optics https://w3id.org/framester/wn/wn30/wndomains/wn-domain-optics <https://w3id.org/framester/wn/wn30/wndomains/WNDomain> rdfs:label optics rdf:type <https://w3id.org/framester/wn/wn30/wndomains/WNDomain> <https://w3id.org/framester/wn/wn30/wndomains/isSubDomainOf> <https://w3id.org/framester/wn/wn30/wndomains/wn-domain-physics> risorse dalla linked data cloud