lib/bolognese/writers/rdf_xml_writer.rb in bolognese-0.9.19 vs lib/bolognese/writers/rdf_xml_writer.rb in bolognese-0.9.20

@@ -1,8 +1,10 @@
 module Bolognese
   module Writers
     module RdfXmlWriter
       def rdf_xml
+        return nil unless valid?
+        
         graph.dump(:rdfxml, prefixes: { schema: "http://schema.org/" })
       end
     end
   end
 end