Bibliographic Ontology
Ontology for books, articles, documents on the semantic web. Citation metadata for libraries and publishers.
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.
Digital library catalog systems
Citation management linked data
Academic publishing metadata
Research paper knowledge graphs
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 Web Standards.