Question webMethods JMS Capabilities


I am looking to understand the JMS capabilities provided by WebMethods. From their white papers it seems that WebMethods enterprise can act as a JMS client as well as a provider.

Unlike Tibco/MQ which claim to make any native message accessible via JMS, WebM seems to require that messages be explicitly published to a JMS queue using their JMS adapter. Can anyone help me in understanding this. I am looking to develop a JMS adapter to link Webmethods messages to other applications that can act as JMS clients, for a project.