* Even though deprecated, when matching a quoted triple (<< ... >>)…

… be sure it's not a triple term (`<<( ... )>>`).

* Add `rdf:reifies` to the RDF vocabulary.

lib/rdf/ntriples/reader.rb

@@ -261,7 +261,7 @@ def read_tripleTerm
     # @return [RDF::Statement]
     # @deprecated Quoted triples are now deprecated
     def read_quotedTriple
-      if @options[:rdfstar] && match(QT_START)
+      if @options[:rdfstar] && !match(TT_START) && match(QT_START)
         warn "[DEPRECATION] RDF-star quoted triples are deprecated and will be removed in a future version.\n" +
              "Called from #{Gem.location_of_caller.join(':')}"
         subject   = read_uriref || read_node || read_quotedTriple || fail_subject

lib/rdf/vocab/rdfv.rb

@@ -72,6 +72,10 @@ module RDF
   #     # @return [RDF::Vocabulary::Term]
   #     # @attr_reader :value
   #
+  #     # Reification predicate
+  #     # @return [RDF::Vocabulary::Term]
+  #     # @attr_reader :reifies
+  #
   #     # The datatype of RDF literals storing fragments of HTML content.
   #     # @return [RDF::Vocabulary::Term]
   #     # @attr_reader :HTML
@@ -253,6 +257,12 @@ def name; "RDF"; end
       range: "http://www.w3.org/2000/01/rdf-schema#Resource".freeze,
       isDefinedBy: %(http://www.w3.org/1999/02/22-rdf-syntax-ns#).freeze,
       type: "http://www.w3.org/1999/02/22-rdf-syntax-ns#Property".freeze
+    property :reifies,
+      comment: %(Property relating to a Triple Term.).freeze,
+      domain: "http://www.w3.org/2000/01/rdf-schema#Resource".freeze,
+      label: "reifies".freeze,
+      isDefinedBy: %(http://www.w3.org/1999/02/22-rdf-syntax-ns#).freeze,
+      type: "http://www.w3.org/1999/02/22-rdf-syntax-ns#Property".freeze
 
     # Datatype definitions
     term :HTML,