%metric{:href => metric_url(metric.id), :id => metric.id}

-haml_tag(:entity, :<) do
  -haml_concat metric.send(:entity) || metric.send(:id)
%roperties
  -metric.properties.each do |prop|
    -haml_tag(prop.name, :<) do
      - if prop.values
        - prop.values.each do |p|
          %smple
            - p.each do |k, v|
              %roperty{ :name => k, :value => v }