code: public static Map<String, String> getCapabilities(HttpServletRequest request, String ddsUrl) throws IOException {
        URL url;
  
        try {
           url = new URL(ddsUrl + "/get_capabilities?capability=resolution_width&capability=model_name&capability=xhtml_support_level&" +
           		"headers=" + URLEncoder.encode(jsonEncode(getHeadersAsHashMap(request)), "UTF-8"));
        } catch (MalformedURLException e) {
           throw new IOException(e);
        }
        
        String httpResponse = fetchHttpResponse(url);
        return jsonDecode(httpResponse, new TypeReference<Map<String, String>>() { });
  
     }
docs: Get the capabilities as a map of capabilities.  There are times that a strict data type is not desirable.
  Getting it as map provides some flexibility.  This does not require any knowledge of what capabilities
  will be returned by the service.
  
  @param request
  @param ddsUrl
  @return
  @throws IOException