JSF : Variables for implicit JSF EL objects

OReilly.JavaServer.Faces CHAPTER 6.2.1 Table 6-2. Variables for implicit JSF EL objects
Variable name	Description
requestScope	A collection (a java.util.Map) of all request scope variables
sessionScope	A collection (a java.util.Map) of all session scope variables
applicationScope	A collection (a java.util.Map) of all application scope variables
param	A collection (a java.util.Map) of all request parameter values as a single String value per parameter
paramValues	A collection (a java.util.Map) of all request parameter values as a String array per parameter
header	A collection (a java.util.Map) of all request header values as a single String value per header
headerValues	A collection (a java.util.Map) of all request header values as a String array per header
cookie	A collection (a java.util.Map) of all request cookie values as a single javax.servlet.http.Cookie value per cookie
initParam	A collection (a java.util.Map) of all application initialization parameter values as a single String value per value
facesContext	An instance of the javax.faces.context.FacesContext class, providing access to various JSF context data
view	An instance of the javax.faces.component.UIViewRoot class, providing access to all components in the current view