{"doi":"10.1038/s41597-023-02462-y","title":"re3data – Indexing the Global Research Data Repository Landscape Since 2012","abstract":"For more than ten years, re3data, a global registry of research data repositories (RDRs), has been helping scientists, funding agencies, libraries, and data centers with finding, identifying, and referencing RDRs. As the world's largest directory of RDRs, re3data currently describes over 3,000 RDRs on the basis of a comprehensive metadata schema. The service allows searching for RDRs of any type and from all disciplines, and users can filter results based on a wide range of characteristics. The re3data RDR descriptions are available as Open Data accessible through an API and are utilized by numerous Open Science services. re3data is engaged in various initiatives and projects concerning data management and is mentioned in the policies of many scientific institutions, funding organizations, and publishers. This article reflects on the ten-year experience of running re3data and discusses ten key issues related to the management of an Open Science service that caters to RDRs worldwide.","journal":"Scientific 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Strecker","orcid":"0000-0002-9754-3807","position":2,"is_corresponding":false},{"id":54089,"name":"Michael Witt","orcid":"0000-0003-4221-7956","position":3,"is_corresponding":false},{"id":54090,"name":"Paul Vierkant","orcid":"0000-0003-4448-3844","position":4,"is_corresponding":false},{"id":54091,"name":"Kirsten Elger","orcid":"0000-0001-5140-8602","position":5,"is_corresponding":false},{"id":54092,"name":"Roland Bertelmann","orcid":"0000-0002-5588-0290","position":6,"is_corresponding":false},{"id":54093,"name":"Matthew Buys","orcid":"0000-0001-7234-3684","position":7,"is_corresponding":false},{"id":54094,"name":"Lea Maria Ferguson","orcid":"0000-0002-7060-3670","position":8,"is_corresponding":false},{"id":54095,"name":"Maxi Kindling","orcid":"0000-0002-0167-0466","position":9,"is_corresponding":false},{"id":54096,"name":"Rachael Kotarski","orcid":"0000-0001-6843-7960","position":10,"is_corresponding":false},{"id":54097,"name":"Vivien Petras","orcid":"0000-0002-8113-1509","position":11,"is_corresponding":false},{"id":54086,"name":"Heinz Pampel","orcid":"0000-0003-3334-2771","position":0,"is_corresponding":true}],"reference_count":97,"raw_metadata":null,"created_at":"2026-03-01T18:20:47.508186Z","pmid":"37644024","pmcid":"PMC10465540","fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":"gold","license":"cc-by","views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":77.5,"fair_a":67.5,"fair_i":37.5,"fair_r":50.0,"fair_zscore":1.1681,"fair_rationale":{"fair_score":58.12,"has_llm":true,"dimensions":{"F":{"name":"Findable","score":77.5,"criteria":[{"key":"f_has_doi","label":"Has a persistent DOI","kind":"deterministic","weight":1.0,"fraction":1.0,"signal":"DOI present","rationale":null},{"key":"f_repository_presence","label":"Indexed in repositories / literature DBs","kind":"deterministic","weight":1.0,"fraction":1.0,"signal":"datacite=0, pmcid=True, pmid=True","rationale":null},{"key":"f_persistent_ids","label":"Resolvable scholarly identifiers (OpenAlex)","kind":"deterministic","weight":0.5,"fraction":0.0,"signal":"no OpenAlex id","rationale":null},{"key":"f_metadata_richness","label":"Rich, machine-readable metadata","kind":"llm","weight":1.0,"fraction":0.75,"signal":null,"rationale":"The paper describes a comprehensive metadata schema for RDRs, but does not provide evidence of machine-readable metadata in a standard format like JSON-LD or RDF."}]},"A":{"name":"Accessible","score":67.5,"criteria":[{"key":"a_open_access","label":"Open Access / files deposited","kind":"deterministic","weight":1.5,"fraction":1.0,"signal":"Open Access","rationale":null},{"key":"a_retrievable","label":"Free full text retrievable","kind":"deterministic","weight":1.0,"fraction":0.0,"signal":"0 OA location(s)","rationale":null},{"key":"a_access_protocol","label":"Clear data/code access protocol","kind":"llm","weight":1.0,"fraction":0.75,"signal":null,"rationale":"The paper states that re3data metadata is accessible via an API and under CC0 license, but does not specify if the API requires authentication or has clear access protocols."}]},"I":{"name":"Interoperable","score":37.5,"criteria":[{"key":"i_linked_data","label":"Linked datasets / DataCite relations","kind":"deterministic","weight":1.0,"fraction":0.0,"signal":"linked_datasets=0, datacite=0","rationale":null},{"key":"i_standard_ids","label":"References data via standard accessions","kind":"deterministic","weight":1.0,"fraction":0.0,"signal":"accessions=0, trials=0","rationale":null},{"key":"i_standards","label":"Standard formats, vocabularies & identifiers","kind":"llm","weight":1.0,"fraction":0.75,"signal":null,"rationale":"The paper mentions use of standards like ISO 639-3, ISO 8601, and DFG classification, but does not provide evidence of consistent use of persistent identifiers or standard vocabularies across all metadata."}]},"R":{"name":"Reusable","score":50.0,"criteria":[{"key":"r_license","label":"Clear, open reuse license","kind":"deterministic","weight":1.5,"fraction":0.0,"signal":"no license","rationale":null},{"key":"r_downloads","label":"Demonstrated reuse (downloads)","kind":"deterministic","weight":0.5,"fraction":1.0,"signal":"downloads=118","rationale":null},{"key":"r_version","label":"Versioned / maintained","kind":"deterministic","weight":0.5,"fraction":0.0,"signal":"no version chain","rationale":null},{"key":"r_dataset","label":"Classified as a data resource","kind":"deterministic","weight":0.5,"fraction":1.0,"signal":"is_dataset","rationale":null},{"key":"r_reusability","label":"Data-availability statement, license & reproducibility","kind":"llm","weight":2.0,"fraction":0.667,"signal":null,"rationale":"The paper includes a data availability statement (CC0) and mentions Jupyter notebooks for reuse, but does not provide a formal license for the code or detailed reproducibility information."}]}},"suggestions":["Provide metadata in a machine-readable format such as JSON-LD or RDF to enhance findability.","Specify whether the API requires authentication and document access protocols clearly.","Use persistent identifiers (e.g., DOIs) for all RDR descriptions and standard vocabularies consistently.","Include a formal software license for the Jupyter notebooks and source code to improve reusability.","Add a reproducibility checklist or detailed instructions for reproducing the analysis of RDR landscape."],"model":"deepseek/deepseek-v4-flash","agent_version":"fair_agent_v2","fulltext_source":"epmc_xml"},"fair_model":"deepseek/deepseek-v4-flash","fair_agent_version":"fair_agent_v2","fair_fulltext_source":"epmc_xml","fair_has_llm":true,"fair_computed_at":"2026-06-18T00:47:39.968081Z","clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}