+ <dc:date>2023-08-19</dc:date>
+ <cc:license
+ rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+ <dc:description>P&ID legend ISO 10628-2:2012(en) symbol groups 21-25 (valve; check valve; valves and fittings with safety functions; fittings; graphical symbols for piping). Drawing area and reference dimensions specified by ISO 5457:1999(en). Title block specified by ISO 7200:2004(en). Font is ISO 3098-compliant "osifont" ( https://tracker.debian.org/pkg/fonts-osifont ).</dc:description>