CA2248793A1 - Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching - Google Patents

Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching

Info

Publication number
CA2248793A1
CA2248793A1 CA002248793A CA2248793A CA2248793A1 CA 2248793 A1 CA2248793 A1 CA 2248793A1 CA 002248793 A CA002248793 A CA 002248793A CA 2248793 A CA2248793 A CA 2248793A CA 2248793 A1 CA2248793 A1 CA 2248793A1
Authority
CA
Canada
Prior art keywords
records
thesaurus
record
query
collections
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002248793A
Other languages
French (fr)
Other versions
CA2248793C (en
Inventor
David James Miller
Xin Allan Lu
John D. Holt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LexisNexis Inc
Original Assignee
Lexis-Nexis, A Division Of Reed Elsevier Inc.
David James Miller
Xin Allan Lu
John D. Holt
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lexis-Nexis, A Division Of Reed Elsevier Inc., David James Miller, Xin Allan Lu, John D. Holt filed Critical Lexis-Nexis, A Division Of Reed Elsevier Inc.
Publication of CA2248793A1 publication Critical patent/CA2248793A1/en
Application granted granted Critical
Publication of CA2248793C publication Critical patent/CA2248793C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/30—Information retrieval; Database structures therefor; File system structures therefor of unstructured textual data
    • G06F16/36—Creation of semantic tools, e.g. ontology or thesauri
    • G06F16/374—Thesaurus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/912—Applications of a database
    • Y10S707/917—Text
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99934—Query formulation, input preparation, or translation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99933—Query processing, i.e. searching
    • Y10S707/99935—Query augmenting and refining, e.g. inexact access
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S707/00—Data processing: database and file management or data structures
    • Y10S707/99931—Database or file accessing
    • Y10S707/99937—Sorting

Abstract

A statistical thesaurus is built dynamically, from the same text collection that is being searched, allowing improved generation of expanded query terms.
The thesaurus is dynamic in that thesaurus records are collected, ranked, accessed, and applied dynamically. Thesaurus "records" are actually formed as indexed documents arranged in "collections". The collections are preferably distinguished based on text source. Each record has terms assembled in indexed groups which inherently reflect a ranking based on relevance to an initial query. After an initial query is received, the appropriate collection(s) of records may be searched by a conventional search and retrieval engine, the searches inherently returning records ranked by degree of relevance due the record indexing scheme. A record ranking scheme avoids contamination of relevant records by less relevant records. The record selection and the expansion query term generation processes are each divided into parallel threads. The separate threads correspond to respective text sources to enable the improved expansion query term generation to be provided in real time.
CA002248793A 1996-03-15 1997-03-07 Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching Expired - Lifetime CA2248793C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/616,883 US5926811A (en) 1996-03-15 1996-03-15 Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching
US08/616,883 1996-03-15
PCT/US1997/003185 WO1997034242A1 (en) 1996-03-15 1997-03-07 Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching

Publications (2)

Publication Number Publication Date
CA2248793A1 true CA2248793A1 (en) 1997-09-18
CA2248793C CA2248793C (en) 2002-04-30

Family

ID=24471373

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002248793A Expired - Lifetime CA2248793C (en) 1996-03-15 1997-03-07 Statistical thesaurus, method of forming same, and use thereof in query expansion in automated text searching

Country Status (5)

Country Link
US (1) US5926811A (en)
EP (1) EP0901660A4 (en)
AU (1) AU2060997A (en)
CA (1) CA2248793C (en)
WO (1) WO1997034242A1 (en)

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US11144994B1 (en) 2014-08-18 2021-10-12 Street Diligence, Inc. Computer-implemented apparatus and method for providing information concerning a financial instrument

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