European Open Science Cloud FAIR data principles persistent identifiers FAIR data metadata research data research data management semantic artefacts semantic interoperability Data Curation EOSC ESFRIs European Open Science Cloud (EOSC) FAIR principles Glossaries Identifiers Interoperability Framework(s) Linked data Ontologies Open Science Research data management Research infra structure SelfAdministeredQuestionnaire Semantic interoperability Service(s) data managers digital research infrastructures findability identifiers interoperability linked data ontologies research infra structure research infrastructures research organisations reusability semantic technologies software survey data surveys vocabularies