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Abstract: Terminologies and terminology services play a crucial role in the National Research Data Infrastructure (NFDI) and related fields, especially in the DACH region, to ensure the generation of FAIR research (meta)data. The primary objective of the Base4NFDI basic service Terminology Services 4 NFDI (TS4NFDI) is to standardize and harmonize terminology services, establishing an interoperable and sustainable solution. This solution will be integrated into the long-term NFDI infrastructure, ensuring consistency and reusability across domains, improving terminology management, and fostering cross-domain collaboration within the NFDI community. A comprehensive requirement analysis was conducted during the initialization phase of TS4NFDI, providing insights for its future development. A survey comprising 69 participants has provided valuable insights into the current challenges and needs for terminology
services. The analysis focused on three key groups: 1) developers (of web services), 2) managers of web services which want to interact with terminology services and 3) users working with terminologies. TS4NFDI developed work packages for the integration phase in response to survey participant feedback. The following key objectives have been identified: 1) The creation of collections and entity sets of terminologies (WP1), 2) the establishment of a NFDIwide mapping service (WP2), and 3) the provision of support for term requests (WP3). Furthermore, user requirements will be addressed in WP6, focusing on community engagement, communication, and training. This includes incubator projects to integrate terminology services into user services.

Keywords: terminology services, terminology, ontology, FAIR, metadata