MACROMEDIA FLASH 8-EXTENDING FLASH Manual page 17

Finally, some objects are subclasses of other objects, rather than being children of other
objects. An object that is a subclass of another object has methods and/or properties of its own
in addition to the methods and properties of the other object (the superclass). Subclasses share
the same level in the hierarchy as their superclass. For example, the Item object is a superclass
of the BitmapItem object (see
illustrated in the following outline:
01 Top-Level Functions and Methods
01 FLfile object
01 flash object (fl)
02 componentsPanel object
02 Document object
03 Filter object
03 Matrix object
03 Fill object
03 Stroke object
03 library object
04 Item object
04 BitmapItem object
04 folderItem object
04 fontItem object
04 SoundItem object
04 SymbolItem object
04 VideoItem object
03 Timeline object
04 Layer object
05 Frame object
06 Element object
07 Matrix object
Item object
( array)
fl.documents
( array
library.items
(subclass of Item
(subclass of Item
(subclass of Item
(subclass of Item
(subclass of Item
(subclass of Item
(
document.timelines
(
timeline.layers
( array
layer.frames
(frame.elements
(Element.matrix)
and BitmapItem object). These relationships are
)
object)
object)
object)
object)
object)
object)
array
)
array)
)
array)
The Flash Document Object Model 17