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Extending Standards for CD-ROM
6/93 Dr. Dobbs Journal, USA: Extending Standards for CD-ROM, Lynne Greer Jolitz . Although ISO-compliant CD-ROMs are interchangeable and usable on any type of system, the minimalism that made the ISO-9660 standard successful is sometimes too minimal. Consequently, the Rock Ridge Group and others have developed extensions to give new life to CD-ROMs.
Extensions to ISO-9660 can make a CD-ROM appear like a given target operating system (such as a POSIX-compliant filesystem). By encoding these extensions (using the sharing-use protocols), you can allow for separate sets of attributes for the same filesystem. This lets you organize extended information for different systems (such as VMS, DOS, and UNIX) in a nonconflicting way. Also, any system that only understands ISO-9660 without any extensions can still gain access to the files and obtain the exact same contents of data for a file; you aren't precluding any use of CD-ROM by the use of extensions, you're simply extending the scope of use of the information. "
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