The CODACMOS project aims to provide tools for improving the quality of official statistics, and for lowering the burden and costs for both data collectors and providers. To reach this goal it is necessary to improve the efficiency of data collection and to integrate the data exchange between National Statistical Institutes, Public Administrations and other data providers. CODACMOS will review the current state of art in electronic data interchange and metadata, by bringing together the key researchers and actors from relevant projects, and the representatives of international organizations and forums, such as the SDMX Task Force. CODACMOS will add value to the concepts, models, tools and solutions for data collection by examining solutions for enterprises and for households. Based on these findings, CODACMOS will identify the relevant key issues to that can be addressed by a new project in the Sixth Framework Programme concerning data collection and systems of metadata.