International Business Machines Corporation

Emc Corporation

David M Choy

Lily Liang

Kenneth Carlin Nelson

Tawei Hu

Lei Chang

Randal James Richardt

James Lin

Khanh M Le

Edward Joseph Perry

Andy I-Shin Wang

Federico Barbic

Jeroen Van Rotterdam

A highly efficient access control system and method employing XACML standard based policies and rules provides high performance resource access control of information systems of large enterprises. The system and method extracts plain rules from the XACML policies, transforms the plain rules into atomic rules, and compresses and indexes the atomic rules for fast lookup and retrieval. Access requests are decomposed into atomic requests which are compressed using the same value mapping as the rules. Index keys derived from compressed atomic request triplets are used to look up applicable rules which are used to evaluate requests for access to information system resources.

Efficient XACML access control processing

Methods, systems, and program products for managing multimedia content. These are built upon a combination of a high level content model for specific multimedia content types and a low level physical for mapping to a data engine. The method, system, and program product include representing multimedia content management objects and managing the objects in a relational database. The relational database is adapted for representing data in a plurality of relational database tables, where each of the relational database tables has at least one row with a plurality of columns. Content is managed by associating the object as an item to a row in a first relational database table; and associating additional components, if any, of the object to additional relational database tables.

Method, system, and program product to support multiple content-management data models

A content management system is provided including a plurality of tables forming a tree-based storage hierarchy. The system includes a library server having a stored procedure which creates a hierarchical tree-based storage structure having any number of child components horizontally and any number of component types vertically thus specifying a tree topology. Advantageously, a single invocation of the stored procedure will create the specified tree-based data storage structure which is stored in the library server.

Content management system and methodology for implementing a complex object using nested/recursive structures

A relational database is disclosed which includes a number of target tables each exhibiting a different type, such as a general contact table, a personal contact table and a department contact table. The relational database includes a super-column which is divided into a number of columns corresponding to the number of types of target tables. A respective column is allocated in the super-column for each of the types of the target tables. Valuable system memory space is consequently conserved. Multiple-typed tables and multi-targeted tables are supported, and multi-version data storage capabilities are provided.

Version-enabled, multi-typed, multi-targeting referential integrity relational database system and methodology

In a searching for library documents that match the content of a given sequence of query words, a set of equivalent words are defined for each query word along with a corresponding word equivalence value assigned to each equivalent word. Target sequences of words in a library document which match the sequence of query words are located according to a set of matching criteria. The similarity value of each target sequence is evaluated as a function of the corresponding equivalence values of words included therein. Based upon the similarity values of its target sequences, a relevance factor is then obtained for each library document.

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Los Altos, CA, United States of America

David M Choy