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XTRACT: a system for extracting document type descriptors from XML documents

Garofalakis Minos, Gionis Aristides, Rastogi Rajeev, Seshadri, Sridhar, Shim Kyuseok

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Extent12 pagesen
TitleXTRACT: a system for extracting document type descriptors from XML documentsen
CreatorGarofalakis Minosen
CreatorΓαροφαλακης Μινωςel
CreatorGionis Aristidesen
CreatorRastogi Rajeeven
CreatorSeshadri, Sridharen
CreatorShim Kyuseoken
PublisherAssociation for Computing Machineryen
Content SummaryXML is rapidly emerging as the new standard for data representation and exchange on the Web. An XML document can be accompanied by a Document Type Descriptor (DTD) which plays the role of a schema for an XML data collection. DTDs contain valuable information on the structure of documents and thus have a crucial role in the efficient storage of XML data, as well as the effective formulation and optimization of XML queries. In this paper, we propose XTRACT, a novel system for inferring a DTD schema for a database of XML documents. Since the DTD syntax incorporates the full expressive power of regular expressions, naive approaches typically fail to produce concise and intuitive DTDs. Instead, the XTRACT inference algorithms employ a sequence of sophisticated steps that involve: (1) finding patterns in the input sequences and replacing them with regular expressions to generate “general” candidate DTDs, (2) factoring candidate DTDs using adaptations of algorithms from the logic optimization literature, and (3) applying the Minimum Description Length (MDL) principle to find the best DTD among the candidates. The results of our experiments with real-life and synthetic DTDs demonstrate the effectiveness of XTRACT's approach in inferring concise and semantically meaningful DTD schemas for XML databases.en
Type of ItemΔημοσίευση σε Συνέδριοel
Type of ItemConference Publicationen
Date of Item2015-12-01-
Date of Publication2000-
Bibliographic CitationM. Garofalakis, A. Gionis, R. Rastogi, S. Seshadri and K. Shim, "XTRACT: a system for extracting document type descriptors from XML documents", in SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data, June 2000, pp. 165-176. doi: 10.1145/342009.335409en