OSGi bundles and bundle archives

Applications can be deployed as versioned OSGi bundles, with each bundle typically having the granularity of an enterprise application module (for example, a webapplication). A bundle is a Java™ archive (JAR) or web application archive (WAR) file with standard OSGi metadata that describes aspects of the bundle, including the Java packages that the bundle exports, the Java packages that the bundle requires, and the bundle version.