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Managing XML and Semistructured Data

Managing XML and Semistructured Data. Lecture 1: Preliminaries and Overview. Prof. Dan Suciu. Spring 2001. In this lecture. Goals of the course Prerequisites Resources textbooks research papers Overview of the course. Goals of the Course. Purpose:

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Managing XML and Semistructured Data

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  1. Managing XML and Semistructured Data Lecture 1: Preliminaries and Overview Prof. Dan Suciu Spring 2001 Managing XML and Semistructured Data

  2. In this lecture • Goals of the course • Prerequisites • Resources • textbooks • research papers • Overview of the course Managing XML and Semistructured Data

  3. Goals of the Course Purpose: • Foundations of semistructured data • Issues in semistructured data management • Glimpse at current XML standards and technology Managing XML and Semistructured Data

  4. Prerequisites • A graduate course in database systems • Logic • Programming languages • Complexity theory • Algorithms and data structures Managing XML and Semistructured Data

  5. Textbooks • Data on the Web: from Relations, to Semistructured Data and XML, Abiteboul, Buneman, Suciu • For foundations • W3C homepage, www.w3.org • For current standards • Professional XML Databases,Kevin Williams • For current XML technologies Managing XML and Semistructured Data

  6. Other Useful Texts • A first course in database systems (2 vols) Ullman, Widom and Garcia-Molina • Data and Knowledge based Systems (2 vols) Ullman • Foundations of data bases Abiteboul, Hull Vianu • Proceedings of SIGMOD, VLDB, PODS conferences. Managing XML and Semistructured Data

  7. Papers: Data Models • XML, Java, and the future of the Web by Jon Bosak, Sun Microsystems. • W3C XML Query Data Model Mary Fernandez, Jonathan Robie. • Adding structure to semistructured data by Buneman, Davidson, Fernandez, Suciu, in ICDT 97 • Object Exchange Across Heterogeneous Information Sources Y. Papakonstantinou and H. Garcia-Molina and J. Widom, Data Engineering 95 Managing XML and Semistructured Data

  8. Papers: Query Languages • A formal semantics of patterns in XSLT by Phil Wadler. • XQuery: A Query Language for XML Chamberlin, Florescu, et al. • XML-QL: A Query Language for XML by Deutsch, Fernandez, Florescu, Levy, Suciu, in WWW8. • Catching the boat with Strudel VLDBJ 2001. • UnQL: A Query Language and Algebra for Semistructured Data Based on Structural Recursion Buneman, Fernandez, Suciu.VLDBJ 2000 • The Lorel Query Language for Semistructured Data  by Abiteboul, Quass, McHugh, Widom, Wiener, in International Journal on Digital Libraries, 1997. Managing XML and Semistructured Data

  9. Papers: Schemas • MSL: A Model for W3C XML Schema by Brown, Fuchs, Robie, Wadler, in WWW10, 2001. • Keys for XML by Buneman, Davidson, Fan, Hara, Tan, in WWW10, 2001. • Subsumption for XML Types by Kuper and Simeon, ICDT'2001. • Extracting Schema from Semistructured Data Nestorov, Abiteboul, Motwani. SIGMOD 98 Managing XML and Semistructured Data

  10. Papers: Query Analysis, Typechecking • Optimizing Regular Path Expressions Using Graph Schemas Fernandez, Suciu, ICDE'98. • XDuce: A typed XML processing language by Hosoya and Pierce • Regular Expresssion Pattern Matching for XML by Hosoya and Pierce (in POPL 2001) • Typechecking for XML TransformersMilo, Vianu, Suciu. Managing XML and Semistructured Data

  11. Papers: Indexing • Index Structures for Path Expressions by Milo and Suciu, in ICDT'99. Managing XML and Semistructured Data

  12. Papers: Publishing • Efficiently Publishing Relational Data as XML Ducments  by Shanmugasundaram, Shekita, Barr, Carey, Lindsay, Pirahesh, Reinwald in VLDB'2000 • SilkRoute: Trading between relations and XML by Fernandez, Suciu, Tan R, in WWW9, 2000 • Efficient Evaluation of XML Middle-ware Queries in SIGMOD'2001 Managing XML and Semistructured Data

  13. Papers: Compression • XMILL: An Efficient Compressor for XML Data by Liefke and Suciu, in SIGMOD'2001 Managing XML and Semistructured Data

  14. Overview • Semistructured Data • Model • Syntax • Comparison with relational data Managing XML and Semistructured Data

  15. Overview • XML • Motivation • Syntax: • Basic stuff: elements, attributes, content • Esoteric stuff: PIs, entities, CDATA, comments • DTDs • Data model (XQuery) • Miscellaneous: Name spaces, XPointer, XLink Managing XML and Semistructured Data

  16. Overview • Query Languages • Lorel extends OQL • UnQL structural recursion, patterns • StruQL Skolem Functions • XML-QL everything for XML • Quilt/Xquery the standard • XSL the standard • XDuce a general-purpose language Managing XML and Semistructured Data

  17. Overview • Schemas • Theory: lower bound, upper bound • XML-Schema • “XML-Schema are regular tree languages” • Constraints (keys for XML) Managing XML and Semistructured Data

  18. Overview • Query analysis • Query pruning • Query containment Managing XML and Semistructured Data

  19. Overview • XML Publishing from Relational Databases • Virtual XML publishing: SilkRoute, Microsoft’s XDR • Materialized XML publishing: Experanto, SilkRoute, Microsoft’s “for XML” Managing XML and Semistructured Data

  20. Overview • Indexes • Indexes for ss data: data guides, T-indexes • Indexes for XML: we are still waiting for them... Managing XML and Semistructured Data

  21. Overview • Miscellaneous • XML compression (Xmill) Managing XML and Semistructured Data

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