A Framework for the Classification and Description of Multidimensional Data Models

Author(s):  
Alberto Abelló ◽  
José Samos ◽  
Félix Saltor
2000 ◽  
pp. 87-105 ◽  
Author(s):  
Matthias Jarke ◽  
Maurizio Lenzerini ◽  
Yannis Vassiliou ◽  
Panos Vassiliadis

2019 ◽  
Vol 15 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Ferrahi Ibtisam Ibtisam ◽  
Sandro Bimonte ◽  
Kamel Boukhalfa

The emergence of spatial or geographic data in DW Systems defines new models that support the storage and manipulation of the data. The need to build an SDW and to optimize SOLAP queries continues to attract the interest of researchers in recent years. Several spatial data models have been investigated to extend classical multidimensional data models with spatial concepts. However, most of existing models do not handle a non-strict spatial hierarchy. Moreover, the complexity of the spatial data makes the execution time of spatial queries very considerable. Often, spatial indexation methods are applied to optimizing access to large volumes of data and helps reduce the cost of spatial OLAP queries. Most of existing indexes support predefined spatial hierarchies. The authors show, in this article, that the logical models proposed in the literature and indexing techniques are not suitable to non-strict hierarchies. The authors propose a new logical schema supporting the non-strict hierarchies and a bitmap index to optimize queries defined by spatial dimensions with several non-strict hierarchies.


Informatica ◽  
2015 ◽  
Vol 26 (2) ◽  
pp. 283-312
Author(s):  
Igor Korelič ◽  
Violeta Mirchevska ◽  
Vladislav Rajkovič ◽  
Mirjana Kljajić Borštnar ◽  
Matjaž Gams

2017 ◽  
Vol 44 (6) ◽  
pp. 406-411
Author(s):  
A. A. Akhrem ◽  
V. Z. Rakhmankulov ◽  
K. V. Yuzhanin

2003 ◽  
pp. 87-105
Author(s):  
Matthias Jarke ◽  
Maurizio Lenzerini ◽  
Yannis Vassiliou ◽  
Panos Vassiliadis

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