Despite the importance of analytical tools to organisations, they still lack the inference power needed to solve the requests of decision makers in a flexible way. Our approach aims at integrating business semantics into analytical tools by providing semantic descriptions of exploratory functionalities and available services. We propose an architecture for business intelligence, which uses semantic web technology based on IRS-III. In addition, we present OntoDSS, a prototype tool based on this architecture that illustrates some of the functionalities that may be provided to decision makers within an application scenario.