bundle:// classpath question

[Mark Struberg]

Hi!

I'm using geronimo-3.0-M1 and try to startup OpenWebBeans EAR+WAR scenario. In 
this case I'm getting the following classpath URL from a 

ClassLoader.getResource("META-INF/beans.xml"): bundle://319.0:9/

Where does this come from? Is this coming from the the OSGi container? 
Where can I find documentation about this?

txs and LieGrue,
strub