License: Creative Commons Attribution 3.0 Unported license (CC BY 3.0)
When quoting this document, please refer to the following
DOI: 10.4230/LIPIcs.STACS.2014.506
URN: urn:nbn:de:0030-drops-44838
URL: http://dagstuhl.sunsite.rwth-aachen.de/volltexte/2014/4483/
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Lewenstein, Moshe ; Nekrich, Yakov ; Vitter, Jeffrey Scott

Space-Efficient String Indexing for Wildcard Pattern Matching

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Abstract

In this paper we describe compressed indexes that support pattern matching queries for strings with wildcards. For a constant size alphabet our data structure uses O(n.log^e(n)) bits for any e>0 and reports all occ occurrences of a wildcard string in O(m+s^g.M(n)+occ) time, where M(n)=o(log(log(log(n)))), s is the alphabet size, m is the number of alphabet symbols and g is the number of wildcard symbols in the query string. We also present an O(n)-bit index with O((m+s^g+occ).log^e(n)) query time and an O(n{log(log(n))}^2)-bit index with O((m+s^g+occ).log(log(n))) query time. These are the first non-trivial data structures for this problem that need o(n.log(n)) bits of space.

BibTeX - Entry

@InProceedings{lewenstein_et_al:LIPIcs:2014:4483,
  author =	{Moshe Lewenstein and Yakov Nekrich and Jeffrey Scott Vitter},
  title =	{{Space-Efficient String Indexing for Wildcard Pattern Matching}},
  booktitle =	{31st International Symposium on Theoretical Aspects of Computer Science (STACS 2014)},
  pages =	{506--517},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-939897-65-1},
  ISSN =	{1868-8969},
  year =	{2014},
  volume =	{25},
  editor =	{Ernst W. Mayr and Natacha Portier},
  publisher =	{Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{http://drops.dagstuhl.de/opus/volltexte/2014/4483},
  URN =		{urn:nbn:de:0030-drops-44838},
  doi =		{10.4230/LIPIcs.STACS.2014.506},
  annote =	{Keywords: compressed data structures, compressed indexes, pattern matching}
}

Keywords: compressed data structures, compressed indexes, pattern matching
Collection: 31st International Symposium on Theoretical Aspects of Computer Science (STACS 2014)
Issue Date: 2014
Date of publication: 05.03.2014

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