DOCUMENT:Q93604  20-JUL-1993  [W_NT]
TITLE   :ISO 9660 Support for CD-ROM
PRODUCT :Windows NT
PROD/VER:3.10
OPER/SYS:WINDOWS
KEYWORDS:

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The information in this article applies to:

 - Microsoft Windows NT operating system version 3.1
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Summary:

Windows NT supports ISO 9660 CD-ROM format, but does not support any
of the RockRidge CD-ROM format extensions. ISO 9660 is an
international standard that defines a file system for compact discs.
Almost all systems support ISO 9660.

More Information:

Level one ISO 9660 is similar to the MS-DOS file system. Filenames are
limited to eight single-case characters, a period, and a
three-character extension. Filenames cannot contain special or
extended characters, (no hyphens, tildes, equal or plus signs), only
single-case letters, numbers, and underscores. Directory names cannot
contain three-digit extensions, just eight single-case characters.

All alphabetic characters are in uppercase letters; some software maps
these to lowercase letters. Either the filename or the extension may
be empty, but not both ("F." and ".E" are both legal filenames).

There is a "file version number" that can range from 1 to 32,767 and
is separated from the extension by a semicolon. The file version
number is ignored on many systems.

Subdirectories are allowed to nest up to eight levels deep.

Level two ISO 9660 allows longer filenames, up to 32 characters;
however, most of the other restrictions still apply. Level two discs
cannot be used on some systems, such as MS-DOS.

The RockRidge extensions use some undefined fields in the ISO 9660
standard to allow full UNIX-like filenames, symbolic links, and deep
directories.

Additional reference words: 3.10

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