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-<?xml version="1.0" encoding="utf-8"?>
-<!--Arbortext, Inc., 1988-2006, v.4002-->
-<!DOCTYPE concept PUBLIC "-//OASIS//DTD DITA Concept//EN"
- "concept.dtd">
-<concept id="cjarch" xml:lang="en-us">
-<title outputclass="id_title">J2EE architecture</title>
-<shortdesc outputclass="id_shortdesc">The <tm tmclass="special" tmowner="Sun Microsystems, Inc."
-tmtype="tm" trademark="Java">Java</tm> 2 Platform, Enterprise Edition (J2EE)
-provides a standard for developing multitier, enterprise applications.</shortdesc>
-<prolog><metadata>
-<keywords><indexterm>J2EE<indexterm>architecture</indexterm></indexterm><indexterm>Java
-EE</indexterm></keywords>
-</metadata></prolog>
-<conbody outputclass="id_conbody">
-<p outputclass="anchor_topictop"></p>
-<p>The economy and technology of today have intensified the need for faster,
-more efficient, and larger-scale information management solutions. The J2EE
-specification satisfies these challenges by providing a programming model
-that improves development productivity, standardizes the platform for hosting
-enterprise applications, and ensures portability of developed applications
-with an extensive test suite.</p>
-<p>J2EE architecture supports component-based development of multi-tier enterprise
-applications. A J2EE application system typically includes the following tiers:</p>
-<dl><dlentry outputclass="id_projectfiles_top">
-<dt>Client tier</dt>
-<dd>In the client tier, Web components, such as Servlets and JavaServer Pages
-(JSPs), or standalone <tm tmclass="special" tmowner="Sun Microsystems, Inc."
-tmtype="tm" trademark="Java">Java</tm> applications provide a dynamic interface
-to the middle tier.</dd>
-</dlentry><dlentry>
-<dt>Middle tier</dt>
-<dd>In the server tier, or middle tier, enterprise beans and Web Services
-encapsulate reusable, distributable business logic for the application. These
-server-tier components are contained on a J2EE Application Server, which provides
-the platform for these components to perform actions and store data.</dd>
-</dlentry><dlentry>
-<dt>Enterprise data tier</dt>
-<dd>In the data tier, the enterprise's data is stored and persisted, typically
-in a relational database.</dd>
-</dlentry></dl>
-<p>J2EE applications are comprised of components, containers, and services.
-Components are application-level components. Web components, such as Servlets
-and JSPs, provide dynamic responses to requests from a Web page. EJB components
-contain server-side business logic for enterprise applications. Web and EJB
-component containers host services that support Web and EJB modules.</p>
-<p>For more information on J2EE architecture and its implicit technologies,
-download and read the <xref format="html" href="http://java.sun.com/j2ee/download.html#platformspec"
-scope="external">J2EE 1.4 Specification<desc></desc></xref>.</p>
-<p outputclass="anchor_topicbottom"></p>
-</conbody>
-</concept>