Advances in Web and Network Technologies, and Information by Tianxiao Liu, Tuyêt Trâm Dang Ngoc, Dominique Laurent

By Tianxiao Liu, Tuyêt Trâm Dang Ngoc, Dominique Laurent (auth.), Kevin Chen-Chuan Chang, Wei Wang, Lei Chen, Clarence A. Ellis, Ching-Hsien Hsu, Ah Chung Tsoi, Haixun Wang (eds.)

This publication constitutes the refereed mixed lawsuits of 4 foreign workshops held at the side of the joint ninth Asia-Pacific net convention, APWeb 2007, and the eighth foreign convention on Web-Age details administration, WAIM 2007, held in Huang Shan, China in June 2007.

The 50 revised complete papers and 25 revised brief papers offered including the summary of 1 keynote speak have been conscientiously reviewed and chosen from a complete of 266 submissions. The papers of the 4 workshops are very particular and give a contribution to enlarging the spectrum of the extra normal themes taken care of within the APWeb 2007 and WAIM 2007 major meetings. issues addressed via the workshops are: Database administration and alertness over Networks (DBMAN 2007), rising traits of net applied sciences and functions (WebETrends 2007), method conscious info platforms (PAIS 2007), and alertness and safeguard carrier in net and Pervasive Environments (ASWAN 2007).

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By Tianxiao Liu, Tuyêt Trâm Dang Ngoc, Dominique Laurent (auth.), Kevin Chen-Chuan Chang, Wei Wang, Lei Chen, Clarence A. Ellis, Ching-Hsien Hsu, Ah Chung Tsoi, Haixun Wang (eds.)

This publication constitutes the refereed mixed lawsuits of 4 foreign workshops held at the side of the joint ninth Asia-Pacific net convention, APWeb 2007, and the eighth foreign convention on Web-Age details administration, WAIM 2007, held in Huang Shan, China in June 2007.

The 50 revised complete papers and 25 revised brief papers offered including the summary of 1 keynote speak have been conscientiously reviewed and chosen from a complete of 266 submissions. The papers of the 4 workshops are very particular and give a contribution to enlarging the spectrum of the extra normal themes taken care of within the APWeb 2007 and WAIM 2007 major meetings. issues addressed via the workshops are: Database administration and alertness over Networks (DBMAN 2007), rising traits of net applied sciences and functions (WebETrends 2007), method conscious info platforms (PAIS 2007), and alertness and safeguard carrier in net and Pervasive Environments (ASWAN 2007).

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Read or Download Advances in Web and Network Technologies, and Information Management: APWeb/WAIM 2007 International Workshops: DBMAN 2007, WebETrends 2007, PAIS 2007 and ASWAN 2007, Huang Shan, China, June 16-18, 2007. Proceedings PDF

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Extra info for Advances in Web and Network Technologies, and Information Management: APWeb/WAIM 2007 International Workshops: DBMAN 2007, WebETrends 2007, PAIS 2007 and ASWAN 2007, Huang Shan, China, June 16-18, 2007. Proceedings

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For the sake of simplicity, we assume that the XML documents in such a column are described by an XML schema. In DB2, for example, XSDs (XML Schema Definitions) can be used for this purpose. To facilitate the adaption of the vertical fragmentation technique from the relational model to XML, it is useful to assume that each XML element e has a label and a content type t. In particular, each column of type XML is thus associated with the root element e of an XML schema with label and content type t.

Nθ , . . , Nk . ,ki ≤ k. We use λ(Qj ) to indicate the site that issues query Qj , and use elemj = {ei |fji = fj } to indicate the set of leaf elements that are accessed by Qj , with fji as the frequency of the query Qj accessing ei . Here, fji = fj if the element ei is accessed by Qj . Otherwise, fji = 0. The term request of an element at a site θ is used to indicate the sum of frequencies of all queries at the site accessing the element or attribute: m requestθ (ei ) = fji . j=1,λ(Qj )=θ With the size i of an element ei , we can calculate the need of an element or attribute as the total data volume involved to retrieve ai by all the queries: fji · i .

Pi (e) with path expressions p1 , . . , pi . When applied to an XML element e the tree rooted at e will be reduced to the subtrees rooted at the subnodes selected by the specified path expression p1 , . . , pk plus the paths from e to these subnodes. The label of e will be the same as before, while the content type can be updated to reflect the reductions. Each node in an XML tree can be reached from the root node by a unique path. The labels along this path give rise to a simple path expression 0 / 1 / .

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