Database and XMLTechnologies: 5th International XML Database by Leonid Libkin (auth.), Denilson Barbosa, Angela Bonifati,

By Leonid Libkin (auth.), Denilson Barbosa, Angela Bonifati, Zohra Bellahsène, Ela Hunt, Rainer Unland (eds.)

Since its first version in 2003, the XML Database Symposium sequence (XSym) has been a discussion board for lecturers, practitioners, clients and owners to debate using and synergy among databases and XML. the former symposia have supplied possibilities for well timed discussions on a huge diversity of themes concerning the idea and perform of XML facts administration and its purposes. XSym 2007 maintains this practice with a software such as 3 study classes, keynote talks and a panel. We bought 28 complete paper submissions, out of which eight have been permitted for ebook in those court cases. each one submitted paper underwent a rigorous and cautious evaluate by means of not less than four autonomous referees. The contributions in those complaints are an excellent pattern of some of the best present learn in XPath and XQuery processing, XML Updates, Temporal XML and Constraints. This quantity additionally comprises invited brief papers by means of the XSym 2007 keynote audio system: Leonid Libkin (University of Edinburgh, united kingdom) contributed a radical dialogue of Normalization thought for XML, whereas Erhard Rahm (University of Leipzig, Germany) contributed an enticing evaluate of the paintings on Dynamic Fusion of internet information conducted at his - seek crew. This 12 months, XSym will best its application off via an exhilarating panel with the identify “The new release Y of XML Schema Matching”. It used to be proposed and is prepared by way of Avigdor Gal from Technion – Israel Institute of Techn- ogy.

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Database and XMLTechnologies: 5th International XML Database Symposium, XSym 2007, Vienna, Austria, September 23-24, 2007. Proceedings

Given that its first version in 2003, the XML Database Symposium sequence (XSym) has been a discussion board for lecturers, practitioners, clients and owners to debate using and synergy among databases and XML. the former symposia have supplied possibilities for well timed discussions on a huge diversity of subject matters referring to the speculation and perform of XML info administration and its functions.

Extra info for Database and XMLTechnologies: 5th International XML Database Symposium, XSym 2007, Vienna, Austria, September 23-24, 2007. Proceedings

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In: ICDT, pp. 277–295 (1999) 18. : Representative objects: Concise representations of semistructured, hierarchial data. In: ICDE, pp. 79–90 (1997) 19. : Three partition refinement algorithms. SIAM Journal on Computing 16(6), 973–989 (1987) 20. : XCLUSTER synopses for structured XML content. In: ICDE (2006) 21. : XSKETCH synopses for XML data graphs. ACM Transactions on Database Systems (TODS) 31(3), 1014–1063 (2006) 22. : Approximate XML query answers. In: SIGMOD, pp. 263–274 (2004) 23. : D(k)-index: An adaptive structural summary for graph-structured data.

Fewer query blocks mean a larger search space for the plan generator and lead to a generally higher quality of the execution plans. The goal of this paper is to provide a toolkit for developers of XQuery evaluators to transform XQuery expressions into expressions with as few query blocks as possible. Our toolkit takes the form of rewrite rules merging the inner and outer FLWOR expressions into single FLWORs. We focus on previously unpublished rewrite rules and on inner FLWORs occurring in the for, let, and return clauses in the outer FLWOR.

Consens and F. Rizzolo A few adaptive summaries, like APEX [5] and D(k)-index [23], use dynamic query workloads to determine the subset of incoming paths to be summarized. APEX uses an ad-hoc construction mechanism to summarize paths that appear frequently in a query workload. The workload APEX considers are expressions containing a number of child axis composition that may be preceded by a descendant axis, without any predicate. e. SDs defined by the p∗ AxPRE) and does not provide an explicit description of the extents, whereas DescribeX supports arbitrary AxPRE’s.

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