The 4-Characters type of small alphabets and symbols are reserved for SophiaFramework UNIVERSE.

The prefix of the abstract class type is '.', and that of the widget class type is '+'.

The other prefixes of type are 'r' for the root-related class, 'n' for container-related class, 'w' for window-related class, 'd' for dialog-related class, 'm' for menu-related class, 'c' for control-related class, 'f' for frame-related class.