If you support code for multiple java application servers, you might eventually encounter a file named:
/webapp/WEB-INF/jboss-web.xml
JBoss uses this file to control the path of the web application, whereas Tomcat generally uses the filename of the WAR itself.
Usually, the contents are pretty sparse, you might consider adding one to your projects should you ever wish to deploy them on JBoss:
<jboss-web>
<context-root>example</context-root>
</jboss-web>
NOTE: There are several other attributes that can find their way into this file for JBoss, notably security configuration, like JAAS.
WARNING: Unfortunately, I’ve tried to add a simple
DOCTYPE jboss-web
and XML preamble to this, file to make it validate, but the server (JBoss 5.1.x) fails to recognize them.