Extensible rights expression processing system

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United States of America Patent

PATENT NO 7974923
APP PUB NO 20030144869A1
SERIAL NO

10298220

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Abstract

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Extensible grammar-based rights expression system for processing rights expressions including an interpreter with plug-in subcomponents, a validator, and a framework. In another embodiment, system includes a framework having an extensible architecture with extensibility points for adding extensions to the grammar, and an interpreter, the extensions defining semantics and syntax of new rights expressions. A method for processing rights expressions is also provided having the steps of registering plug-in components, making a programmatic call, finding and invoking appropriate plug-in components, evaluating the request against the grant, and returning an authorization result. In another embodiment, method includes the steps of providing an extensible grammar-based rights expression system having an extensible architecture with an interpreter, evaluating the request against the grant using the interpreter, and returning an authorization result. The method may include the step of adding new extensions to the rights expression system to allow processing of new rights expressions.

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Patent Owner(s)

  • CONTENTGUARD HOLDINGS, INC.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chancellor, Robert Ladera Ranch, US 3 57
DeMartini, Thomas Culver City, US 25 675
Fung, Joseph Zhung Yee Cerritos, US 8 248
Nguyen, Mai Buena Park, US 30 532
Ta, Thanh Huntington Beach, US 50 1300
Tieu, Vincent Hsiang Torrance, US 6 176
Tran, Duc Westminster, US 22 776
Valenzuela, Edgardo South Gate, US 16 360

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