The research data spring project "Collaboration for Research Enhancement by Active use of Metadata" slides for the third sandpit workshop. Project partners: University of Southampton: Simon Coles (Principal Investigator); Jeremy Frey; Colin Bird (Project Coordinator); Cerys Willoughby University of Edinburgh: Mike Mineter; Magnus Hagdorn University of the Arts London: Athanasios Velios; Iris Garrelfs Science & Technology Facilities Council (STFC): Tom Griffin; Brian Matthews Nine by Nine: Graham Klyne