Expression Language (EL)

The Lumis supports the use of EL (Expression Language), thus facilitating the implementation of douidefinition.xml.

Attributes and text contents of elements in douidefinition can have EL, and are processed during a request, except if the element douiDefinition has the attribute isElIgnored= "true".

The pattern that identifies an EL is "${}".

The definition file as a whole has the resources of the Doui scope defined in Available Resources in EL. The controls, in turn, have the resources of the Controls scope.

Examples of how to use expressions, variables, implicit objects, operators, and reserved words of EL can be found at http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSPIntro7.html.