# File lib/nanoc/helpers/blogging.rb, line 358
    def atom_tag_for(item)
      hostname, base_dir = %r{^.+?://([^/]+)(.*)$}.match(@site.config[:base_url])[1..2]

      formatted_date = attribute_to_time(item[:created_at]).to_iso8601_date

      'tag:' + hostname + ',' + formatted_date + ':' + base_dir + (item.path || item.identifier)
    end