Titlebook: Database and XML Technologies; 4th International XM Sihem Amer-Yahia,Zohra Bellahsène,Jeffrey Xu Yu Conference proceedings 2006 Springer-Ve

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On the Expressive Power of XQuery-Based Update Languagesive expressive power of the different constructs, and we establish the relationships between these subsets in terms of queries and updates that can be expressed. Finally, we discuss the relationships between these subsets and existing XQuery-based update languages.

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Consistency of Temporal XML Documentslidation of a document when many temporal inconsistencies of different kinds are present. We study the conditions that allow to treat each inconsistency isolated from the rest, and give the corresponding proofs. These properties are intended to be the basis of efficient algorithms for checking temporal consistency in XML.

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Conference proceedings 2006ium in 2003, XSym has continued to provide a forum for academics, practitioners, users and vendors to discuss the use of and synergy between advanced XML technologies. XSym 2006 received 32 full paper submissions. Each submitted paper underwent a rigorous review by independent referees. These procee

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Index vs. Navigation in XPath Evaluation relational databases. But is it still valid for XML queries? In this paper we develop similar rules of thumb for XML queries by experimentally comparing different execution strategies, e.g. using navigation or indices. These rules can be used immediately for heuristic optimization of XML queries, a

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Consistency of Temporal XML Documents as of any given time, in XML documents. After presenting an abstract model for temporal XML, we discuss the problem of the validation of the temporal constraints imposed by this model. We first review the problem of checking and fixing isolated temporal inconsistencies. Then, we move on to study va

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