_ul_ do
  _li do
    _ 'HTTP'
    _ul do
      _li! { _a 'RFC 2616', href: 'http://tools.ietf.org/html/rfc2616' }
      _li! { _a 'httpbis', href: 'http://www.ietf.org/html.charters/httpbis-charter.html' }
      _li do
        _ 'URI'
        _ul do
          _li! { _a 'RFC 3986', href: 'http://tools.ietf.org/html/rfc3986' }
          _li! { _a 'URI Template', href: 'http://bitworking.org/projects/URI-Templates/' }
        end
      end
    end
  end
  _li do
    _ 'HTML'
    _ul do
      _li! { _a 'Working Group', href: 'http://www.w3.org/html/wg/' }
      _li! { _a 'WHATWG', href: 'http://www.whatwg.org/' }
      _li do
        _ 'Specs'
        _ul do
          _li! { _a 'HTML 4.01', href: 'http://www.w3.org/TR/REC-html40/' }
          _li! { _a 'XHTML 1.0', href: 'http://www.w3.org/TR/xhtml1/' }
        end
      end
      _li do
        _ 'Drafts'
        _ul do
          _li! { _a 'HTML 5', href: 'http://www.w3.org/html/wg/html5/' }
          _li! { _a 'Markup Language', href: 'http://www.w3.org/html/wg/markup-spec/' }
          _li! { _a 'Web Workers', href: 'http://dev.w3.org/html5/offline-webapps/' }
          _li! { _a 'HTML Author', href: 'http://dev.w3.org/html5/html-author/' }
          _li! { _a 'RDFa', href: 'http://dev.w3.org/html5/rdfa/Overview.html#rdfa' }
          _li! { _a 'Publication Notes', href: 'http://dev.w3.org/html5/pubnotes/' }
          _li! { _a 'HTML4 Differences', href: 'http://dev.w3.org/html5/html4-differences/' }
          _li! { _a 'Offline Web Applications', href: 'http://dev.w3.org/html5/offline-webapps/' }
          _li! { _a 'Design Principles', href: 'http://dev.w3.org/html5/html-design-principles/' }
          _li! { _a 'Web Forms 2.0', href: 'http://dev.w3.org/html5/web-forms-2/' }
        end
      end
    end
  end
  _li do
    _ 'Atom'
    _ul do
      _li! { _a 'Format', href: 'http://www.atomenabled.org/developers/syndication/atom-format-spec.php' }
      _li! { _a 'Protocol', href: 'http://www.atomenabled.org/developers/protocol/atom-protocol-spec.php' }
      _li do
        _ 'Extensions'
        _ul do
          _li! { _a 'Threading', href: 'http://tools.ietf.org/html/rfc4685' }
          _li! { _a 'Paging and Archiving', href: 'http://tools.ietf.org/html/rfc5005' }
          _li! { _a 'License', href: 'http://tools.ietf.org/html/rfc4946' }
        end
      end
    end
  end
end
