Searching in research repositories
Data may have been made available for reuse in subject-specific or interdisciplinary repositories. Special search engines (see right) search diverse repositories simultaneously. Alternatively, re3data offers a summary of many currently operating research databases. If the search there provides suitable databases, the search for research data can also be carried out directly in the database.
The subsequent use of research data is usually determined by the license or other legal regulations under which the data was shared.
DataCite: International database for searching research data
BASE (Bielefeld Academic Search): search engine for scientific documents with a focus on freely available publications. Research data represent one of many searchable document types.
Otherwise published or unpublished
The traditional and still usable access to third party research data is to ask the authors of scientific articles directly about their data. In many cases, central data on which publications are based are also made available by publishers as "supplementary material".