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BOM(5)                      BSD File Formats Manual                     BOM(5)

NAME
     bom -- bill of materials

DESCRIPTION
     The Mac OS X Installer uses a file system "bill of materials" to determine which files to install,
     remove, or upgrade. A bill of materials, bom, contains all the files within a directory, along with
     some information about each file. File information includes: the file's UNIX permissions, its owner and
     group, its size, its time of last modification, and so on.  Also included are a checksum of each file
     and information about hard links.

     The bill of materials for installed packages are found within the package receipts located in
     /Library/Receipts.

SEE ALSO
     ditto(1), lsbom(8), mkbom(8)

BUGS
     Mac OS X's bill of materials format is not compatible with formats from older operating systems.

HISTORY
     The bill of materials file appeared in NeXTSTEP to support installation.  The file format was updated
     and extended for Mac OS X 10.0.  The format was extended to support 64 bit file sizes with OS X 10.3.

Mac OS X                       28 September 2006                      Mac OS X

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