diff --git a/plugins/virtuoso/Gemfile b/plugins/virtuoso/Gemfile
new file mode 100644
index 0000000..6c259c5
--- /dev/null
+++ b/plugins/virtuoso/Gemfile
@@ -0,0 +1,3 @@
+gem 'rdf'
+gem 'rdf-virtuoso'
+gem 'oai'
diff --git a/plugins/virtuoso/controllers/virtuoso_plugin_admin_controller.rb b/plugins/virtuoso/controllers/virtuoso_plugin_admin_controller.rb
new file mode 100644
index 0000000..d5edf08
--- /dev/null
+++ b/plugins/virtuoso/controllers/virtuoso_plugin_admin_controller.rb
@@ -0,0 +1,23 @@
+class VirtuosoPluginAdminController < AdminController
+
+  def index
+    settings = params[:settings]
+    settings ||= {}
+    @settings = Noosfero::Plugin::Settings.new(environment, VirtuosoPlugin, settings)
+    @harvest_running = VirtuosoPlugin::DspaceHarvest.new(environment).find_job.present?
+
+    if request.post?
+      @settings.save!
+      session[:notice] = 'Settings succefully saved.'
+      redirect_to :action => 'index'
+    end
+  end
+
+  def force_harvest
+    harvest = VirtuosoPlugin::DspaceHarvest.new(environment)
+    harvest.start
+    session[:notice] = _('Harvest started')
+    redirect_to :action => :index
+  end
+
+end
diff --git a/plugins/virtuoso/lib/virtuoso_plugin.rb b/plugins/virtuoso/lib/virtuoso_plugin.rb
new file mode 100644
index 0000000..f621956
--- /dev/null
+++ b/plugins/virtuoso/lib/virtuoso_plugin.rb
@@ -0,0 +1,11 @@
+class VirtuosoPlugin < Noosfero::Plugin
+
+  def self.plugin_name
+    "Virtuoso integration"
+  end
+
+  def self.plugin_description
+    _('Virtuoso integration')
+  end
+
+end
diff --git a/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb b/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb
new file mode 100644
index 0000000..28b8f1f
--- /dev/null
+++ b/plugins/virtuoso/lib/virtuoso_plugin/dspace_harvest.rb
@@ -0,0 +1,71 @@
+#inspired by https://github.com/code4lib/ruby-oai/blob/master/lib/oai/harvester/harvest.rb
+class VirtuosoPlugin::DspaceHarvest
+
+  DC_CONVERSION = [:title, :creator, :subject, :description, :date, :type, :identifier, :language, :rights, :format]
+
+  def initialize(environment)
+    @environment = environment
+  end
+
+  def settings
+    @settings ||= Noosfero::Plugin::Settings.new(@environment, VirtuosoPlugin)
+  end
+
+  def dspace_client
+    @dspace_client ||= OAI::Client.new("#{settings.dspace_uri}/oai/request")
+  end
+
+  def virtuoso_client
+    @virtuoso_client ||= RDF::Virtuoso::Repository.new("#{settings.virtuoso_uri}/sparql", :update_uri => "#{settings.virtuoso_uri}/sparql-auth", :username => settings.virtuoso_username, :password => settings.virtuoso_password, :auth_method => 'digest', :timeout => 30)
+  end
+
+  def triplify(record)
+    metadata = VirtuosoPlugin::DublinCoreMetadata.new(record.metadata)
+    puts "triplify #{record.header.identifier}"
+
+    DC_CONVERSION.each do |c|
+      values = [metadata.send(c)].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(settings.dspace_uri))
+        virtuoso_client.insert(query)
+      end
+    end
+  end
+
+  def run
+    harvest_time = Time.now.utc
+    params = settings.last_harvest ? {:from => settings.last_harvest.utc} : {}
+    puts "starting harvest #{params}"
+    begin
+      records = dspace_client.list_records(params)
+      records.each do |record|
+        triplify(record)
+      end
+    rescue Exception => ex
+      puts ex.to_s
+    end
+    settings.last_harvest = harvest_time
+    settings.save!
+    puts "ending harvest #{harvest_time}"
+  end
+
+  def start
+    if find_job.empty?
+      job = VirtuosoPlugin::DspaceHarvest::Job.new(@environment.id)
+      Delayed::Job.enqueue(job)
+    end
+  end
+
+  def find_job
+    Delayed::Job.where(:handler => "--- !ruby/struct:VirtuosoPlugin::DspaceHarvest::Job\nenvironment_id: #{@environment.id}\n")
+  end
+
+  class Job < Struct.new(:environment_id)
+    def perform
+      environment = Environment.find(environment_id)
+      harvest = VirtuosoPlugin::DspaceHarvest.new(environment)
+      harvest.run
+    end
+  end
+
+end
diff --git a/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb b/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb
new file mode 100644
index 0000000..408a33f
--- /dev/null
+++ b/plugins/virtuoso/lib/virtuoso_plugin/dublin_core_metadata.rb
@@ -0,0 +1,20 @@
+class VirtuosoPlugin::DublinCoreMetadata
+
+  include OAI::XPath
+
+  attr_accessor :date, :title, :creator, :subject, :description, :date, :type, :identifier, :language, :rights, :format
+
+  def initialize(element)
+    @title = xpath(element, './/dc:title')
+    @creator = xpath(element, './/dc:creator')
+    @subject = xpath_all(element, './/dc:subject').map(&:text)
+    @description = xpath(element, './/dc:description')
+    @date = xpath_all(element, './/dc:date').map(&:text)
+    @type = xpath(element, './/dc:type')
+    @identifier = xpath(element, './/dc:identifier')
+    @language = xpath(element, './/dc:language')
+    @rights = xpath_all(element, './/dc:rights').map(&:text)
+    @format = xpath(element, './/dc:format')
+  end
+
+end
diff --git a/plugins/virtuoso/test/functional/virtuoso_plugin_admin_controller_test.rb b/plugins/virtuoso/test/functional/virtuoso_plugin_admin_controller_test.rb
new file mode 100644
index 0000000..e86a04d
--- /dev/null
+++ b/plugins/virtuoso/test/functional/virtuoso_plugin_admin_controller_test.rb
@@ -0,0 +1,38 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class VirtuosoPluginAdminControllerTest < ActionController::TestCase
+
+  def setup
+    @environment = Environment.default
+    @profile = create_user('profile').person
+    login_as(@profile.identifier)
+  end
+
+  attr_reader :environment
+
+  should 'save virtuoso plugin settings' do
+    post :index, :settings => {'virtuoso_uri' => 'http://virtuoso.noosfero.com',
+                               'virtuoso_username' => 'username',
+                               'virtuoso_password' => 'password',
+                               'dspace_uri' => 'http://dspace.noosfero.com'}
+    @settings = Noosfero::Plugin::Settings.new(environment.reload, VirtuosoPlugin)
+    assert_equal 'http://virtuoso.noosfero.com', @settings.settings[:virtuoso_uri]
+    assert_equal 'username', @settings.settings[:virtuoso_username]
+    assert_equal 'password', @settings.settings[:virtuoso_password]
+    assert_equal 'http://dspace.noosfero.com', @settings.settings[:dspace_uri]
+    assert_redirected_to :action => 'index'
+  end
+
+  should 'redirect to index after save' do
+    post :index, :settings => {"virtuoso_uri" => 'http://virtuoso.noosfero.com'}
+    assert_redirected_to :action => 'index'
+  end
+
+  should 'create delayed job to start harvest on force action' do
+    harvest = VirtuosoPlugin::DspaceHarvest.new(environment)
+    assert !harvest.find_job.present?
+    get :force_harvest
+    assert harvest.find_job.present?
+  end
+
+end
diff --git a/plugins/virtuoso/test/test_helper.rb b/plugins/virtuoso/test/test_helper.rb
new file mode 100644
index 0000000..cca1fd3
--- /dev/null
+++ b/plugins/virtuoso/test/test_helper.rb
@@ -0,0 +1 @@
+require File.dirname(__FILE__) + '/../../../test/test_helper'
diff --git a/plugins/virtuoso/test/unit/dspace_harvest_test.rb b/plugins/virtuoso/test/unit/dspace_harvest_test.rb
new file mode 100644
index 0000000..85e7160
--- /dev/null
+++ b/plugins/virtuoso/test/unit/dspace_harvest_test.rb
@@ -0,0 +1,25 @@
+require File.dirname(__FILE__) + '/../test_helper'
+
+class DspaceHarvestTest < ActiveSupport::TestCase
+
+  def setup
+    @environment = Environment.default
+  end
+
+  attr_reader :environment
+
+  should 'create delayed job when start' do
+    harvest = VirtuosoPlugin::DspaceHarvest.new(environment)
+    assert !harvest.find_job.present?
+    harvest.start
+    assert harvest.find_job.present?
+  end
+
+  should 'not duplicate harvest job' do
+    harvest = VirtuosoPlugin::DspaceHarvest.new(environment)
+    assert_difference "harvest.find_job.count", 1 do
+      5.times { harvest.start }
+    end
+  end
+
+end
diff --git a/plugins/virtuoso/views/virtuoso_plugin_admin/index.html.erb b/plugins/virtuoso/views/virtuoso_plugin_admin/index.html.erb
new file mode 100644
index 0000000..ddc86e9
--- /dev/null
+++ b/plugins/virtuoso/views/virtuoso_plugin_admin/index.html.erb
@@ -0,0 +1,34 @@
+<h1><%= _('Virtuoso settings')%></h1>
+
+<%= form_for(:settings) do |f| %>
+
+  <strong>
+    <%= labelled_form_field _('Virtuoso URL:'), f.text_field(:virtuoso_uri) %>
+    <%= labelled_form_field _('Virtuoso Username:'), f.text_field(:virtuoso_username) %>
+    <%= labelled_form_field _('Virtuoso Password:'), f.password_field(:virtuoso_password) %>
+    <%= labelled_form_field _('DSpace URL:'), f.text_field(:dspace_uri) %>
+  </strong>
+
+  <% button_bar do %>
+    <%= submit_button(:save, _('Save'), :cancel => {:controller => 'plugins', :action => 'index'}) %>
+  <% end %>
+
+<% end %>
+
+<hr/>
+<div class="harvest">
+  <% if @settings.last_harvest %>
+  <div class="date">
+    <span class="label"><strong><%= _('Last execution:') %></strong></span>
+    <span class="value"><%= time_ago_as_sentence @settings.last_harvest %></span>
+  </div>
+<% end %>
+  <br/>
+  <div class="actions">
+    <% if @harvest_running %>
+      <%= _('Running...') %>
+    <% else %>
+      <%= button :next, _('Force harvest'), :action => :force_harvest %>
+    <% end %>
+  </div>
+</div>
--
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