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Paper Title:
Application of Bitmap Index to Information Retrieval

Authors:

  • Kengo Fujioka(NTT CyberSpace Laboratories, NTT Corporation)
  • Yukio Uematsu(NTT CyberSpace Laboratories, NTT Corporation)
  • Makoto Onizuka(NTT CyberSpace Laboratories, NTT Corporation)

Abstract:
We developed the HS-bitmap index for efficient information retrieval. The HS-bitmap index is a hierarchical document-term matrix: the original document-term matrix is called the leaf matrix and an upper matrix is the summary of its lower matrix. Our experiment results show the HS-bitmap index performs better than the inverted index with a minor space overhead.

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