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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Bibliographic Details
Main Author: Tamashiro, Manuel
Other Authors: Thomo, Alex
Language:English
en
Published: 2007
Subjects:
LAV
Online Access:http://hdl.handle.net/1828/129
id ndltd-uvic.ca-oai-dspace.library.uvic.ca-1828-129
record_format oai_dc
spelling 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
collection NDLTD
language English
en
sources NDLTD
topic Regular Path
Query
LAV
Database
UVic Subject Index::Sciences and Engineering::Applied Sciences::Computer science
spellingShingle 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
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