| Publisher | University of Ioannina | ||
|---|---|---|---|
| Format | 263.6KB PDF | Date added | 06 May 2003 |
| Topics | Data Acquisition - ETL, Business Intelligence - Data Warehousing | ||
| Downloads | 3 | ||
Extraction-Transformation-Loading (ETL) tools are pieces of software responsible for the extraction of data from several sources, their cleansing, customization and insertion into a data warehouse. This paper proposes a methodology for the earliest stages of the data warehouse design, with the goal of tracing the analysis of the structure and content of the existing data sources and their intentional mapping to the common conceptual data warehouse model. The methodology comprises a set of steps that can be summarized as follows: (a) identification of the proper data stores; (b) candidates and active candidates for the involved data stores; (c) attribute mapping between the providers and the consumers, and (d) annotation of the diagram with runtime constraints.
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