xsd
[skosxl]() http://www.w3.org/2008/05/skos-xl#
[dcat]() http://http://www.w3.org/ns/org#www.w3.org/ns/dcat#
[org]() http://www.w3.org/ns/org#
[vcard]() http://www.w3.org/2006/vcard/ns#
[geonames]() http://www.geonames.org/ontology#
[gr]() http://purl.org/goodrelations/v1#
[prov]() http://www.w3.org/ns/prov#
[dcterm]() http://purl.org/dc/terms/
[sioc]() http://rdfs.org/sioc/ns#
[mo]() http://musicontology.com/
[MarineTLO]() http://ics.forth.gr/Ontology/MarineTLO/icore# http://ics.forth.gr/Ontology/MarineTLO/imarine#
[schema]() http://schema.org/
yago
dbpedia
https://dase.cs.wright.edu/content/modl-modular-ontology-design-library