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