Knowledge TV is a research project aiming at improving users and content producers experience and use of Digital TV resources. While iTV content is aimed at human manipulation, it does not appropriately support the performance of computational processes, such as search engines. The main problem is that the meaning of multimedia documents cannot be explored, reducing the actuation limit of services and applications. In this context, this project proposes the definition of a semantic layer to the iTV platform, based on the Semantic Web concepts, which organizes its content and offers intelligent services, such as semantic queries and recommendation. Thus, this project tries to avoid the same problems that are currently presented by the Web platform, following the Semantic Web trend and increasing the potential to the development of more advanced applications. This technology is being developed in accordance with the Ginga project, which is the official specification for the Brazilian iTV middleware.