In this document we describe the state of the art of the four participating infrastructures in terms of training and define the training strategy of the project H2IOSC in terms of overall vision, and along the following 3 lines: - Building the H2IOSC the training infrastructure with a training portal and a depositing service for training materials (technical and functional requirements are described for both) - Creating an offer of common H2IOSC training materials, aimed at facilitating the use of the H2IOSC marketplace and pilots - Strengthening the disciplinary offer for the four participating infrastructures This is a living document, evolving during the life of the project with the natural upgrade of the awareness of the needs expressed by the various groups interested (users already in the community and identified potential users).