"Linked Data" . . . "Graph Database" . . "Knowledge Graph" . . . . . . "Virtuoso" . "Web 3.0"@en . "OpenLink Virtuoso offers two primary types of licenses\n\n: Open-Source and Commercial. The open-source version is covered under the GNU General Public License (GPL), whereas the commercial license comes with more advanced features and professional support."@en . "Semantic Web" . "OpenLink Virtuoso offers two primary types of licenses\n\n: Open-Source and Commercial. The open-source version is covered under the GNU General Public License (GPL), whereas the commercial license comes with more advanced features and professional support."@en . . .