File Contents
The ISO 9660 standard allows an optional extended attributes record (XAR) stored at the beginning of the file′s extent which can contain additional file attribute information.
Extension attributes are simply a way to extend the attributes of files. Since attributes vary according to the user, most everyone has a different opinion on what a file attribute should specify.
The Rock Ridge:
- extensions is an example of extended attributes to make POSIX alike file attributes (much like UNIX).
- can also be used in a networked situation, since a single CD-ROM can be exported to a variety of different operating systems viewing the same files, while appearing to be in the local system′s native file structure format.
- is heading in the same "universal" direction of other file systems like the Network File System (NFS).