Information Inference Service (IIS) is a flexible data processing system for handling big data based on Apache Hadoop technologies. It is a subsystem of the OpenAIRE system and it uses algorithms to extract new entities and relations from full texts to enrich SKGs. In practice, IIS defines data processing workflows that connect various modules, each one with well-defined input and output. Functionalities: * Enhance metadata with information obtained through text and data mining * Improved linked open science * Improved research analytics Improved research monitoring and impact assessment * Customers get structured metadata related to the publications Funders have access to a list of publications that acknowledge their projects Content providers (Repository managers/ OA publishers) may enrich their content Roadmap TRL 9 (actual system proven in operational environment): used in the OpenAIRE production environment.