<% %> brackets you can of course declare variables:<% now = new Date() %><%=now%>application- The javax.servlet.ServletContext instanceapplicationContextThe Spring ApplicationContext instanceflash- The flash objectgrailsApplication- The GrailsApplication instanceout- The response writer for writing to the output streamparams- The params object for retrieving request parametersrequest- The HttpServletRequest instanceresponse- The HttpServletResponse instancesession- The HttpSession instancewebRequest- The GrailsWebRequest instance