Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Data Integration in Web Data Extraction System

  • Marcus Herzog
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1161

Synonyms

Personalized web; Web content mining; Web information integration and schema matching

Definition

Data integration in Web data extraction systems refers to the task of providing a uniform access to multiple Web data sources. The ultimate goal of Web data integration is similar to the objective of data integration in database systems. However, the main difference is that Web data sources (i.e., Websites) do not feature a structured data format which can be accessed and queried by means of a query language. In contrast, Web data extraction systemsneed to provide an additional layer to transform Web pages into (semi)-structured data sources. Typically, this layer provides an extraction mechanism that exploits the inherent document structure of HTML pages (i.e., the document object model), the content of the document (i.e., text), visual cues (i.e., formatting and layout), and the inter document structure (i.e., hyperlinks) to extract data instances from the given Web pages. Due...

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Recommended Reading

  1. 1.
    Baumgartner R, Flesca S, Gottlob G. Visual web information extraction with Lixto. In: Proceedings of the 27th International Conference on Very Large Data Bases; 2001. p. 119–28.Google Scholar
  2. 2.
    Berglund A, Boag S, Chamberlin D, Rernandez MF, Kay M, Robie J, Simeon J. editors. XML XPath language 2.0. W3C recommendation; 2007.Google Scholar
  3. 3.
    Bernstein PA, Melnik S, Petropoulos M, Quix C. Industrial-strength schema matching. ACM SIGMOD Rec. 2004;33(4):38–43.CrossRefGoogle Scholar
  4. 4.
    Bing L, Chen-Chuan-Chang K. Editorial: special issue on web content mining. ACM SIGKDD Explor Newsl. 2004;6(2):1–4.CrossRefGoogle Scholar
  5. 5.
    Boag S, Chamberlin D, Fernandez MF, Florescu D, Robie J, Simeon J. editors. XQuery 1.0. An XML query language. W3C recommendation; 2007.Google Scholar
  6. 6.
    Fodor O, Werthner E. Harmonise: a step toward an interoperable e-tourism marketplace. Intl J Electron Commer. 2005;9(2):11–39.CrossRefGoogle Scholar
  7. 7.
    Gravano L, Panagiotis GI, Koudas N, Srivastava D. Text joins in an RDBMS for web data integration. In: Proceedings of the 12th International World Wide Web Conference; 2003. p. 90–101.Google Scholar
  8. 8.
    Halevy A, Rajaraman A, Ordille J. Data integration: the teenage years. In: Proceedings of the 32nd International Conference on Very Large Data Bases; 2006. p. 9–18.Google Scholar
  9. 9.
    Harmonise Framework. Available at: http://sourcefo rge.net/projects/hmafra/
  10. 10.
    Herzog M, Gottlob G. InfoPipes: a flexible framework for m-commerce applications. In: Proceedings of the 2nd International Workshop on Technologies for E-Services; 2001. p. 175–86.CrossRefzbMATHGoogle Scholar
  11. 11.
    Kay M, editor. XSL transformations. Version 2.0. W3C recommendation; 2007.Google Scholar
  12. 12.
    Kirk T, Levy AY, Sagiv Y, Srivastava D. The information manifold. In: Proceedings of the Working Notes of the AAAI Spring Symposium on Information Gathering from Heterogeneous, Distributed Environments; 1995. p. 85–91.Google Scholar
  13. 13.
    Ludäscher B, Himmeröder R, Lausen G, May W, Schlepphorst C. Managing semistructured data with florid: a deductive object-oriented perspective. Inf Syst. 1998;23(9):589–613.CrossRefGoogle Scholar
  14. 14.
    May W, Lausen G. A uniform framework for integration of information from the web. Inf Syst. 2004;29(1):59–91.CrossRefGoogle Scholar
  15. 15.
    Myllymaki J. Effective web data extraction with standard XML technologies. Comput Netw. 2002;39(5):635–44.CrossRefGoogle Scholar
  16. 16.
    Rahm E, Bernstein PA. A survey of approaches to automatics schema matching. VLDB J. 2001;10(4):334–50.CrossRefzbMATHGoogle Scholar
  17. 17.
    Salton G, McGill MJ. Introduction to modern information retrieval. New York: McGraw-Hill; 1983.zbMATHGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Vienna University of TechnologyViennaAustria

Section editors and affiliations

  • Georg Gottlob
    • 1
  1. 1.Computing Lab.Oxford Univ.OxfordUK