General Strategy for Querying Web Sources in a Data Federation Environment

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Author(s): Aykut Firat (Northeastern University, USA), Lynn Wu (Massachusetts Institute of Technology, USA)and Stuart Madnick (Massachusetts Institute of Technology, USA)
Copyright: 2010
Pages: 18
Source title: Web Technologies: Concepts, Methodologies, Tools, and Applications
Source Author(s)/Editor(s): Arthur Tatnall (Victoria University, Australia)
DOI: 10.4018/978-1-60566-982-3.ch134

Keywords: Computer Science & IT / Information Science Reference / Web Technologies / Web Technologies & Engineering

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Abstract

Modern database management systems are supporting the inclusion and querying of nonrelational sources within a data federation environment via wrappers. Wrapper development for Web sources, however, is a convolution of code with extraction and query planning knowledge and becomes a daunting task. We use IBM DB2 federation engine to demonstrate the challenges of incorporating Web sources into a data federation. We, then, present a practical and general strategy for the inclusion and querying of Web sources without requiring any changes in the underlying data federation technology. This strategy separates the code and knowledge in wrapper development by introducing a general-purpose capabilities-aware mini query-planner and a data extraction engine. As a result, Web sources can be included in a data federation system faster, and maintained easier.

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