THe JBI spec talks about implicit and explicit endpoints and the selction process.  So when a service or interface name is specified in the ME, implicit is used.  When there is more than one "service" available, the spec states that an implementation is free to select the service as it chooses.  This all makes sense.

How are multiple instances of the same services "discovered" for selection for use by the NMR in clustered  and non-clutered mode?