By Gunnar Auth, Eitel von Maur (auth.), Akmal B. Chaudhri, Rainer Unland, Chabane Djeraba, Wolfgang Lindner (eds.)

ISBN-10: 3540001301

ISBN-13: 9783540001300

ISBN-10: 3540361286

ISBN-13: 9783540361282

This quantity contains papers from the subsequent 3 workshops that have been a part of the total application for the foreign convention on Extending Database know-how (EDBT) held in Prague, Czech Republic, in March 2002: XML-Based facts administration (XMLDM) moment overseas Workshop on Multimedia facts and rfile Engineering (MDDE) younger Researchers Workshop (YRWS) jointly, the 3 workshops featured forty eight top quality papers chosen from nearly one hundred thirty submissions. It was once, consequently, tough to choose the papers that have been to be permitted for presentation. We think that the permitted papers considerably give a contribution to their specific fields of study. The workshops have been an exceptional foundation for severe and hugely fruitful discussions. the standard and volume of papers convey that the components of curiosity for the workshops are hugely lively. a good number of first-class researchers are operating in correct fields generating study output that's not merely of curiosity to different researchers but additionally for undefined. The organizers and contributors of the workshops have been hugely chuffed with the output. The top of the range of the presenters and workshop contributors contributed to the luck of every workshop. the fantastic surroundings of Prague and the positioning of the EDBT convention additionally contributed to the final luck. final, yet no longer least, our honest due to the convention organizers – the organizing group used to be consistently keen to aid and if there have been issues that didn't paintings, assistance used to be quick available.

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Extra info for XML-Based Data Management and Multimedia Engineering — EDBT 2002 Workshops: EDBT 2002 Workshops XMLDM, MDDE, and YRWS Prague, Czech Republic, March 24–28, 2002 Revised Papers

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The metrics represented in this paper can only evaluate the metrics itself, that means only the second aspect. We now introduce a DTD for storing publications (figure 4) as a running example for illustrating all metrics. This sample DTD is compact and yet quite complex. Figure 5 shows a graph representing the DTD from figure 4. You can see in this visualisation that the textual representation of the sample DTD doesn’t look difficult, but the representation as a graph looks a bit more complex. In this section, we develop five metrics.

42 S. Luj´ an-Mora, E. Medina, and J. Trujillo For example, in Fig. 6 we show an example of navigation for one of the presentations. The first page is showed in Fig. 1 and contains the general description of the model: name, creation date, last modified, and the names of the fact classes and dimension classes, which are active links. Whenever it is possible, there is a link connecting different pieces of information. For example, if the fact class Sales is selected, the page showed in Fig. 2 is loaded.

By default, all measures in the fact class are considered additive. For nonadditive measures, additive rules are defined as constraints and are also placed in somewhere around the fact class. Furthermore, derived measures can also be explicitly considered (indicated by / ) and their derivation rules are placed between braces in somewhere around the fact class. This OO approach also allows us to define identifying attributes in the fact class, if convenient, by placing the constraint {OID} next to a measure name.

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XML-Based Data Management and Multimedia Engineering — EDBT 2002 Workshops: EDBT 2002 Workshops XMLDM, MDDE, and YRWS Prague, Czech Republic, March 24–28, 2002 Revised Papers by Gunnar Auth, Eitel von Maur (auth.), Akmal B. Chaudhri, Rainer Unland, Chabane Djeraba, Wolfgang Lindner (eds.)


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