0715244-A1 is referenced by 164 patents and cites 3 patents.

A system for controlling use and distribution of digital works. The present invention allows the owner of a digital work to attach usage rights (1450) to their work. The usage rights define how the individual digital work may be used and distributed (1451). Instances of usage rights are defined using a flexible and extensible usage rights grammar. Conceptually, a right in the usage rights grammar is a label associated with a predetermined behavior and conditions to exercising the right. The behavior of a usage right is embodied in a predetermined set (1452) of usage transactions steps. The usage transaction steps further check all conditions (1453-1457) which must be satisfied before the right may be exercised. These usage transaction steps define a protocol for requesting the exercise of a right and the carrying out of a right.

Title
System for controlling the distribution and use of digital works utilizing a usage rights grammar
Application Number
EP19950308417 19951123
Publication Number
0715244 (A1)
Application Date
November 23, 1995
Publication Date
June 5, 1996
Inventor
Stefik Mark J
US
Assignee
Xerox
US
IPC
G06F 01/00
H04N 05/91
H04L 09/32
G09C 01/00
G06Q 50/00
G06Q 30/00
G06F 21/22
G06F 21/00
G06F 01/00
G06F 12/00
H04N 05/91
H04L 09/32
G09C 01/00
G06Q 50/00
G06Q 30/00
G06F 21/24
G06F 21/22
G06F 21/00
G06F 01/00
G06F 12/00
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