Connecting data spaces and data marketplaces and the progress toward the european single digital market with open-source software

In this book chapter, recent advances in the development and implementation of open-source software technologies and information management systems to support the progression of the data economy by means of data operations and data offering descriptions are introduced. The management of controlled registries, mapping of information using metadata aggregation, interfaces among components, links of data and actors, discovery and retrieval of data, compiling smart contracts, and other core operations are introduced. This chapter contributes to the state of the art by providing the definition, creation, and collection of data-driven marketplaces that, by design, look at sharing and exchanging data using a common description framework called i3-MARKET. i3-MARKET's main design objectives are to support the sharing data assets, execute operations, and provide API services and generally all the security-related functionalities relying on data details, credentials, contracts, and pricing. i3-MARKET also uses a sharing semantic model to facilitate the work with people in improving and maintaining the models for the present and future. The i3-MARKET described in the chapter introduces the concept of a backplane architecture as a support tool that aims to innovate the data market industry providing solutions and support in developing building blocks to overcome the barriers to interoperable and integrative data using trusted, federated, and decentralized software components.