XrSemanticLabelsSupportFlagBitsFB(3) Manual Page

XR_SEMANTIC_LABELS_SUPPORT_MULTIPLE_SEMANTIC_LABELS_BIT_FB — If set, and the runtime reports the extensionVersion as 2 or greater, the runtime may return multiple semantic labels separated by a comma without spaces. Otherwise, the runtime must return a single semantic label.

XR_SEMANTIC_LABELS_SUPPORT_ACCEPT_DESK_TO_TABLE_MIGRATION_BIT_FB — If set, and the runtime reports the extensionVersion as 3 or greater, the runtime must return "TABLE" instead of "DESK" as a semantic label to the application. Otherwise, the runtime must return "DESK" instead of "TABLE" as a semantic label to the application, when applicable.

XR_SEMANTIC_LABELS_SUPPORT_ACCEPT_INVISIBLE_WALL_FACE_BIT_FB — If set, and the runtime reports the extensionVersion as 4 or greater, the runtime may return "INVISIBLE_WALL_FACE" instead of "WALL_FACE" as a semantic label to the application in order to represent an invisible wall used to conceptually separate a space (e.g., separate a living space from a kitchen space in an open floor plan house even though there is no real wall between the two spaces) instead of a real wall. Otherwise, the runtime must return "WALL_FACE" as a semantic label to the application in order to represent both an invisible and real wall, when applicable.