Каковы правила определения идентификаторов свойств автомотива?

Question

Вот мои вопросы:

1.

enum VehiclePropertyType : int32_t {
    STRING          = 0x00100000,
    BOOLEAN         = 0x00200000,
    INT32           = 0x00400000,
    INT32_VEC       = 0x00410000,
    INT64           = 0x00500000,
    INT64_VEC       = 0x00510000,
    FLOAT           = 0x00600000,
    FLOAT_VEC       = 0x00610000,
    BYTES           = 0x00700000,

    /**
     * Any combination of scalar or vector types. The exact format must be
     * provided in the description of the property.
     */
    MIXED           = 0x00e00000,

    MASK            = 0x00ff0000
};

почему INT32 0x00400000, а не 0x00300000?

2.

enum VehicleArea : int32_t {
    GLOBAL      = 0x01000000,
    /** WINDOW maps to enum VehicleAreaWindow */
    WINDOW      = 0x03000000,
    /** MIRROR maps to enum VehicleAreaMirror */
    MIRROR      = 0x04000000,
    /** SEAT maps to enum VehicleAreaSeat */
    SEAT        = 0x05000000,
    /** DOOR maps to enum VehicleAreaDoor */
    DOOR        = 0x06000000,
    /** WHEEL maps to enum VehicleAreaWheel */
    WHEEL       = 0x07000000,

    MASK        = 0x0f000000,
};

почему WINDOW 0x03000000, а не 0x02000000?

3.

FUEL_DOOR_OPEN = (
        0x0308
        | VehiclePropertyGroup:SYSTEM
        | VehiclePropertyType:BOOLEAN
        | VehicleArea:GLOBAL),


RANGE_REMAINING = (
        0x0308
        | VehiclePropertyGroup:SYSTEM
        | VehiclePropertyType:FLOAT
        | VehicleArea:GLOBAL),

Каковы правила определения 0x0308, они имеют одинаковые значения?