1# Bundle Manager Subsystem Changelog
2
3## cl.bundlemanager.1 Logic Used for Judging System Applications Changed
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5The **app-feature** field in the [signing certificate](../../../application-dev/security/app-provision-structure.md) is used to determine whether an application is a system application.
6* If **app-feature** is **hos_system_app**, the application is a system application.
7* If **app-feature** is not **hos_normal_app**, the application is a third-party application.
8
9**Change Impact**
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11If an application is located in **/system/app**, the path is configured in the **/****/etc/app/install_list.json** file, but **app-feature** is **hos_normal_app**, then the application cannot use system APIs.
12
13**Key API/Component Changes**
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15N/A
16
17**Adaptation Guide**
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19Check whether your application is a system application. If yes, change **app-feature** to **hos_system_app** and re-sign the HAP file.
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21
22## c2.bundlemanager.2 Added the dataUnclearable Field to the ApplicationInfo Struct
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24The **dataUnclearable** field is added to the [ApplicationInfo](https://gitee.com/openharmony/interface_sdk-js/blob/master/api/bundleManager/ApplicationInfo.d.ts) struct. For details, see [API reference](../../../application-dev/reference/apis/js-apis-bundle-ApplicationInfo.md).
25
26**Change Impact**
27
28N/A
29
30**Key API/Component Changes**
31
32The **dataUnclearable** field is added to the [ApplicationInfo](https://gitee.com/openharmony/interface_sdk-js/blob/master/api/bundleManager/ApplicationInfo.d.ts) struct. For details, see [API reference](../../../application-dev/reference/apis/js-apis-bundle-ApplicationInfo.md).
33
34**Adaptation Guide**
35
36N/A
37