update docs

Signed-off-by: Nester.zhou <ester.zhou@huawei.com>

en/application-dev/reference/apis/js-apis-settings.md

 # Settings
 
-> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
+> **NOTE**<br>
 > The initial APIs of this module are supported since API version 8. Updates will be marked with a superscript to indicate their earliest API version.
 
 
@@ -23,21 +23,24 @@ Obtains the URI of a data item.
 
 **System capability**: SystemCapability.Applictaions.settings.Core
 
-- Parameters
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
+**Parameters**
 
-- Return value
-  | Type| Description|
-  | -------- | -------- |
-  | string | URI of the data item.|
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
 
-- Example
-  ```typescript
-   // Obtain the URI of a data item.
-   let urivar = settings.getUriSync('settings.screen.brightness');  
-  ```
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| string | URI of the data item.|
+
+**Example**
+
+```typescript
+ // Obtain the URI of a data item.
+ let urivar = settings.getUriSync('settings.screen.brightness');  
+```
 
 
 ## settings.getValueSync
@@ -48,28 +51,30 @@ Obtains the value of a data item.
 
 **System capability**: SystemCapability.Applictaions.settings.Core
 
-- Parameters
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | dataAbilityHelper | [DataAbilityHelper](js-apis-dataAbilityHelper.md) | Yes| **DataAbilityHelper** class.|
-  | name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
-  | defValue | string | Yes| Default value This parameter is user-defined. If it is not found in the database, the default value is returned.|
+**Parameters**
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| dataAbilityHelper | [DataAbilityHelper](js-apis-dataAbilityHelper.md) | Yes| **DataAbilityHelper** class.|
+| name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
+| defValue | string | Yes| Default value This parameter is user-defined. If it is not found in the database, the default value is returned.|
+
+**Return value**
+
+| Type| Description|
+| -------- | -------- |
+| string | Value of the data item.|
 
-- Return value
-  | Type| Description|
-  | -------- | -------- |
-  | string | Value of the data item.|
+**Example**
 
-- Example
-  ```typescript
+```typescript
   import featureAbility from '@ohos.ability.featureAbility';
 
-  // Obtain the value of 'settings.screen.brightness' (this data item already exists in the database).
-  let brightness = 'settings.screen.brightness';
-  let uri = settings.getUriSync(brightness);
-  let helper = featureAbility.acquireDataAbilityHelper(uri);
-  let value = settings.getValueSync(helper, brightness, '10');
-  ```
+// Obtain the value of 'settings.screen.brightness' (this data item already exists in the database).
+let brightness = 'settings.screen.brightness';
+let uri = settings.getUriSync(brightness);
+let helper = featureAbility.acquireDataAbilityHelper(uri);
+let value = settings.getValueSync(helper, brightness, '10');
+```
 
 
 ## settings.setValueSync
@@ -77,32 +82,36 @@ Obtains the value of a data item.
 setValueSync(dataAbilityHelper: DataAbilityHelper, name: string, value: string): boolean
 
 Sets the value of a data item.
+
 If the specified data item exists in the database, the **setValueSync** method updates the value of the data item. If the data item does not exist in the database, the **setValueSync** method inserts the data item into the database.
 
 **Required permissions**: ohos.permission.WRITE_SYSTEM_SETTING
 
 **System capability**: SystemCapability.Applictaions.settings.Core
 
-- Parameters
-  | Name| Type| Mandatory| Description|
-  | -------- | -------- | -------- | -------- |
-  | dataAbilityHelper | [DataAbilityHelper](js-apis-dataAbilityHelper.md) | Yes| **DataAbilityHelper** class.|
-  | name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
-  | value | string | Yes| Value of the data item.|
+**Parameters**
+
+| Name| Type| Mandatory| Description|
+| -------- | -------- | -------- | -------- |
+| dataAbilityHelper | [DataAbilityHelper](js-apis-dataAbilityHelper.md) | Yes| **DataAbilityHelper** class.|
+| name | string | Yes| Name of the target data item. Data items can be classified as follows:<br> <ul><li>Existing data items in the database, for example:<br></li> <ul><li>Brightness: 'settings.screen.brightness'<br> </li>  <li>Time format: 'settings.time.format'<br> </li></ul> <li>Custom data items</li></ul>|
+| value | string | Yes| Value of the data item.|
 
-- Return value
-  | Type| Description|
-  | -------- | -------- |
-  | boolean | Result indicating whether the value is set successfully. Returns **true** if the value is set successfully; returns **false** otherwise.|
+**Return value**
 
-- Example
-  ```typescript
+| Type| Description|
+| -------- | -------- |
+| boolean | Result indicating whether the value is set successfully. Returns **true** if the value is set successfully; returns **false** otherwise.|
+
+**Example**
+
+```typescript
   import featureAbility from '@ohos.ability.featureAbility';
 
-  // Update the value of 'settings.screen.brightness'. (As this data item exists in the database, the setValueSync 
-     method will update the value of the data item.)
-  let brightness = 'settings.screen.brightness';
-  let uri = settings.getUriSync(brightness);
-  let helper = featureAbility.acquireDataAbilityHelper(uri);
-  let ret = settings.setValueSync(helper, brightness, '100');
-  ```
+// Update the value of 'settings.screen.brightness'. (As this data item exists in the database, the setValueSync 
+   method will update the value of the data item.)
+let brightness = 'settings.screen.brightness';
+let uri = settings.getUriSync(brightness);
+let helper = featureAbility.acquireDataAbilityHelper(uri);
+let ret = settings.setValueSync(helper, brightness, '100');
+```
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en/application-dev/reference/apis/js-apis-system-parameter.md

 # System Parameter
 
 > **NOTE**<br>
->
 > - The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 > - This is a system API and cannot be called by third-party applications.
 
@@ -49,7 +48,7 @@ try {
 
 get(key: string, callback: AsyncCallback&lt;string&gt;): void
 
-Obtains the value of the attribute with the specified key.
+Obtains the value of the attribute with the specified key. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.Startup.SysInfo
 
@@ -80,7 +79,7 @@ try {
 
 get(key: string, def: string, callback: AsyncCallback&lt;string&gt;): void
 
-Obtains the value of the attribute with the specified key.
+Obtains the value of the attribute with the specified key. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.Startup.SysInfo
 
@@ -89,7 +88,7 @@ Obtains the value of the attribute with the specified key.
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
 | key | string | Yes| Key of the system attribute.|
-| def | string | Yes| Default Value|
+| def | string | Yes| Default value.|
 | callback | AsyncCallback&lt;string&gt; | Yes| Callback used to return the result.|
 
 **Example**
@@ -113,7 +112,7 @@ try {
 
 get(key: string, def?: string): Promise&lt;string&gt;
 
-Obtains the value of the attribute with the specified key.
+Obtains the value of the attribute with the specified key. This API uses a promise to return the result.
 
 **System capability**: SystemCapability.Startup.SysInfo
 
@@ -122,7 +121,7 @@ Obtains the value of the attribute with the specified key.
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
 | key | string | Yes| Key of the system attribute.|
-| def | string | No| Default Value|
+| def | string | No| Default value.|
 
 **Return value**
 
@@ -176,7 +175,7 @@ try {
 
 set(key: string, value: string, callback: AsyncCallback&lt;void&gt;): void
 
-Sets a value for the attribute with the specified key.
+Sets a value for the attribute with the specified key. This API uses an asynchronous callback to return the result.
 
 **System capability**: SystemCapability.Startup.SysInfo
 
@@ -208,7 +207,7 @@ try {
 
 set(key: string, value: string): Promise&lt;void&gt;
 
-Sets a value for the attribute with the specified key.
+Sets a value for the attribute with the specified key. This API uses a promise to return the result.
 
 **System capability**: SystemCapability.Startup.SysInfo
 
@@ -217,7 +216,7 @@ Sets a value for the attribute with the specified key.
 | Name| Type| Mandatory| Description|
 | -------- | -------- | -------- | -------- |
 | key | string | Yes| Key of the system attribute.|
-| value| string | Yes| System attribute value to set.|
+| value| string | Yes | System attribute value to set.|
 
 **Return value**
 

en/readme/common-event-notification.md

@@ -36,10 +36,10 @@ Each application can subscribe to common events as required. After your applicat
 
 ## How to Use
 
-For details, see *CommonEvent Development Guidelines*.
+For details, see [Common Event Development](../application-dev/notification/common-event.md).
 
 ## Repositories Involved
 
 Common Event and Notification
 
-[**notification_ces_standard**](https://gitee.com/openharmony/notification_ces_standard)
+[**notification_ces_standard**](https://gitee.com/openharmony/notification_ces_standard)
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