Query revision using known highly-ranked queries

G - Physics – 06 – F

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G06F 17/30 (2006.01)

Patent

CA 2603718

An information retrieval system includes a query revision architecture providing one or more query revisers, each of which implements a query revision strategy. A query rank reviser suggests known highly-ranked queries as revisions to a first query by initially assigning a rank to all queries, and identifying a set of known highly-ranked queries (KHRQ). Queries with a strong probability of being revised to a KHRQ are identified as nearby queries (NQ). Alternative queries that are KHRQs are provided as candidate revisions for a given query. For alternative queries that are NQs, the corresponding known highly-ranked queries are provided as candidate revisions.

L'invention concerne un système d'extraction d'informations qui comporte une architecture de révision d'interrogations fournissant au moins un réviseur d'interrogations, chacun appliquant une stratégie de révision d'interrogations. Un réviseur de catégorie d'interrogation suggère des interrogations de catégorie supérieure connues comme révisions d'une première interrogation en attribuant initialement une catégorie à toutes les interrogations, et en identifiant un ensemble d'interrogations de catégorie supérieure connues (KHRQ). Les interrogations ayant une forte probabilité d'être révisées selon un KHRQ sont identifiées comme interrogations de proximité (NQ). Des interrogations possibles qui sont des KHRQ sont fournies comme révisions candidates pour une interrogation donnée. S'agissant d'interrogations possibles qui sont des NQ, les interrogations de catégorie supérieure connues correspondantes sont fournies comme révisions candidates.

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