We present an overview of the SVOD web portal (System for Visualizing of Oncological Data) which is focused on population risk analyses related to cancer epidemiology and show its integration with the FP7 project TaToo (Tagging Tool based on a Semantic Discovery Framework). The developed TaToo Tools provide a semantic web solution in order to close the discovery gap that prevents full and easy access to specific web resources. Furhter more we will discuss in detail the used ontological resources, the integration of TaToo Tools into the SVOD portal together with the evaluation of this integration.