The 19th Annual Conference of the Japanese Society for Artificial Intelligence, 2005

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      "!$#&%'() * + +, ) - +/.0 * 12- +34'( )5* + ) - +6 12- + *Extraction of winning or lost lawsuit information for legal precedents∗1Seiko Ito∗1∗2∗2Tohgoroh Matsui

Hayato Ohwada

Department of Industrial Administration, Graduate School of Science and Technology, Tokyo University of Science∗2Department of Industrial Administration, Faculty of Science and Technology, Tokyo University of ScienceThe trial of the United States works out with the case law. There is a tool of the retrieval of judicial precedents
such as Lexis and Findlaw as a means to look for this useful judicial precedent, and examining the judicial precedent
becomes possible by inputting the key word etc. The lawyers can easily find the case by inputting keywords withthe tools, but the biginners can hardly find them.
We focus attention on the victory or defeat of a comprehensible judicial precedent as the means to retrieve an
advantageous judicial precedent i for biginners.
In this paper, we propose the method consists of extraction module and analysis module.

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9Alton B.Hornback v. United States(No.04-5149)
11: XMLXML
court
judge
plaintiff
defendantcase namecase reason

2.3

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[Lexis] http://www.lexis.com/[The United States Court of Appeals for the Federal Circuit]
http://www.fedcir.gov/

1.
2.

[Bruninghaus 01] S. Bruninghaus and K. Ashley:Improving
the Representation Of Legal Case Texts With Information Extraction Methods.,ICAIL-01 pp.42-51. ACM
Press.

3.

1(Appellate Court)
patent12[Bruninghaus 97] S. Bruninghaus and K. Ashley:Learning
to Classify Case Opinions under Abstract Fact,ICAIL97,pp. 123-131. Association for Computing Machinery:
New York, NY.

12