Flash MX 2004.
item.name
Method; a string that specifies the name of the library item, which includes the folder structure. For example, if Symbol_1 is inside a folder called Folder_1, the name property of Symbol_1 is "Folder_1/Symbol_1".
The following example shows the name of the specified library item in the Output panel:
fl.trace(fl.getDocumentDOM().library.items[0].name);