Decision-making systems aim to transform the data stream circulating through the organization to relevant information and knowledge published in the form of dashboards and reports. The Semantic Web (SW) is full of data sources serialized in various formats and extensions (e.g. RDF, OWL, XML, etc) and they are created from scratch or by the transformation of other existing sources (e.g. relational database), and so it became one of the most major data sources that can be used to fulfill the

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... sis' needs in a decision-making system. The OWL 2 ontology language as a W3C recommendation is built on the RDF data model and used to provide the means for defining and creating structured web ontologies. The purpose of this paper is to propose a new architectural system to perform a data integration process to populate an existing data warehouse using linked data (i.e. data from semantic web) as sources.