Expression language: Difference between revisions

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{{Short description|Computer language for creating a machine readable representation of ___domain knowledge}}

'''Expression Language''' (EL) is a scripting language to allow access [[Java (Sun)|Java]] components ([[JavaBean]]s) through [[JavaServer Pages|JSP]]. Since [[JavaServer Pages#JSP 2.0|JSP 2.0]], it is used inside [[JavaServer Pages|JSP]] tags to separate Java code from JSP, and to allow easier access to Java components (than in Java codes).

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An '''expression language''' is a [[computer language]] for creating a [[machine readable]] representation of specific [[___domain knowledge]]. Examples include:

==See also==

* [[OGNL]]- An open source expression language used by [[WebWork]] (and [[Struts]] 2.0).

Evolvement of EL occurred to make scripting more easier for web-content designers who have little or practically no knowledge of the core Java Language. This scripting language makes JSP a scripting language in the true sense. Before EL, JSP consisited of some special tags like scriplets, expressions etc within which java code were written explicitly. With EL the web-content designer must only know to make proper calls to the core Java methods and just enjoy the true scripting flavour of a scripting language.

*[[Advanced Boolean Expression Language]], an obsolete hardware description language for hardware descriptions

==External links==

*[[Data Analysis Expressions]] (DAX), an expression language developed by Microsoft and used in Power Pivot, among other places

* [http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSPIntro7.html Java- Expression Language]

*[[Jakarta Expression Language]], a ___domain-specific language used in Jakarta EE web applications. Formerly known as "Unified Expression Language", "Expression Language" or just "the Expression Language").

*[[Rights Expression Language]]s, machine processable language used for representing immaterial rights such as copyright and license information

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