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This article presents the design and pilot implementation of a suite of intelligent methods, algorithms, and tools for federating heterogeneous experimental platforms (domains) toward a holistic Future Internet experimentation ecosystem. The proposed framework developed within the NOVI research and experimentation European collaborative effort, aims at providing a modular data, control, and management plane architecture that includes: an information model capturing the abstractions of virtualized resources residing in different yet interworking experimental platforms; resource mapping algorithms tackling the inter-domain virtual network embedding problem; mechanisms providing interoperability of monitoring tools; policy-based management services for role-based intra and inter-domain management policies; and dataplane stitching mechanisms to enable the composition of user-specific slices (baskets of …