Errata for “Faster index for property matching”

  • Authors:

  • M. T. Juan;J. J. Liu;Y. L. Wang

  • Affiliations:

  • Department of Information Management, National Taiwan University of Science and Technology, Taipei, Taiwan;Department of Information Management, Shih Hsin University, Taipei, Taiwan;Department of Information Management, National Taiwan University of Science and Technology, Taipei, Taiwan

  • Venue:
  • Information Processing Letters
  • Year:
  • 2009

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Abstract

In [C.S. Iliopoulos, M.S. Rahman, Faster index for property matching, Information Processing Letters 105 (2008) 218-223], Iliopoulos and Rahman proposed a data structure called IDS-PIP for solving the property indexing pattern matching problem. IDS-PIP can be constructed in O(n) time, where n is the length of the text. Then, based on ID-PIP, each query takes O(mlog|@S|+K) time, where m is the length the pattern, @S is the alphabet, and K is the output size. They assume that all intervals in property @p are disjoint. If the intervals in property @p are not disjoint, then they create an equivalent set of disjoint intervals @p^' to replace @p. However, property @p^' is not equivalent to property @p at all. In this erratum, we propose a way for finding correct property @p^' and modify IDS-PIP slightly.