### on('dataChange')
 
-- Parameters
+on(type: 'dataChange', uri: string, callback: AsyncCallback\<void>): void
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | -------------------- | ---- | ------------------------ |
-  | type     | Read-only| string               | Yes| Type of the event to observe. The value is **dataChange**.|
-  | uri      | Read-only| string               | Yes| URI of the data.|
-  | callback | Read-only| AsyncCallback\<void> | Yes| Callback invoked when the data is changed.|
+Registers an observer to observe data specified by a given URI. This method uses a callback to return the result.
 
-- Return value
+**Parameters**
 
-  void
+| Name| Type| Mandatory| Description|
+| -------- | -------------------- | ---- | ------------------------ |
+| type     | string               | Yes| Type of the event to observe. The value is **dataChange**.|
+| uri      | string               | Yes| URI of the data.|
+| callback | AsyncCallback\<void> | Yes| Callback invoked when the data is changed.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -110,25 +104,21 @@ helper.on(
 )
 ```
 
-#### DataAbilityHelper.off(type: 'dataChange', uri: string, callback?: AsyncCallback\<void>)
+### off('dataChange')
 
-- Functionality
+off(type: 'dataChange', uri: string, callback?: AsyncCallback\<void>): void
 
-  Unregisters the observer used to observe data specified by a given URI. This method uses a callback to return the result.
+Unregisters the observer used to observe data specified by a given URI. This method uses a callback to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | -------------------- | ---- | ------------------------ |
-  | type     | Read-only| string               | Yes| Type of the event to observe. The value is **dataChange**.|
-  | uri      | Read-only| string               | Yes| URI of the data.|
-  | callback | Read-only| AsyncCallback\<void> | No| Callback used to return the result.|
+| Name| Type| Mandatory| Description|
+| -------- | -------------------- | ---- | ------------------------ |
+| type     | string               | Yes| Type of the event to observe. The value is **dataChange**.|
+| uri      | string               | Yes| URI of the data.|
+| callback | AsyncCallback\<void> | No| Callback used to return the result.|
 
-- Return value
-
-  void
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -149,24 +139,20 @@ helper.off(
 )
 ```
 
-#### DataAbilityHelper.getType(uri: string, callback: AsyncCallback\<string>)
-
-- Functionality
+### getType
 
-  Obtains the MIME type of the data specified by a given URI. This method uses a callback to return the result.
+getType(uri: string, callback: AsyncCallback\<string>): void
 
-- Parameters
+Obtains the MIME type of the data specified by a given URI. This method uses a callback to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | ---------------------- | ---- | ------------------------ |
-  | uri      | Read-only| string                 | Yes| URI of the data.|
-  | callback | Read-only| AsyncCallback\<string> | Yes| Callback used to return the result.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| -------- | ---------------------- | ---- | --------------------------------------------- |
+| uri      | string                 | Yes| URI of the data.|
+| callback | AsyncCallback\<string> | Yes| Callback used to return the MIME type.|
 
-  Returns the MIME type that matches the data specified by the URI.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -180,23 +166,24 @@ DAHelper.getType(
 });
 ```
 
-#### DataAbilityHelper.getType(uri: string)
-
-- Functionality
+### getType
 
-  Obtains the MIME type of the data specified by a given URI. This method uses a promise to return the result.
+getType(uri: string): Promise\<string>
 
-- Parameters
+Obtains the MIME type of the data specified by a given URI. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---- | -------- | ------ | ---- | ------------------------ |
-  | uri  | Read-only| string | Yes| URI of the data.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ---- | ------ | ---- | ------------------------ |
+| uri  | string | Yes| URI of the data.|
 
-  Returns the MIME type that matches the data specified by the URI.
+**Return value**
+| Type| Description|
+| ---------------- | ----------------------------------- |
+| Promise\<string> | Promise used to return the MIME type.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -210,25 +197,21 @@ DAHelper.getType(
 });
 ```
 
-#### DataAbilityHelper.getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array\<string>>)
+### getFileTypes
 
-- Functionality
+getFileTypes(uri: string, mimeTypeFilter: string, callback: AsyncCallback<Array\<string>>): void
 
-  Obtains the supported MIME types of a specified file. This method uses a callback to return the result.
+Obtains the supported MIME types of a specified file. This method uses a callback to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------------- | -------- | ------------------------------ | ---- | ---------------------------- |
-  | uri            | Read-only| string                         | Yes| URI of the file.|
-  | mimeTypeFilter | Read-only| string                         | Yes| MIME type of the file.|
-  | callback       | Read-only| AsyncCallback\<Array\<string>> | Yes| Callback used to return the result.|
+| Name| Type| Mandatory| Description|
+| -------------- | ------------------------------ | ---- | ---------------------------------- |
+| uri            | string                         | Yes| URI of the file.|
+| mimeTypeFilter | string                         | Yes| MIME type of the file.|
+| callback       | AsyncCallback\<Array\<string>> | Yes| Callback used to return the supported MIME types.|
 
-- Return value
-
-  Returns a MIME type array.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -243,24 +226,27 @@ DAHelper.getFileTypes(
 });
 ```
 
-#### DataAbilityHelper.getFileTypes(uri: string, mimeTypeFilter: string)
 
-- Functionality
 
-  Obtains the supported MIME types of a specified file. This method uses a promise to return the result.
+### getFileTypes
+
+getFileTypes(uri: string, mimeTypeFilter: string): Promise\<Array\<string>>
 
-- Parameters
+Obtains the supported MIME types of a specified file. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------------- | -------- | ------ | ---- | ---------------------------- |
-  | uri            | Read-only| string | Yes| URI of the file.|
-  | mimeTypeFilter | Read-only| string | Yes| MIME type of the file.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| -------------- | ------ | ---- | ---------------------------- |
+| uri            | string | Yes| URI of the file.|
+| mimeTypeFilter | string | Yes| MIME type of the file.|
 
-  Returns a MIME type array.
+**Return value**
+| Type| Description|
+| ------------------------ | ------------------------ |
+| Promise\<Array\<string>> | Promise used to return the supported MIME types.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -275,24 +261,20 @@ DAHelper.getFileTypes(
 });
 ```
 
-#### DataAbilityHelper.normalizeUri(uri: string, callback: AsyncCallback\<string>)
-
-- Functionality
-
-  Converts the URI that refers to a Data ability into a normalized URI. This method uses a callback to return the result.
+### normalizeUri
 
-- Parameters
+normalizeUri(uri: string, callback: AsyncCallback\<string>): void
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | ---------------------- | ---- | ----------------------- |
-  | uri      | Read-only| string                 | Yes| URI object to normalize.|
-  | callback | Read-only| AsyncCallback\<string> | Yes| Callback used to return the result.|
+Converts the URI that refers to a Data ability into a normalized URI. This method uses a callback to return the result.
 
-- Return value
+**Parameters**
 
-  Returns the normalized URI object if the Data ability supports URI normalization; returns **null** otherwise.
+| Name| Type| Mandatory| Description|
+| -------- | ---------------------- | ---- | ------------------------------------------------------------ |
+| uri      | string                 | Yes| URI object to normalize.|
+| callback | AsyncCallback\<string> | Yes| Callback used to return the normalized URI object if the Data ability supports URI normalization. If the Data ability does not support URI normalization, **null** is returned.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -306,23 +288,24 @@ DAHelper.normalizeUri(
 });
 ```
 
-#### DataAbilityHelper.normalizeUri(uri: string)
+### normalizeUri
 
-- Functionality
+normalizeUri(uri: string): Promise\<string>
 
-  Converts the URI that refers to a Data ability into a normalized URI. This method uses a promise to return the result.
+Converts the URI that refers to a Data ability into a normalized URI. This method uses a promise to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---- | -------- | ------ | ---- | ----------------------- |
-  | uri  | Read-only| string | Yes| URI object to normalize.|
+| Name| Type| Mandatory| Description|
+| ---- | ------ | ---- | ----------------------- |
+| uri  | string | Yes| URI object to normalize.|
 
-- Return value
+**Return value**
+| Type| Description|
+| ---------------- | ------------------------------------------------------ |
+| Promise\<string> | Promise used to return the normalized URI object if the Data ability supports URI normalization. If the Data ability does not support URI normalization, **null** is returned.|
 
-  Returns the normalized URI object if the Data ability supports URI normalization; returns **null** otherwise.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -336,24 +319,20 @@ DAHelper.normalizeUri(
 });
 ```
 
-#### DataAbilityHelper.denormalizeUri(uri: string, callback: AsyncCallback\<string>)
-
-- Functionality
-
-  Converts a normalized URI generated by **DataAbilityHelper.normalizeUri(uri: string, callback: AsyncCallback\<string>)** to a denormalized one. This method uses a callback to return the result.
+### denormalizeUri
 
-- Parameters
+denormalizeUri(uri: string, callback: AsyncCallback\<string>): void
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | ---------------------- | ---- | ----------------------- |
-  | uri      | Read-only| string                 | Yes| URI object to denormalize.|
-  | callback | Read-only| AsyncCallback\<string> | Yes| Callback used to return the result.|
+Converts a normalized URI generated by **DataAbilityHelper.normalizeUri(uri: string, callback: AsyncCallback\<string>)** to a denormalized one. This method uses a callback to return the result.
 
-- Return value
+**Parameters**
 
-  Returns the denormalized URI object.
+| Name| Type| Mandatory| Description|
+| -------- | ---------------------- | ---- | --------------------------------------------------- |
+| uri      | string                 | Yes| URI object to normalize.|
+| callback | AsyncCallback\<string> | Yes| Callback used to return the denormalized URI object.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -361,29 +340,32 @@ var DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 DAHelper.denormalizeUri(
-    "dataability:///com.example.DataAbility",,
+    "dataability:///com.example.DataAbility",
     (err, data) => {
 		console.info("==========================>Called=======================>");
 });
 ```
 
-#### DataAbilityHelper.denormalizeUri(uri: string)
 
-- Functionality
 
-  Converts a normalized URI generated by **DataAbilityHelper.normalizeUri(uri: string)** to a denormalized one. This method uses a promise to return the result.
+### denormalizeUri
+
+denormalizeUri(uri: string): Promise\<string>
 
-- Parameters
+Converts a normalized URI generated by **DataAbilityHelper.normalizeUri(uri: string)** to a denormalized one. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---- | -------- | ------ | ---- | ----------------------- |
-  | uri  | Read-only| string | Yes| URI object to denormalize.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ---- | ------ | ---- | ----------------------- |
+| uri  | string | Yes| URI object to normalize.|
 
-  Returns the denormalized URI object.
+**Return value**
+| Type| Description|
+| ---------------- | ----------------------------------------- |
+| Promise\<string> | Promise used to return the denormalized URI object.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -397,24 +379,20 @@ DAHelper.denormalizeUri(
 });
 ```
 
-#### DataAbilityHelper.notifyChange(uri: string, callback: AsyncCallback\<void>)
+### notifyChange
 
-- Functionality
+notifyChange(uri: string, callback: AsyncCallback\<void>): void
 
-  Notifies the registered observer of a change to the data specified by the URI. This method uses a callback to return the result.
+Notifies the registered observer of a change to the data specified by the URI. This method uses a callback to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | -------- | -------- | -------------------- | ---- | ------------------------ |
-  | uri      | Read-only| string               | Yes| URI of the data.|
-  | callback | Read-only| AsyncCallback\<void> | Yes| Callback used to return the result.|
+| Name| Type| Mandatory| Description|
+| -------- | -------------------- | ---- | ------------------------ |
+| uri      | string               | Yes| URI of the data.|
+| callback | AsyncCallback\<void> | Yes| Callback used to return the result.|
 
-- Return value
-
-  void
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -422,29 +400,30 @@ var helper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
 helper.notifyChange(
-    "dataability:///com.example.DataAbility",,
+    "dataability:///com.example.DataAbility",
     (err) => {
 		console.info("==========================>Called=======================>");
 });
 ```
 
-#### DataAbilityHelper.notifyChange(uri: string)
+### notifyChange
 
-- Functionality
+notifyChange(uri: string): Promise\<void>
 
-  Notifies the registered observer of a change to the data specified by the URI. This method uses a promise to return the result.
+Notifies the registered observer of a change to the data specified by the URI. This method uses a promise to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---- | -------- | ------ | ---- | ------------------------ |
-  | uri  | Read-only| string | Yes| URI of the data.|
+| Name| Type| Mandatory| Description|
+| ---- | ------ | ---- | ------------------------ |
+| uri  | string | Yes| URI of the data.|
 
-- Return value
+**Return value**
+| Type| Description|
+| -------------- | --------------------- |
+| Promise\<void> | Promise used to return the result.|
 
-  void
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -453,30 +432,26 @@ var DAHelper = featureAbility.acquireDataAbilityHelper(
 );
 DAHelper.notifyChange(
     "dataability:///com.example.DataAbility",
-	).then((void) => {
+	).then(() => {
 		console.info("==========================>notifyChangeCallback=======================>");
 });
 ```
 
-#### DataAbilityHelper.insert(uri: string, valuesBucket: rdb.ValuesBucket, callback: AsyncCallback\<number>)
-
-- Functionality
+### insert
 
-  Inserts a single data record into the database. This method uses a callback to return the result.
+insert(uri: string, valuesBucket: rdb.ValuesBucket, callback: AsyncCallback\<number>): void
 
-- Parameters
+Inserts a single data record into the database. This method uses a callback to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | ---------------------- | ---- | ------------------------------------------------------ |
-  | uri          | Read-only| string                 | Yes| URI of the data to insert.|
-  | valuesBucket | Read-only| rdb.ValuesBucket       | Yes| Data record to insert. If this parameter is **null**, a blank row will be inserted.|
-  | callback     | Read-only| AsyncCallback\<number> | Yes| Callback used to return the result.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ------------ | ---------------------- | ---- | ------------------------------------------------------ |
+| uri          | string                 | Yes| URI of the data to insert.|
+| valuesBucket | rdb.ValuesBucket       | Yes| Data record to insert. If this parameter is **null**, a blank row will be inserted.|
+| callback     | AsyncCallback\<number> | Yes| Callback used to return the index of the inserted data record.|
 
-  Returns the index of the inserted data record.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -497,24 +472,25 @@ DAHelper.insert(
 });
 ```
 
-#### DataAbilityHelper.insert(uri: string, valuesBucket: rdb.ValuesBucket)
-
-- Functionality
+### insert
 
-  Inserts a single data record into the database. This method uses a promise to return the result.
+insert(uri: string, valuesBucket: rdb.ValuesBucket): Promise\<number>
 
-- Parameters
+Inserts a single data record into the database. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | ---------------- | ---- | ------------------------------------------------------ |
-  | uri          | Read-only| string           | Yes| URI of the data to insert.|
-  | valuesBucket | Read-only| rdb.ValuesBucket | Yes| Data record to insert. If this parameter is **null**, a blank row will be inserted.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ------------ | ---------------- | ---- | ------------------------------------------------------ |
+| uri          | string           | Yes| URI of the data to insert.|
+| valuesBucket | rdb.ValuesBucket | Yes| Data record to insert. If this parameter is **null**, a blank row will be inserted.|
 
-  Returns the index of the inserted data record.
+**Return value**
+| Type| Description|
+| ---------------- | ------------------------ |
+| Promise\<number> | Promise used to return the index of the inserted data record.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -535,25 +511,21 @@ DAHelper.insert(
 });
 ```
 
-#### DataAbilityHelper.batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>, callback: AsyncCallback\<number>)
-
-- Functionality
+### batchInsert
 
-  Inserts multiple data records into the database. This method uses a callback to return the result.
+batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>, callback: AsyncCallback\<number>): void
 
-- Parameters
+Inserts multiple data records into the database. This method uses a callback to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | ----------------------- | ---- | ------------------------ |
-  | uri          | Read-only| string                  | Yes| URI of the data to insert.|
-  | valuesBucket | Read-only| Array<rdb.ValuesBucket> | Yes| Data records to insert.|
-  | callback     | Read-only| AsyncCallback\<number>  | Yes| Callback used to return the result.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ------------ | ----------------------- | ---- | -------------------------------- |
+| uri          | string                  | Yes| URI of the data to insert.|
+| valuesBucket | Array<rdb.ValuesBucket> | Yes| Data records to insert.|
+| callback     | AsyncCallback\<number>  | Yes| Callback used to return the number of inserted data records.|
 
-  Returns the number of inserted data records.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -571,24 +543,25 @@ DAHelper.batchInsert(
 });
 ```
 
-#### DataAbilityHelper.batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>)
-
-- Functionality
+### batchInsert
 
-  Inserts multiple data records into the database. This method uses a promise to return the result.
+batchInsert(uri: string, valuesBuckets: Array<rdb.ValuesBucket>): Promise\<number>
 
-- Parameters
+Inserts multiple data records into the database. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | ----------------------- | ---- | ------------------------ |
-  | uri          | Read-only| string                  | Yes| URI of the data to insert.|
-  | valuesBucket | Read-only| Array<rdb.ValuesBucket> | Yes| Data records to insert.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ------------ | ----------------------- | ---- | ------------------------ |
+| uri          | string                  | Yes| URI of the data to insert.|
+| valuesBucket | Array<rdb.ValuesBucket> | Yes| Data record to insert.|
 
-  Returns the number of inserted data records.
+**Return value**
+| Type| Description|
+| ---------------- | ---------------------- |
+| Promise\<number> | Promise used to return the number of inserted data records.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -606,25 +579,21 @@ DAHelper.batchInsert(
 });
 ```
 
-#### DataAbilityHelper.delete(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>)
+### delete
 
-- Functionality
+delete(uri: string, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void
 
-  Deletes one or more data records from the database. This method uses a callback to return the result.
+Deletes one or more data records from the database. This method uses a callback to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri          | Read-only| string                            | Yes| URI of the data to delete.|
-  | valuesBucket | Read-only| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
-  | callback     | Read-only| AsyncCallback\<number>            | Yes| Callback used to return the result.|
+| Name| Type| Mandatory| Description|
+| ------------ | --------------------------------- | ---- | ------------------------------------------------ |
+| uri          | string                            | Yes| URI of the data to delete.|
+| valuesBucket | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+| callback     | AsyncCallback\<number>            | Yes| Callback used to return the number of deleted data records.|
 
-- Return value
-
-  Returns the number of deleted data records.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -641,24 +610,25 @@ DAHelper.delete(
 });
 ```
 
-#### DataAbilityHelper.delete(uri: string, predicates: dataAbility.DataAbilityPredicates)
-
-- Functionality
+### delete
 
-  Deletes one or more data records from the database. This method uses a promise to return the result.
+delete(uri: string, predicates: dataAbility.DataAbilityPredicates): Promise\<number>
 
-- Parameters
+Deletes one or more data records from the database. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri          | Read-only| string                            | Yes| URI of the data to delete.|
-  | valuesBucket | Read-only| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ------------ | --------------------------------- | ---- | ------------------------------------------------ |
+| uri          | string                            | Yes| URI of the data to delete.|
+| valuesBucket | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
 
-  Returns the number of deleted data records.
+**Return value**
+| Type| Description|
+| ---------------- | ------------------------ |
+| Promise\<number> | Promise used to return the number of deleted data records.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -674,26 +644,22 @@ DAHelper.delete(
 });
 ```
 
-#### DataAbilityHelper.update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>)
-
-- Functionality
-
-  Updates data records in the database. This method uses a callback to return the result.
+### update
 
-- Parameters
+update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<number>): void
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri          | Read-only| string                            | Yes| URI of the data to update.|
-  | valuesBucket | Read-only| rdb.ValuesBucket                  | Yes| New values.|
-  | predicates   | Read-only| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
-  | callback     | Read-only| AsyncCallback\<number>            | Yes| Callback used to return the result.|
+Updates data records in the database. This method uses a callback to return the result.
 
-- Return value
+**Parameters**
 
-  Returns the number of updated data records.
+| Name| Type| Mandatory| Description|
+| ------------ | --------------------------------- | ---- | ------------------------------------------------ |
+| uri          | string                            | Yes| URI of the data to update.|
+| valuesBucket | rdb.ValuesBucket                  | Yes| New values.|
+| predicates   | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+| callback     | AsyncCallback\<number>            | Yes| Callback used to return the number of updated data records.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -717,25 +683,26 @@ DAHelper.update(
 });
 ```
 
-#### DataAbilityHelper.update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates)
+### update
 
-- Functionality
+update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.DataAbilityPredicates): Promise\<number>
 
-  Updates data records in the database. This method uses a promise to return the result.
+Updates data records in the database. This method uses a promise to return the result.
 
-- Parameters
+**Parameters**
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ------------ | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri          | Read-only| string                            | Yes| URI of the data to update.|
-  | valuesBucket | Read-only| rdb.ValuesBucket                  | Yes| New values.|
-  | predicates   | Read-only| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+| Name| Type| Mandatory| Description|
+| ------------ | --------------------------------- | ---- | ------------------------------------------------ |
+| uri          | string                            | Yes| URI of the data to update.|
+| valuesBucket | rdb.ValuesBucket                  | Yes| New values.|
+| predicates   | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
 
-- Return value
+**Return value**
+| Type| Description|
+| ---------------- | -------------------------------------------- |
+| Promise\<number> | Promise used to return the number of updated data records.|
 
-  Returns the number of updated data records.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -759,26 +726,22 @@ DAHelper.update(
 });
 ```
 
-#### DataAbilityHelper.query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<ResultSet>)
-
-- Functionality
+### query
 
-  Queries data in the database. This method uses a callback to return the result.
+query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates, callback: AsyncCallback\<ResultSet>): void
 
-- Parameters
+Queries data in the database. This method uses a callback to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---------- | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri        | Read-only| string                            | Yes| URI of the data to query.|
-  | columns    | Read-only| rdb.ValuesBucket                  | Yes| Columns to query. If this parameter is **null**, all columns will be queried.|
-  | predicates | Read-only| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
-  | callback   | Read-only| AsyncCallback\<ResultSet>         | Yes| Callback used to return the result.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ---------- | --------------------------------- | ---- | ------------------------------------------------ |
+| uri        | string                            | Yes| URI of the data to query.|
+| columns    | rdb.ValuesBucket                  | Yes| Columns to query. If this parameter is **null**, all columns will be queried.|
+| predicates | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+| callback   | AsyncCallback\<ResultSet>         | Yes| Callback used to return the data queried.|
 
-  Returns the data queried.
-
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -786,7 +749,7 @@ import ohos_data_ability from '@ohos.data.dataability'
 var DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars=new Array({"value1"}, {"value2"}, {"value3"}, {"value4"});
+var cars=new Array("value1", "value2", "value3", "value4");
 let da = new ohos_data_ability.DataAbilityPredicates()
 DAHelper.query(
     "dataability:///com.example.DataAbility",
@@ -799,25 +762,26 @@ DAHelper.query(
 
 
 
-#### DataAbilityHelper.query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates)
-
-- Functionality
+### query
 
-  Queries data in the database. This method uses a promise to return the result.
+query(uri: string, columns: Array\<string>, predicates: dataAbility.DataAbilityPredicates): Promise\<ResultSet>
 
-- Parameters
+Queries data in the database. This method uses a promise to return the result.
 
-  | Name| Readable/Writable| Type| Mandatory| Description|
-  | ---------- | -------- | --------------------------------- | ---- | ------------------------------------------------ |
-  | uri        | Readable and writable| string                            | Yes| URI of the data to query.|
-  | columns    | Readable and writable| rdb.ValuesBucket                  | Yes| Columns to query. If this parameter is **null**, all columns will be queried.|
-  | predicates | Readable and writable| dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
+**Parameters**
 
-- Return value
+| Name| Type| Mandatory| Description|
+| ---------- | --------------------------------- | ---- | ------------------------------------------------ |
+| uri        | string                            | Yes| URI of the data to query.|
+| columns    | rdb.ValuesBucket                  | Yes| Columns to query. If this parameter is **null**, all columns will be queried.|
+| predicates | dataAbility.DataAbilityPredicates | Yes| Filter criteria. You should define the processing logic when this parameter is **null**.|
 
-  Returns the data queried.
+**Return value**
+| Type| Description|
+| ------------------- | -------------- |
+| Promise\<ResultSet> | Promise used to return the data queried.|
 
-- Example
+**Example**
 
 ```js
 import featureAbility from '@ohos.ability.featureAbility'
@@ -825,7 +789,7 @@ import ohos_data_ability from '@ohos.data.dataability'
 var DAHelper = featureAbility.acquireDataAbilityHelper(
     "dataability:///com.example.DataAbility"
 );
-var cars=new Array({"value1"}, {"value2"}, {"value3"}, {"value4"});
+var cars=new Array("value1", "value2", "value3", "value4");
 let da = new ohos_data_ability.DataAbilityPredicates()
 DAHelper.query(
     "dataability:///com.example.DataAbility",
diff --git a/en/application-dev/reference/apis/js-apis-service-extension-context.md b/en/application-dev/reference/apis/js-apis-service-extension-context.md
index fa46ef6df1..de067acf57 100644
--- a/en/application-dev/reference/apis/js-apis-service-extension-context.md
+++ b/en/application-dev/reference/apis/js-apis-service-extension-context.md
@@ -1,6 +1,6 @@
 # ServiceExtensionContext
 
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note:**
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
 > The initial APIs of this module are supported since API 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 
@@ -29,8 +29,8 @@ Starts an ability. This method uses a callback to return the result.
       "abilityName": "com.example.myapp.MyAbility"
   };
   this.context.startAbility(want, (err) => {
-      console.log('startAbility result:' + JSON.stringfy(err);
-  }  
+      console.log('startAbility result:' + JSON.stringfy(err));
+  });
   ```
 
 
@@ -58,7 +58,7 @@ Starts an ability. This method uses a promise to return the result.
   };
   this.context.startAbility(want).then((data) => {
       console.log('success:' + JSON.stringfy(data));
-  )).catch((error) => {
+  }).catch((error) => {
       console.log('failed:' + JSON.stringfy(error));
   });
   ```
@@ -78,8 +78,8 @@ Terminates this ability. This method uses a callback to return the result.
 - Example
   ```
   this.context.terminateSelf((err) => {
-      console.log('terminateSelf result:' + JSON.stringfy(err);
-  }
+      console.log('terminateSelf result:' + JSON.stringfy(err));
+  });
   ```
 
 
@@ -98,7 +98,7 @@ Terminates this ability. This method uses a promise to return the result.
   ```
   this.context.terminateSelf(want).then((data) => {
       console.log('success:' + JSON.stringfy(data));
-  )).catch((error) => {
+  }).catch((error) => {
       console.log('failed:' + JSON.stringfy(error));
   });
   ```
@@ -128,8 +128,8 @@ Connects this ability to a Service ability.
       "abilityName": "com.example.myapp.MyAbility"
   };
   let options = {
-      onConnect: function(elementName, proxy) {}
-      onDisConnect: function(elementName) {}
+      onConnect: function(elementName, proxy) {},
+      onDisConnect: function(elementName) {},
       onFailed: function(code) {}
   }
   let connection = this.context.connectAbility(want,options);
@@ -151,8 +151,8 @@ Disconnects this ability from the Service ability. This method uses a callback t
 - Example
   ```
   this.context.disconnectAbility(connection, (err) => { // connection is the return value of connectAbility.
-      console.log('terminateSelf result:' + JSON.stringfy(err);
-  }
+      console.log('terminateSelf result:' + JSON.stringfy(err));
+  });
   ```
 
 
@@ -176,7 +176,7 @@ Disconnects this ability from the Service ability. This method uses a promise to
   ```
   this.context.disconnectAbility(connection).then((data) => { // connection is the return value of connectAbility.
       console.log('success:' + JSON.stringfy(data));
-  )).catch((error) => {
+  }).catch((error) => {
       console.log('failed:' + JSON.stringfy(error));
   });
   ```
diff --git a/en/application-dev/reference/apis/js-apis-service-extension.md b/en/application-dev/reference/apis/js-apis-service-extension.md
index 22f46948c0..3696ec05ec 100644
--- a/en/application-dev/reference/apis/js-apis-service-extension.md
+++ b/en/application-dev/reference/apis/js-apis-service-extension.md
@@ -1,6 +1,6 @@
 # ServiceExtension
 
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **Note:**
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
 > The initial APIs of this module are supported since API 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
 
@@ -39,8 +39,10 @@ Called when an extension is created to initialize the service logic.
 
 - Example
   ```
-  onCreate(want) {
+  class ServiceExt extends ServiceExtension {
+    onCreate(want) {
       console.log('onCreate, want:' + want.abilityName);
+    }
   }
   ```
 
@@ -53,9 +55,10 @@ Called when this extension is destroyed to clear resources.
 
 - Example
   ```
-  onDestroy() {
+  class ServiceExt extends ServiceExtension {
+    onDestroy() {
       console.log('onDestroy');
-      destory();
+    }
   }
   ```
 
@@ -74,8 +77,10 @@ Called after **onCreate** is invoked when an ability is started by calling **sta
 
 - Example
   ```
-  onRequest(want: Want, startId: number) {
+  class ServiceExt extends ServiceExtension {
+    onRequest(want, startId) {
       console.log('onRequest, want:' + want.abilityName);
+    }
   }
   ```
 
@@ -106,10 +111,11 @@ Called after **onCreate** is invoked when an ability is started by calling **con
       onRemoteRequest(code, data, reply, option) {
       }
   }
-  ...
-  onConnect(want) {
+  class ServiceExt extends ServiceExtension {
+    onConnect(want) {
       console.log('onConnect , want:' + want.abilityName);
       return new StubTest("test");
+    }
   }
   ```
 
@@ -127,7 +133,9 @@ Called when the ability is disconnected.
 
 - Example
   ```
-  onDisconnect(want) {
+  class ServiceExt extends ServiceExtension {
+    onDisconnect(want) {
       console.log('onDisconnect, want:' + want.abilityName);
+    }
   }
   ```
diff --git a/zh-cn/application-dev/reference/apis/js-apis-dataAbilityHelper.md b/zh-cn/application-dev/reference/apis/js-apis-dataAbilityHelper.md
index 3c0e4627e4..7985887426 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-dataAbilityHelper.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-dataAbilityHelper.md
@@ -44,6 +44,8 @@ DAHelper.openFile(
 
 openFile(uri: string, mode: string): Promise\<number>
 
+在指定的远程路径中打开文件（promise形式）。
+
 **参数：**
 
 | 名称 | 类型   | 必填 | 描述                     |
@@ -270,7 +272,7 @@ normalizeUri(uri: string, callback: AsyncCallback\<string>): void
 | 名称     | 类型                   | 必填 | 描述                                                         |
 | -------- | ---------------------- | ---- | ------------------------------------------------------------ |
 | uri      | string                 | 是   | 指示要规范化的uri对象。                                      |
-| callback | AsyncCallback\<string> | 是   | 回调方法。如果数据功能支持uri规范化或null，则返回规范化uri对象。 |
+| callback | AsyncCallback\<string> | 是   | 回调方法。如果数据功能支持uri规范化，则返回规范化uri对象；否则返回null。 |
 
 **示例：**
 
@@ -301,7 +303,7 @@ normalizeUri(uri: string): Promise\<string>
 **返回值：**
 | 类型             | 说明                                                   |
 | ---------------- | ------------------------------------------------------ |
-| Promise\<string> | 如果数据功能支持uri规范化或null，则返回规范化uri对象。 |
+| Promise\<string> | 如果数据功能支持uri规范化，则返回规范化uri对象；否则返回null。 |
 
 **示例：**
 
@@ -698,7 +700,7 @@ update(uri: string, valuesBucket: rdb.ValuesBucket, predicates: dataAbility.Data
 **返回值：**
 | 类型             | 说明                                         |
 | ---------------- | -------------------------------------------- |
-| Promise\<number> | 返回值为Promise对象，Promise中包含应用信息。 |
+| Promise\<number> | 返回更新的数据记录数。 |
 
 **示例：**
 
-- 
GitLab