0.8.1: What are Web Archive (WAR) files?

A Web Archive (WAR) file is a Java archive file used to store one or more of the following:

Its standard file extension is .war. WAR files are used to package Web modules. A Web module can represent a stand-alone Web application, or it can be combined with other modules (for example, EJB modules) to form a J2EE application. The J2EE application can then be installed and run in a WebSphere application server.