1# ArkUI Subsystem Changelog 2 3## cl.arkui.1 Change of Certain Predicates of uiAppearance from Public APIs to System APIs 4 5Changed the namespace **uiAppearance** and its internal **DarkMode** enum predicates from public APIs to system APIs. 6 7**Change Impact** 8 9None. The namespace **uiAppearance** and its internal **DarkMode** enum are used only by system APIs before and after the change. 10 11**Key API/Component Changes** 12 13The system API description is added to the following APIs: 14 15- declare namespace uiAppearance 16 17- enum DarkMode 18 19- ALWAYS_DARK = 0 20 21- ALWAYS_LIGHT = 1 22