08898165 cites 155 patents.

A computer hardware-implemented method, system, and/or computer program product identifies a null set of synthetic event containing electronic files in a database of electronic files. A synthetic event, which is a non-executable descriptor of a set of context-related factors, is created. A context-based search of a database of electronic files is performed to identify a synthetic event containing electronic file that includes the synthetic event. In response to determining that there are no electronic files in the database of electronic files that contain the synthetic event, a set of binary data is transmitted/broadcast. The set of binary data includes a notice that there are no synthetic event electronic files in the database of electronic files.

Title
Identification of null sets in a context-based electronic document search
Application Number
13/540295
Publication Number
8898165 (B2)
Application Date
July 2, 2012
Publication Date
November 25, 2014
Inventor
Josko Silobrcic
Swampscott
MA, US
James R Kraemer
Santa Fe
NM, US
Robert R Friedlander
Southbury
CT, US
Agent
Law Office of Jim Boice
John R Pivnichny
Assignee
International Business Machines Corporation
NY, US
IPC
G06F 7/00
G06F 17/30
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