Towards practically feasible answering of regular path queries in LAV data integration
Regular path queries (RPQ’s) are given by means of regular expressions and ask for matching patterns on labeled graphs. RPQ’s have recently received great attention in the context of semistructured data, which are data whose structure is irregular, partially known, or subject to frequent changes....
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ndltd-uvic.ca-oai-dspace.library.uvic.ca-1828-1292015-01-29T16:50:22Z Towards practically feasible answering of regular path queries in LAV data integration Tamashiro, Manuel Thomo, Alex Srinivasan, Venkatesh Regular Path Query LAV Database UVic Subject Index::Sciences and Engineering::Applied Sciences::Computer science Regular path queries (RPQ’s) are given by means of regular expressions and ask for matching patterns on labeled graphs. RPQ’s have recently received great attention in the context of semistructured data, which are data whose structure is irregular, partially known, or subject to frequent changes. One of the most important problems in databases today is the integration of semistructured data from multiple sources modeled as views. In this setting, the database is not available, and given a user query, the system has to answer based solely on the information provided by the views. The problem is computationally hard, and the well-known algorithm for solving it runs in 2EXPTIME. In this paper, we provide practical evidence that this algorithm performs poorly on the average as well. Then, we propose automata- theoretic techniques which make the view-based answering of RPQ’s more feasible in practice. 2007-06-27T17:00:31Z 2007-06-27T17:00:31Z 2007 2007-06-27T17:00:31Z Thesis http://hdl.handle.net/1828/129 English en Available to the World Wide Web |
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English en |
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Regular Path Query LAV Database UVic Subject Index::Sciences and Engineering::Applied Sciences::Computer science |
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Regular Path Query LAV Database UVic Subject Index::Sciences and Engineering::Applied Sciences::Computer science Tamashiro, Manuel Towards practically feasible answering of regular path queries in LAV data integration |
description |
Regular path queries (RPQ’s) are given by means of regular expressions and
ask for matching patterns on labeled graphs. RPQ’s have recently received great
attention in the context of semistructured data, which are data whose structure is
irregular, partially known, or subject to frequent changes. One of the most important
problems in databases today is the integration of semistructured data from multiple
sources modeled as views. In this setting, the database is not available, and given
a user query, the system has to answer based solely on the information provided
by the views. The problem is computationally hard, and the well-known algorithm
for solving it runs in 2EXPTIME. In this paper, we provide practical evidence that
this algorithm performs poorly on the average as well. Then, we propose automata-
theoretic techniques which make the view-based answering of RPQ’s more feasible in
practice. |
author2 |
Thomo, Alex |
author_facet |
Thomo, Alex Tamashiro, Manuel |
author |
Tamashiro, Manuel |
author_sort |
Tamashiro, Manuel |
title |
Towards practically feasible answering of regular path queries in LAV data integration |
title_short |
Towards practically feasible answering of regular path queries in LAV data integration |
title_full |
Towards practically feasible answering of regular path queries in LAV data integration |
title_fullStr |
Towards practically feasible answering of regular path queries in LAV data integration |
title_full_unstemmed |
Towards practically feasible answering of regular path queries in LAV data integration |
title_sort |
towards practically feasible answering of regular path queries in lav data integration |
publishDate |
2007 |
url |
http://hdl.handle.net/1828/129 |
work_keys_str_mv |
AT tamashiromanuel towardspracticallyfeasibleansweringofregularpathqueriesinlavdataintegration |
_version_ |
1716728860337242112 |