Titlebook: New Trends in Database and Information Systems II; Selected papers of t Nick Bassiliades,Mirjana Ivanovic,Athena Vakali Conference proceedi

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A Content-Driven ETL Processes for Open Dataproblematic characteristics such as semantic and structural heterogeneousness, lack of schemas, autonomy and dispersion. These characteristics shakes the traditional Extract-Transform-Load (ETL) processes since these latter generally deal with well structured schemas. We propose in this paper a cont

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Data Integration Patterns for Data Warehouse Automation, impact analysis, data quality and integration problems in data warehouse environments. We introduce a declarative mapping formalization technique, an abstract expression pattern concept and a related template engine technology for flexible ETL code generation and execution. The feasibility and eff

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Storing Long-Lived Concurrent Schema and Data Versions in Relational Databasesmany computing services in the cloud. Two significant issues in managing a relational database in a cloud environment are handling the inevitable evolution of the database schema and managing changes to system configuration and other data stored in the database as the system evolves over time. Techn

Pruritus

An Empirical Approach to Query-Subquery Nets with Tail-Recursion Eliminationimination. The aim is to improve the QSQN method by avoiding materialization of intermediate results during the processing. We illustrate the efficiency of our method by empirical results, especially for tail-recursive cases.

Autobiography

Reasoning over Spatial Orientation Relations Using Rulesanguage terms such as “Left”), since precise arithmetic descriptions using coordinates and angles are not always available. A basic aspect of spatial information is directional relations, thus embedding directional spatial relations into ontologies along with their semantics and reasoning rules is a