<a metal:define-macro="portal_logo"
   id="portal-logo"
   class="brand"
   title="Home"
   accesskey="1"
   tal:attributes="href view/navigation_root_url;
                   title view/navigation_root_title | nothing"
   i18n:domain="plone"
   i18n:attributes="title">
  <img src="logo.png" alt=""
       tal:attributes="alt view/logo_title;
                       width view/logo_width;
                       height view/logo_height;
                       title view/logo_title;
                       src view/img_src" />
</a>
