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The complexity of the Data Warehouse (DW) development process requires to follow a methodological approach in order to be successful. A widely accepted approach for this development is the hybrid one, in which requirements and data sources must be accommodated to a new DW model. The main problem is that we lose the relationships between requirements, elements in the conceptual models and data sources in the process, since no traceability is explicitly specified. Therefore, this hurts requirements validation capability and increases the complexity of Extraction, Transformation and Load processes. In this paper, we propose the first trace metamodel for DWs and focus on the relationships between requirements and conceptual models. We propose a set of Query/View/Transformation rules to include traceability in DWs in an automatic way, allowing us to trace every requirement to the conceptual model and further increasing user satisfaction.

A Trace Metamodel Proposal Based on the Model Driven Architecture Framework for the Traceability of User Requirements in Data Warehouses