This deliverable delineates the state of the art of on process, business, data and epistemological ontologies that are to be used within the DIP 1 project. It presents the Semantic Web Service Usage process as a starting point to motivate the discussion, and to point out where each of the different ontologies fits. Further it introduces the different tools that currently help realizing the different parts of such usage process, and its relation with the different ontologies presented in the state-of-the-art, if any. Finally the requirements in terms of Service description and service requirements for DIP and Workpackage 3 of the DIP project 2 are presented. The intended audience of the deliverable is mainly the DIP project partners, in particular those involved in Workpackage 3 and Workpackage 4. Nevertheless, anyone interested on Service description and how semantically achieve if, may find it of interest. In regard to the impact of this deliverable for DIP, it provides a detailed state of the art on the technology available to describe Services, pointing out the lack or young state of