Browse Prior Art Database

Use of Subfiles As an Internal Organization Method

IP.com Disclosure Number: IPCOM000119617D
Original Publication Date: 1991-Feb-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 55K

Publishing Venue

IBM

Related People

Friedl, TJ: AUTHOR [+3]

Abstract

Disclosed is a method of relating associated data to a single named entity on media through a logical media format that allows subfiles organization.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Use of Subfiles As an Internal Organization Method

      Disclosed is a method of relating associated data to a
single named entity on media through a logical media format that
allows subfiles organization.

      The current high volume removable media formats allow from 0 to
3 subfiles for each logical file on the media (expandable to 7
subfiles in future releases).

      These subfiles let an operating system tie associated data to
the original data file or object.

      The three subfiles are currently defined as:
1.   Data Subfile.  Where the 'data' is kept.  Generally, this is the
original user data.
2.   Extended Attributes Subfile.  An extended attribute is a method
of simply tying a 'name' together with a value.  This function lets
the system, application, or user define specific informational
packets that are to follow the 'file'.  For example, if an
application needed to define an office supervisor ID, indicating an
administration contact for the file, an extended attribute could be
created, such as SUPRCONT:Name of Supervisor.  This information is
then tied to the data contents directly.
3.   Alias Name Subfile.  This subfile is used to contain the name of
the 'original' file, when aliasing of file names is permitted.  It is
possible to have multiple names reference the same physical file.

      From a user's or application's point of view, there is only a
file which contains various types of information. All related data is
...