"The present document describes standardisation requirements for cloud services. It is based on the outcome of the ETSI TC GRID Workshop@ ""Grids@ Clouds and Service Infrastructures""@ 2 and 3 December 2009. This event brought together key stakeholders of the grid@ cloud and telecommunication domains to review state of the art and current trends. Needs for standardisation@ with a particular focus on the emerging area of cloud computing and services@ were discussed. The present document introduces and expands on the conclusions reached. This is not an exhaustive survey and is intended to serve as the basis for future work."