Orchestrazione di servizi e scenari avanzati: fruizione e necessità delle comunità di ricerca nel marketplace di H2IOSC

Since March 2023, the Italian node of the OPERAS research infrastructure (CNR-ILIESI) has been responsible for the feasibility study, technical specification, and service orchestration model for the H2IOSC – Humanities and Heritage Italian Open Science Cloud – Marketplace project. The Marketplace is designed to integrate heterogeneous resources from federated research infrastructures (OPERAS, E- RIHS, CLARIN, DARIAH), fostering cooperation and sharing between digital ecosystems on the one hand, and collaboration and active user engagement on the other. The paper describes the platform’s API-driven solution, with a three-tier architecture where application and descriptive workflows become key elements of the model. Specifically, the distinction between orchestration (in which the Marketplace coordinates services executed remotely on external systems) and composition (in which services operate locally within a single platform) is formalized. Application and descriptive workflows become key elements of the model, representing not only technical tools but also services capable of extending the Marketplace’s functionality and enabling advanced data processing and integration scenarios and collaborative features while preserving supplier accountability and system sustainability. The role of OAI-PMH-based harvesting protocols and flows, resource visualization, search methods, the creation and execution of application workflows using WSO2 Micro Integrator, and usage analysis tools are described. The Marketplace thus responds to project and user needs, becoming a socio-technical infrastructure capable of supporting research practices rather than a simple descriptive repository.