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9 papers · 1 filter
Enhancing XML Data Warehouse Query Performance by Fragmentation
Hadj Mahboubi, Jérôme Darmont
XML data warehouses form an interesting basis for decision-support applications that exploit heterogeneous data from multiple sources. However, XML-native database systems currentl…
Data Mining-based Fragmentation of XML Data Warehouses
Hadj Mahboubi, Jérôme Darmont
With the multiplication of XML data sources, many XML data warehouse models have been proposed to handle data heterogeneity and complexity in a way relational data warehouses fail…
Expressing OLAP operators with the TAX XML algebra
Marouane Hachicha, Hadj Mahboubi, Jérôme Darmont
With the rise of XML as a standard for representing business data, XML data warehouses appear as suitable solutions for Web-based decision-support applications. In this context, it…
Knowledge and Metadata Integration for Warehousing Complex Data
Jean-Christian Ralaivao, Jérôme Darmont
With the ever-growing availability of so-called complex data, especially on the Web, decision-support systems such as data warehouses must store and process data that are not only…
Dynamic index selection in data warehouses
Stéphane Azefack, Kamel Aouiche, Jérôme Darmont
Analytical queries defined on data warehouses are complex and use several join operations that are very costly, especially when run on very large data volumes. To improve response…
Data Mining-based Materialized View and Index Selection in Data Warehouses
Kamel Aouiche, Jérôme Darmont
Materialized views and indexes are physical structures for accelerating data access that are casually used in data warehouses. However, these data structures generate some maintena…