Data Documentation Initiative
International standard for social/behavioral/health science data. Full data lifecycle metadata.
Visit WebsiteBrowse the tree, filter it, or click any class to see just its corner of it.
Where this one tends to earn its keep.
Survey and questionnaire documentation
Social science data archiving
Research data management plans
Cross-study data harmonization
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Software & Data.