Dialog system for open-ended conversation using web documents

Masahiro Shibata, Tomomi Nishiguchi, Yoichi Tomiura

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


We have developed a new type of open-ended dialog system that generates proper responses to users' utterances using the abundant documents available on the World Wide Web as sources. Existing knowledge-based dialog systems rovide meaningful information to users, but they are unsuitable for open-ended input. The system Eliza, while it can handle open-ended input, gives no meaningful information. Our system lies between the above two dialog systems; it can converse on various topics and gives meaningful information related to the user's utterances. The system selects an appropriate sentence as a response from documents gathered through the Web on the basis of surface cohesion and shallow semantic coherence. We developed a trial system to converse about movies and experimentally found that the proposed method generated appropriate responses at a rate of 66%.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalInformatica (Ljubljana)
Issue number3
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Software
  • Theoretical Computer Science
  • Computer Science Applications
  • Artificial Intelligence


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