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Data on the Web: From Relations to Semistructured Data and XML Export

(12 October 1999)

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2000 book query_language

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<I>Data on the Web: From Relations to Semistructured Data and XML</I> is an examination of XML as a universal data transfer language and the theory behind the merging of the document-centric Web with a data-driven infrastructure. The book is intended as a textbook analysis of the issues, as well as background material for tool developers and others interested in the serious architectural details.<p> Aimed at readers already familiar with database concepts, the book includes little introductory material. It quickly lays out the concepts of self-describing semi-structured data and how XML fits into this approach to data representation. The discussion deals with XML as a data transfer mechanism and not a presentation language. While there is a quick explanation of DTDs, Xlink, and XPointer, readers should be fairly familiar with XML before approaching this advanced title.<p> The meat of the book revolves around query languages for XML. The authors present XML-QL and XSL in depth as examples. Then they move into much more advanced concepts such as schema formalisms, path constraints, and storage architectures. The book wraps up with a look at Lore and Strudel--two real-world systems that work with semi-structured data. Because of its intensive study of database and query theory, this textbook isn't for the ordinary Web developer. If data architectures are your expertise, however, <I>Data on the Web</I> may open new design doors. <I>--Stephen W. Plain</I><p> <B>Topics covered</B>: Object database models, basic XML syntax, UnQL, XML-QL, XSL, StruQL, schema formalisms, extracting schemas from queries, semistructured data servers, Lore, Strudel, and XML-based database products. <P>The Web is causing a revolution in how we represent, retrieve, and process information Its growth has given us a universally accessible databasebut in the form of a largely unorganized collection of documents. This is changing, thanks to the simultaneous emergence of new ways of representing data: from within the Web community, XML; and from within the database community, semistructured data. The convergence of these two approaches has rendered them nearly identical. Now, there is a concerted effort to develop effective techniques for retrieving and processing both kinds of data.<br><B><br></B><I><P>Data on the Web</I> is the only comprehensive, up-to-date examination of these rapidly evolving retrieval and processing strategies, which are of critical importance for almost all Web- and data-intensive enterprises. This book offers detailed solutions to a wide range of practical problems while equipping you with a keen understanding of the fundamental issuesincluding data models, query languages, and schemasinvolved in their design, implementation, and optimization. You'll find it to be compelling reading, whether your interest is that of a practitioner involved in a database-driven Web enterprise or a researcher in computer science or related field.<br><br>* Provides an in-depth look at XML and other technologies for publishing structured documents on the Web.<br>* Examines recently developed methods for querying and updating structured Web documents and semistructured data, including XML-QL and XSL.<br>* Looks deeper into the convergence of Web and database approaches to semistructured data presentation and querying.<br>* Details practical examples of how these techniques are already being appliedand how they will be used in the near future.<br>* Teaches sound techniques for writing queries over Web data, describing loose schemas over partially structured data, and implementing and optimizing queries on semistructured data.


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