diff --git a/plugins/virtuoso/lib/virtuoso_plugin.rb b/plugins/virtuoso/lib/virtuoso_plugin.rb
index 7b8e00d..0a1561c 100644
--- a/plugins/virtuoso/lib/virtuoso_plugin.rb
+++ b/plugins/virtuoso/lib/virtuoso_plugin.rb
@@ -1,7 +1,5 @@
 class VirtuosoPlugin < Noosfero::Plugin
 
-  @virtuosoServers
-  
   def self.plugin_name
     "Virtuoso integration"
   end
@@ -30,6 +28,12 @@ class VirtuosoPlugin < Noosfero::Plugin
     true
   end
 
+  def self.ontology_mapping_default_setting
+    VirtuosoPlugin::DublinCoreMetadata::FIELDS.map do |field|
+      {:source => "dc:#{field}", :target => "http://purl.org/dc/elements/1.1/#{field}"}
+    end
+  end
+
   protected
 
   def virtuoso_client_builder(uri, username, password)
diff --git a/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb b/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb
index e159fbb..18edb93 100644
--- a/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb
+++ b/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb
@@ -24,10 +24,10 @@ class VirtuosoPlugin::DspaceHarvest
     metadata = VirtuosoPlugin::DublinCoreMetadata.new(record.metadata)
     puts "triplify #{record.header.identifier}"
 
-    DC_CONVERSION.each do |c|
-      values = [metadata.send(c)].flatten.compact
+    settings.ontology_mapping.each do |mapping|
+      values = [metadata.extract_field(mapping[:source])].flatten.compact
       values.each do |value|
-        query = RDF::Virtuoso::Query.insert_data([RDF::URI.new(metadata.identifier), RDF::URI.new("http://purl.org/dc/elements/1.1/#{c}"), value]).graph(RDF::URI.new(@dspace_uri))
+        query = RDF::Virtuoso::Query.insert_data([RDF::URI.new(metadata.identifier), RDF::URI.new(mapping[:target]), value]).graph(RDF::URI.new(@dspace_uri))
         plugin.virtuoso_client.insert(query)
       end
     end
@@ -53,16 +53,15 @@ class VirtuosoPlugin::DspaceHarvest
     settings.save!
     puts "ending harvest #{harvest_time}"
   end
-    
+
   def self.harvest_all(environment, from_start)
     settings = Noosfero::Plugin::Settings.new(environment, VirtuosoPlugin)
     settings.dspace_servers.each do |k, v|
       harvest = VirtuosoPlugin::DspaceHarvest.new(environment, k[:dspace_uri])
       harvest.start(from_start)
-      harvest.run
-    end    
-  end  
-  
+    end
+  end
+
   def start(from_start = false)
     if find_job.empty?
       if from_start
diff --git a/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb b/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb
index f8990d4..62e85aa 100644
--- a/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb
+++ b/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb
@@ -21,7 +21,7 @@ class VirtuosoPlugin::DublinCoreMetadata
     when 1
       value.first.text
     else
-      value.map(&:text)
+      value.map { |v| v.respond_to?(:text) ? v.text : v}
     end
   end
 
diff --git a/plugins/virtuoso/test/unit/virtuoso_plugin_test.rb b/plugins/virtuoso/test/unit/virtuoso_plugin_test.rb
index eb35caf..9bda5e9 100644
--- a/plugins/virtuoso/test/unit/virtuoso_plugin_test.rb
+++ b/plugins/virtuoso/test/unit/virtuoso_plugin_test.rb
@@ -29,4 +29,8 @@ class VirtuosoPluginTest < ActiveSupport::TestCase
     plugin.virtuoso_readonly_client
   end
 
+  should 'has a default value for ontology mapping setting' do
+    assert plugin.settings.ontology_mapping
+  end
+
 end
--
libgit2 0.21.2