Document (#19832)

Author

Tseng, Y.-H.

Title

Keyword extraction techniques and relevance feedback

Source

Bulletin of the Library Association of China. 1997, no.59, Dec., S.59-64

Year

1997

Abstract

Automatic keyword extraction is an important and fundamental technology in an advanced information retrieval systems. Briefly compares several major keyword extraction methods, lists their advantages and disadvantages, and reports recent research progress in Taiwan. Also describes the application of a keyword extraction algorithm in an information retrieval system for relevance feedback. Preliminary analysis shows that the error rate of extracting relevant keywords is 18%, and that the precision rate is over 50%. The main disadvantage of this approach is that the extraction results depend on the retrieval results, which in turn depend on the data held by the database. Apart from collecting more data, this problem can be alleviated by the application of a thesaurus constructed by the same keyword extraction algorithm

Footnote

[In Chinesisch]

Theme

Indexierungsstudien

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