. _:vb50999581 . _:vb50999581 . _:vb50999581 "2008-05-xx" . "Thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', and other types of controlled vocabulary are all examples of concept schemes. Concept schemes are also embedded in glossaries and terminologies."@en . . _:vb50999581 "Initial description." . "A concept scheme may be defined to include concepts from different sources."@en . "2008-05-xx" . "A set of concepts, optionally including statements about semantic relationships between those concepts."@en . "Concept Scheme"@en . . . _:vb50999581 "Sean Bechhofer" .