By Shojiro Nishio, Katsumi Tanaka, Yasuo Ariki, Shinji Shimojo, Masahiko Tsukamoto (auth.), Július à tuller, Jaroslav Pokorný, Bernhard Thalheim, Yoshifumi Masunaga (eds.)
This quantity offers the refereed lawsuits of the East-European convention on Advances in Databases and data platforms and of the overseas convention on Database platforms for complicated functions, ADBIS-DASFAA 2000, held together in Prague, Czech Republic in September 2000.
The 27 revised papers provided including one invited paper and the summary of an invited speak have been rigorously reviewed and chosen from one hundred fifteen submissions. The papers current new effects on various present concerns in database examine and layout with a undeniable emphasis on complicated purposes in quite a few fields.
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Extra info for Current Issues in Databases and Information Systems: East-European Conference on Advances in Databases and Information Systems Held Jointly with International Conference on Database Systems for Advanced Applications, ADBIS-DASFAA 2000 Prague, Czech Republ
An Advanced Processing Environment 17 LoD of the objects according to their movement in the virtual space as shown in Fig. 7. We also applied a similar mechanism to a real-time video. The system is called Name-at. The video camera parameters, such as pan and tilt values, are controlled by remote users through the network. Semistructured information, such as text, is associated with the objects shown in the video (camera parameters in a practical sense). The video whose LoD is controlled according to the zoom parameter of the camera is overlaid with the associated information.
The choice criterion is the current size of the domain. ECLiPSe uses so called delayed goals to perform a full look-ahead in order to reduce domain sizes. First results indicate that schema matches can indeed be found without backtracking. We believe that this uniform constraint framework can be an alternative to the many different database traversal strategies discussed e. g. in [MW99]. On the other hand, constraint systems need to be improved with respect to physical aspects of query optimization.
The predicate schema and its minimal matches We now add a little more semantics to the schemata in order to use them as a base for querying. We add the notions of variables and quantifiers to describe paths. Adding variables is in the flavor of the join operation in the relational world. The example schema in Figure 3 matches every object with the name being the same as the profession. Paths are an important concept in semistructured data. This is due to the observation that sometimes information is represented at different levels of granularity.