On 04/27/2011 07:32 AM, Francesco Marchioni wrote: Definitely *not*. The lib/ext directory is there to support Java SE/EE style "extensions". If you don't know what those are, don't bother to learn because they're dumb. :-) We only support them for spec-completeness. It's nothing special. We have some deployers which look for Extension-List in deployed JARs, and links them up against the appropriate JAR in here, or in the JDK ext/lib dir, or in other deployed "extensions". Like I said it's a pretty dopey mechanism, especially compared to modules, and we only support it because of the spec; I don't foresee actually recommending anyone use it in real life. -- - DML