Use https://unlicense.org/ as doap:license.

Author: gkellogg

etc/doap.nq

@@ -7,7 +7,7 @@
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://bhuga.net/#ben> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://ar.to/#self> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://greggkellogg.net/foaf#me> .
-<https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#license> <http://creativecommons.org/licenses/publicdomain/> .
+<https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#license> <https://unlicense.org/> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://bhuga.net/#ben> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://ar.to/#self> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://greggkellogg.net/foaf#me> .

etc/doap.nt

@@ -7,7 +7,7 @@
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://bhuga.net/#ben> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://ar.to/#self> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#documenter> <https://greggkellogg.net/foaf#me> .
-<https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#license> <http://creativecommons.org/licenses/publicdomain/> .
+<https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#license> <https://unlicense.org/> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://bhuga.net/#ben> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://ar.to/#self> .
 <https://rubygems.org/gems/rdf> <http://usefulinc.com/ns/doap#developer> <https://greggkellogg.net/foaf#me> .

etc/doap.ttl

@@ -8,7 +8,7 @@
 <> a doap:Project ;
   doap:name          "RDF.rb" ;
   doap:homepage      <https://rubygems.org/gems/rdf> ;
-  doap:license       <http://creativecommons.org/licenses/publicdomain/> ;
+  doap:license       <https://unlicense.org/> ;
   doap:shortdesc     "A Ruby library for working with Resource Description Framework (RDF) data."@en ;
   doap:description   "RDF.rb is a pure-Ruby library for working with Resource Description Framework (RDF) data."@en ;
   doap:created       "2007-10-23" ;