# File lib/yadis/xrires.rb, line 24
    def query_url(xri, service_type=nil)
      # URI normal form has a leading xri://, but we need to strip
      # that off again for the QXRI.  This is under discussion for
      # XRI Resolution WD 11.
      # 
      qxri = XRI.to_uri_normal(xri)[6..-1]
      hxri = @proxy_url + qxri
      args = {'_xrd_r' => 'application/xrds+xml'}
      if service_type
        args['_xrd_t'] = service_type
      else
        # don't perform service endpoint selection 
        args['_xrd_r'] += ';sep=false'
      end

      return XRI.append_args(hxri, args)
    end