This session is targeted to all geoscientists, computer and information scientists who want to present their expertise and experiences in cross-project collaboration activities especially related to the design of technical solutions for the achievement of interoperability between different data management systems. Such questions as harvesting of metadata and data, the combining of data catalogs and repositories, the merge of underlying data models and used vocabularies, the mutual use of Web based application services and the general enhancement of data integration related to small and big data can be addressed.