{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,3]],"date-time":"2026-10-03T23:18:48Z","timestamp":1791069528303,"version":"4.1.0"},"reference-count":23,"publisher":"Association for Computing Machinery (ACM)","issue":"1","license":[{"start":{"date-parts":[[2011,3,1]],"date-time":"2011-03-01T00:00:00Z","timestamp":1298937600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"funder":[{"DOI":"10.13039\/100000145","name":"Division of Information and Intelligent Systems","doi-asserted-by":"publisher","award":["IIS 0910820IIS 0705589"],"award-info":[{"award-number":["IIS 0910820IIS 0705589"]}],"id":[{"id":"10.13039\/100000145","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["ACM Trans. Database Syst."],"published-print":{"date-parts":[[2011,3]]},"abstract":"<jats:p>We study the problem of querying XML data sources that accept only a limited set of queries, such as sources accessible by Web services which can implement very large (potentially infinite) families of XPath queries. To compactly specify such families of queries we adopt the Query Set Specifications, a formalism close to context-free grammars.<\/jats:p>\n          <jats:p>\n            We say that query\n            <jats:italic>Q<\/jats:italic>\n            is\n            <jats:italic>expressible<\/jats:italic>\n            by the specification P if it is equivalent to some expansion of P.\n            <jats:italic>Q<\/jats:italic>\n            is\n            <jats:italic>supported<\/jats:italic>\n            by P if it has an equivalent rewriting using some finite set of P's expansions. We study the complexity of expressibility and support and identify large classes of XPath queries for which there are efficient (PTIME) algorithms. Our study considers both the case in which the XML nodes in the results of the queries lose their original identity and the one in which the source exposes persistent node ids.\n          <\/jats:p>","DOI":"10.1145\/1929934.1929939","type":"journal-article","created":{"date-parts":[[2011,3,17]],"date-time":"2011-03-17T12:40:16Z","timestamp":1300365616000},"page":"1-42","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Querying XML data sources that export very large sets of views"],"prefix":"10.1145","volume":"36","author":[{"given":"Bogdan","family":"Cautis","sequence":"first","affiliation":[{"name":"T\u00e9l\u00e9com ParisTech, CNRS LTCI, Paris, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alin","family":"Deutsch","sequence":"additional","affiliation":[{"name":"University of California, San Diego, CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nicola","family":"Onose","sequence":"additional","affiliation":[{"name":"University of California, Irvine, CA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vasilis","family":"Vassalos","sequence":"additional","affiliation":[{"name":"Athens University of Economics and Business, Athens GR, Greece"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2011,3,18]]},"reference":[{"key":"e_1_2_2_1_1","unstructured":"Abiteboul S. Hull R. and Vianu V. 1995. Foundations of Databases. Addison-Wesley.   Abiteboul S. Hull R. and Vianu V. 1995. Foundations of Databases. Addison-Wesley."},{"key":"e_1_2_2_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00778-002-0076-7"},{"key":"e_1_2_2_3_1","volume-title":"Proceedings of the International Conference on Very Large Databeses. 87--98","author":"Arion A.","unstructured":"Arion , A. , Benzaken , V. , Manolescu , I. , and Papakonstantinou , Y . 2007. Structured materialized views for XML queries . In Proceedings of the International Conference on Very Large Databeses. 87--98 . Arion, A., Benzaken, V., Manolescu, I., and Papakonstantinou, Y. 2007. Structured materialized views for XML queries. In Proceedings of the International Conference on Very Large Databeses. 87--98."},{"key":"e_1_2_2_4_1","volume-title":"Proceedings of the International Conference on Very Large Databeses. 60--71","author":"Balmin A.","unstructured":"Balmin , A. , \u00d6zcan , F. , Beyer , K. S. , Cochrane , R. , and Pirahesh , H . 2004. A framework for using materialized XPath views in XML query processing . In Proceedings of the International Conference on Very Large Databeses. 60--71 . Balmin, A., \u00d6zcan, F., Beyer, K. S., Cochrane, R., and Pirahesh, H. 2004. A framework for using materialized XPath views in XML query processing. In Proceedings of the International Conference on Very Large Databeses. 60--71."},{"key":"e_1_2_2_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.tcs.2004.10.030"},{"key":"e_1_2_2_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcss.2009.02.001"},{"key":"e_1_2_2_7_1","volume-title":"Proceedings of the International Workshop on Web and Databases.","author":"Cautis B.","unstructured":"Cautis , B. , Deutsch , A. , and Onose , N . 2008. XPath rewriting using multiple views: Achieving completeness and efficiency . In Proceedings of the International Workshop on Web and Databases. Cautis, B., Deutsch, A., and Onose, N. 2008. XPath rewriting using multiple views: Achieving completeness and efficiency. In Proceedings of the International Workshop on Web and Databases."},{"key":"e_1_2_2_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/1514894.1514905"},{"key":"e_1_2_2_9_1","doi-asserted-by":"publisher","DOI":"10.14778\/1687627.1687662"},{"key":"e_1_2_2_10_1","unstructured":"Cormen T. H. Leiserson C. E. Rivest R. L. and Stein C. 2001. Introduction to Algorithms 2nd Ed. The MIT Press.   Cormen T. H. Leiserson C. E. Rivest R. L. and Stein C. 2001. Introduction to Algorithms 2nd Ed. The MIT Press."},{"key":"e_1_2_2_11_1","doi-asserted-by":"publisher","DOI":"10.1145\/1007568.1007634"},{"key":"e_1_2_2_12_1","volume-title":"Proceedings of the International Conference on Data Engineering. 666--675","author":"Fan W.","unstructured":"Fan , W. , Geerts , F. , Jia , X. , and Kementsietsidis , A . 2007. Rewriting regular XPath queries on XML views . In Proceedings of the International Conference on Data Engineering. 666--675 . Fan, W., Geerts, F., Jia, X., and Kementsietsidis, A. 2007. Rewriting regular XPath queries on XML views. In Proceedings of the International Conference on Data Engineering. 666--675."},{"key":"e_1_2_2_13_1","unstructured":"Garey M. R. and Johnson D. S. 1979. Computers and Intractability: A Guide to the Theory of NP-Completeness. W. H. Freeman.   Garey M. R. and Johnson D. S. 1979. Computers and Intractability: A Guide to the Theory of NP-Completeness. W. H. Freeman."},{"key":"e_1_2_2_14_1","unstructured":"Hopcroft J. E. and Ullman J. D. 1979. Introduction to Automata Theory Languages and Computation. Addison-Wesley.   Hopcroft J. E. and Ullman J. D. 1979. Introduction to Automata Theory Languages and Computation. Addison-Wesley."},{"key":"e_1_2_2_15_1","doi-asserted-by":"publisher","DOI":"10.1006\/jcss.1998.1599"},{"key":"e_1_2_2_16_1","volume-title":"Proceedings of the International Conference on Very Large Databeses. 469--480","author":"Mandhani B.","unstructured":"Mandhani , B. and Suciu , D . 2005. Query caching and view selection for xml databases . In Proceedings of the International Conference on Very Large Databeses. 469--480 . Mandhani, B. and Suciu, D. 2005. Query caching and view selection for xml databases. In Proceedings of the International Conference on Very Large Databeses. 469--480."},{"key":"e_1_2_2_17_1","doi-asserted-by":"publisher","DOI":"10.1145\/962446.962448"},{"key":"e_1_2_2_18_1","doi-asserted-by":"publisher","DOI":"10.5555\/998688.1007114"},{"key":"e_1_2_2_19_1","volume-title":"Proceedings of the International Conference on Deductive and Object-Oriented Databases. 161--186","author":"Papakonstantinou Y.","unstructured":"Papakonstantinou , Y. , Gupta , A. , Garcia-Molina , H. , and Ullman , J. D . 1995. A query translation scheme for rapid implementation of wrappers . In Proceedings of the International Conference on Deductive and Object-Oriented Databases. 161--186 . Papakonstantinou, Y., Gupta, A., Garcia-Molina, H., and Ullman, J. D. 1995. A query translation scheme for rapid implementation of wrappers. In Proceedings of the International Conference on Deductive and Object-Oriented Databases. 161--186."},{"key":"e_1_2_2_20_1","volume-title":"Proceedings of the International Workshop on Web and Databases. 99--104","author":"Petropoulos M.","unstructured":"Petropoulos , M. , Deutsch , A. , and Papakonstantinou , Y . 2003. The Query Set Specification Language (QSSL) . In Proceedings of the International Workshop on Web and Databases. 99--104 . Petropoulos, M., Deutsch, A., and Papakonstantinou, Y. 2003. The Query Set Specification Language (QSSL). In Proceedings of the International Workshop on Web and Databases. 99--104."},{"key":"e_1_2_2_21_1","doi-asserted-by":"publisher","DOI":"10.1109\/ICDE.2008.4497496"},{"key":"e_1_2_2_22_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0743-1066(99)00026-6"},{"key":"e_1_2_2_23_1","volume-title":"Proceedings of the International Conference on Very Large Databeses. 121--132","author":"Xu W.","year":"2005","unstructured":"Xu , W. and \u00d6zsoyoglu , Z. M. 2005 . Rewriting XPath queries using materialized views . In Proceedings of the International Conference on Very Large Databeses. 121--132 . Xu, W. and \u00d6zsoyoglu, Z. M. 2005. Rewriting XPath queries using materialized views. In Proceedings of the International Conference on Very Large Databeses. 121--132."}],"container-title":["ACM Transactions on Database Systems"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1929934.1929939","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1929934.1929939","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T20:26:32Z","timestamp":1750278392000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1929934.1929939"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,3]]},"references-count":23,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2011,3]]}},"alternative-id":["10.1145\/1929934.1929939"],"URL":"https:\/\/doi.org\/10.1145\/1929934.1929939","relation":{},"ISSN":["0362-5915","1557-4644"],"issn-type":[{"value":"0362-5915","type":"print"},{"value":"1557-4644","type":"electronic"}],"subject":[],"published":{"date-parts":[[2011,3]]},"assertion":[{"value":"2010-01-01","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2010-06-01","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2011-03-18","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}