# ArkUI Subsystem Changelog ## cl.arkui.1 Change of Certain Predicates of uiAppearance from Public APIs to System APIs Changed the namespace **uiAppearance** and its internal **DarkMode** enum predicates from public APIs to system APIs. **Change Impact** None. The namespace **uiAppearance** and its internal **DarkMode** enum are used only by system APIs before and after the change. **Key API/Component Changes** The system API description is added to the following APIs: - declare namespace uiAppearance - enum DarkMode - ALWAYS_DARK = 0 - ALWAYS_LIGHT = 1