[<% @taxons.each_with_index do |t,i| %>
  { "attr" :
    { "id" : "<%= t.id %>" },
    "data" : "<%= t.name %>"
    <% unless t.children.empty? %>
      ,"state" : "closed"
    <% end %>
  }<%= "," if i < (@taxons.size - 1) %>
<% end %>]