Database and Expert Systems Applications: 20th International - download pdf or read online

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By Hamideh Afsarmanesh, Luis M. Camarinha-Matos (auth.), Sourav S. Bhowmick, Josef Küng, Roland Wagner (eds.)

ISBN-10: 3642035736

ISBN-13: 9783642035739

This e-book constitutes the refereed lawsuits of the 20 th overseas convention on Database and professional structures purposes, DEXA 2009, held in Linz, Austria, in August/September 2009.

The 35 revised complete papers and 35 brief papers provided have been rigorously reviewed and chosen from 202 submissions. The papers are geared up in topical sections on XML and databases; net, semantics and ontologies; temporal, spatial, and excessive dimensional databases; database and knowledge method structure, functionality and defense; question processing and optimisation; information and data integration and caliber; facts and data streams; facts mining algorithms; information and data modelling; details retrieval and database structures; and database and knowledge approach structure and performance.

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Extra resources for Database and Expert Systems Applications: 20th International Conference, DEXA 2009, Linz, Austria, August 31 – September 4, 2009. Proceedings

Example text

Course. We now define a path instance, which is essentially a downward sequence of nodes in an XML tree. Definition 3. A path instance p = v1 . vn in a tree T = (V, E, lab, val, vρ ) is a non-empty sequence of nodes in V such that v1 = vρ and for all i ∈ [2, n], vi−1 = parent(vi ). The path instance p is said to be defined over a path P = l1 . ln , if lab(vi ) = li for all i ∈ [1, n]. For example, referring to Fig. course. The next definition specifies the set of nodes reachable in a tree T from the root node by following a path P .

Pi , T) and v ∈ ancestor(vi ), iii) for all i, j ∈ [1, n], closest(vi , vj ) = true, then there exists an RHS selector node v and field nodes v1 , . . Pi , T) and v ∈ ancestor(vi ), iii’) for all i, j ∈ [1, n], closest(vi , vj ) = true, iv’) for all i ∈ [1, n], val(vi ) = val(vi ). For instance, the XML tree in Fig. course, [cno, day, sem])).

In particular, these proposals for XML inclusion constraints do not always allow one to extend the semantics of a relational inclusion dependency (IND), which we now illustrate by the example of an XML publishing scenario. Fig. 1 shows two relations teaches and offer. S. Bhowmick, J. K¨ ung, and R. ): DEXA 2009, LNCS 5690, pp. 23–37, 2009. c Springer-Verlag Berlin Heidelberg 2009 24 M. Karlinger, M. Vincent, and M. Schrefl the lecturer, cno is the identifier of the course they are teaching, day is the day of the week that the course is being taught and sem is the semester in which the course is taught.

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Database and Expert Systems Applications: 20th International Conference, DEXA 2009, Linz, Austria, August 31 – September 4, 2009. Proceedings by Hamideh Afsarmanesh, Luis M. Camarinha-Matos (auth.), Sourav S. Bhowmick, Josef Küng, Roland Wagner (eds.)


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