Include objects:
PageContext: PageContext object
PageScope: Map object, save the key-value in the PAGE
RequestScope: Map object, save the Request within the key-value of Attribute
Sessionscope: Map object, saving the key-value in the session
ApplicationsCope: Map object, saving key-value in Application
Param: Map object, save the key-value of Parameter within Requester
Paramvalues: Map object, save the key-value of Parameter within Requester
HEADER: Map object, saving Key-Value in Header
HeaderValues: Map object, saving key-value in Header
Cookie: Map object, Key-Value, Saves cookie object
Initparam: Map object, save the key-value of parameter within servletcontext
Example:
$ {RequestScope.ProductId}
$ {param.idno}
$ {sessionscope.username}
Operator:
Empty: EMPTY
Non-empty: NOT EMPTY
Big than:>
More than or equal:> =
Equal: ==
Not equal:! =
Small than: <
Less than or equal: <=
Operator:
, -, *, /, mod (mode)
