745 search results - page 23 / 149 » Towards a Formal Approach for Object Database Design |
170
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ICDE
2008
IEEE
15 years 11 months ago
2008
IEEE
Aggregation is among the core functionalities of OLAP systems. Frequently, such queries are issued in decision support systems to identify interesting groups of data. When more tha...
DAWAK
2006
Springer
14 years 11 months ago
2006
Springer
Abstract. Data warehouses (DW) main objective is to facilitating decisionmaking. Thus their development has to take into account DW project actor requirements. While much recent re...
MODELS
2007
Springer
15 years 3 months ago
2007
Springer
Abstract We have previously proposed an expressive UML-based language for constructing and transforming security-design models, which are models that combine design specifications...
184
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GIS
2008
ACM
15 years 11 months ago
2008
ACM
Geospatial information integration is not a trivial task. An integrated view must be able to describe various heterogeneous data sources and its interrelation to obtain shared con...
PODS
1993
ACM
15 years 1 months ago
1993
ACM
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...