A comparison of two approaches to utilizing XML in parametric databases for temporal data |
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| Affiliation: | 1. Institute of information, Zhejiang University of Finance & Economics, Hangzhou 310018, China;2. The State Key Laboratory of Mechanical Transmissions, Chongqing University, Chongqing 400044, China;3. Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis, Guangxi University for Nationalities, Nanning 530006, China;4. The Provincial Key Laboratory for Computer Information Processing Technology, Soochow University, Suzhou 215006, China;1. Faculty of Humanities and Social Sciences, University of Split, Polji?ka cesta 35, 21000 Split, Croatia;2. Faculty of Electrical Engineering and Computing, University of Zagreb, Unska 3, 10000 Zagreb, Croatia |
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| Abstract: | The parametric data model captures an object in terms of a single tuple. This feature eliminates unnecessary self-join operations to combine tuples scattered in a temporal relation. Despite this advantage, this model is relatively difficult to implement on top of relational databases because the sizes of attributes are unfixed. Since data boundaries are not problematic in XML, XML can be an elegant solution to implement parametric databases for temporal data. There are two approaches to implementing parametric databases using XML: (1) a native XML database with XQuery engine, and (2) an XML storage with a temporal query language. To determine which approach is appropriate in parametric databases, we consider four questions: the effectiveness of XML in modeling temporal data, the applicability of XML query languages, the user-friendliness of the query languages, and system performances of two approaches. By evaluating the four questions, we show that the latter approach is more appropriate to utilizing XML in parametric databases. |
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