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Protection Scheme for Multimedia Annotations

IP.com Disclosure Number: IPCOM000116510D
Original Publication Date: 1995-Sep-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Chaiken, RI: AUTHOR [+2]

Abstract

By instituting a protection scheme for annotations, users may now choose which of their annotations may not be overwritten, or relocated, or deleted.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Protection Scheme for Multimedia Annotations

      By instituting a protection scheme for annotations, users may
now choose which of their annotations may not be overwritten, or
relocated, or deleted.

      In the shared multimedia annotation system, annotations that
have been committed to the network may be relocated, its contents
modified, or entirely deleted.  These actions on the part of one user
are mirrored across the network on the desktops of all users in the
session.  A second class of annotations, viz., private annotations,
which are not committed to the network, may require protection from
the owner to prevent accidental overwriting or deletion or even
distribution.

      A protection scheme similar to the UNIX* file protection scheme
is visualized.  In the annotation subsystem, the UNIX
read-write-execute sequence has a different connotation.  Instead, it
is read-write-move.  Further, these settings can be set for the user
as well as the group.  In the case of owner settings, if the read-bit
is set to off, it prevents the user from reading his own annotation.
With the write-bit set to off, an annotation may not be deleted or
its contents modified.  With the move-bit set to off, the annotation
may not be relocated.  Other combinations are possible to permit
certain actions and to prevent other action.

      The same bit operations may be applied to committed annotations
to prevent other users in the collaborative session from reading,
m...