Datasea is a Spanish initiative to improve the know-how and best practices in research data storage and curation. Research data confirm the progress of science, but "the data value lies in its use" (Bits of Power, 1997). To maximize its cost, national and international organizations are improving mechanisms to share, analyse and preserve them. Both, the leaders of the G8 summit (June 2013) as the Communication of the European Commission Towards a thriving data-driven economy, indicate that the data derived from research and the results of scientific experiments are particularly valuable. The current paradigm of science, based on the evaluation of publications and patents, gradually includes data as a key piece of the value chain. Data are very different and belong to the long tail, or little data (Borgman, 2015).