code: def tag_structure(tag, site):
      
      return {'tag_id': tag.pk,
              'name': tag.name,
              'count': tag.count,
              'slug': tag.name,
              'html_url': '%s://%s%s' % (
                  PROTOCOL, site.domain,
                  reverse('zinnia:tag_detail', args=[tag.name])),
              'rss_url': '%s://%s%s' % (
                  PROTOCOL, site.domain,
                  reverse('zinnia:tag_feed', args=[tag.name]))
              }
docs: A tag structure.