         if value
           $ 'a', title: value, href: href, value
         else
-          $ 'a', className: 'empty', '<undefined>'
+          $ 'a', className: 'empty', '<none>'

        href: this.context.routes.traces_url(application: application['uuid'])
      $ Field,
        title: 'Origin',
        value: origin_uuid
        href: origin_url
      $ Field,
        title: 'Hostname',
        value: hostname,

    routes: PropTypes.object

  render: ->
    { start, application, origin, hostname } = this.props.trace

    $ 'section', className: 'traceinfo',
      $ Field,
