Presentation	1999/7/22 Application of Structured Index to Full-Text Search ATSUSHI MATSUMURA, ATSUHIRO TAKASU, JUN ADACHI,
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Abstract(in English)	Although keyword-based retrieval methods occupy the major position in document retrieval methods, it has obviously limitation in retrieval effectiveness because it is difficult to satisfy users' requests using only query words and its statistical characteristics. Thus we have developed a method named Structured Index to enhance retrieval effectiveness using dependency relationships between words in sentences of documents and queries. We show that our method is more effective than TF-IDF method through the retrieval experiments using documents titles. In our study, in order to aplying our method to full-text search, we apply Structured Index system to documents' abstructs. The experimental results show that our method's normalized precision is 20% higher than the TF-IDF method.
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Paper #	DE99-38
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Committee	DE
Conference Date	1999/7/22(1days)
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Registration To	Data Engineering (DE)
Language	JPN
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Title (in English)	Application of Structured Index to Full-Text Search
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1st Author's Name	ATSUSHI MATSUMURA
1st Author's Affiliation	National Center for Science Information Systems()
2nd Author's Name	ATSUHIRO TAKASU
2nd Author's Affiliation	National Center for Science Information Systems
3rd Author's Name	JUN ADACHI
3rd Author's Affiliation	National Center for Science Information Systems
Date	1999/7/22
Paper #	DE99-38
Volume (vol)	vol.99
Number (no)	202
Page	pp.pp.-
#Pages	6
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