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Full-text index producing device for producing a full-text index and full-text data base retrieving device having the full-text index
Full-text index producing device for producing a full-text index and full-text data base retrieving device having the full-text index
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机译:用于产生全文索引的全文索引产生装置和具有该全文索引的全文数据库检索装置
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摘要
A full-text data base retrieving device retrieves a data base in accordance with a query. A full-text index has character location information representative of location of each of key character sequences of N characters that appear in the data base, where N is a positive integer. A query memory memorizes the query as a retrieval key character sequence. A separating section separates the retrieval key character sequence into a plurality of retrieval key character sequences of N characters to extract contexts as extracted contexts from the retrieval key character sequence in accordance with the retrieval key character sequences. A context classifying section classifies the extracted contexts into classified contexts having the classification numbers, respectively. An index retrieving section retrieves the full-text index in accordance with the sorts of the retrieval key character sequences and the classified contexts to read the character location information as a retrieval result out of the full-text index. A detecting section detects appearance locations of the retrieval key character sequence in the full-text data base to produce the appearance locations as a detected result.
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