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 which allows access to [[Java (Sun)|Java]] components ([[JavaBean]]s) through [[JavaServer Pages|JSP]]. Since [[JavaServer Pages#JSP 2.0|JSP 2.0]], it has been used inside [[JavaServer Pages|JSP]] tags to separate Java code from JSP, and to allow easier access to Java components (than in Java code).

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

Evolution of EL occurred to make scripting 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 consisted of some special tags like scriplets, expressions etc within which java code was written explicitly. With EL the web-content designer needs only to know how to make proper calls to core Java methods and can enjoy the true scripting flavour of a scripting language.

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

==See also==

* [[OGNLData Analysis Expressions]]- An(DAX), open sourcean expression language useddeveloped by [[WebWork]]Microsoft (and [[Struts]]used in Power 2.0).Pivot, among other places

*[[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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==External links==

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

[[Category:ScriptingComputer languages]]

[[fr:Expression Language]]

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