| "This very simple ontology is intended to capture the most basic classes and properties required to differentiate between changing and unchanging things in the world." [lang: en] |
| http://purl.org/net/d4# |
| xsd | http://www.w3.org/2001/XMLSchema# |
| d4 | http://purl.org/net/d4# |
| rdfs | http://www.w3.org/2000/01/rdf-schema# |
| rdf | http://www.w3.org/1999/02/22-rdf-syntax-ns# |
| owl | http://www.w3.org/2002/07/owl# |