[1] [CITE@en[RDF 1.1 Concepts and Abstract Syntax]]
( ([TIME[2011-08-30 03:07:16 +09:00]] 版))
<http://www.w3.org/TR/2011/WD-rdf11-concepts-20110830/>

[2] [CITE@en[RDF 1.1 Concepts and Abstract Syntax]]
( ([TIME[2014-01-07 16:23:40 +09:00]] 版))
<http://www.w3.org/TR/2014/PR-rdf11-concepts-20140109/>