. The headers used in basic patterns are:
</p><ul><li> __channel__: Reply queue (client/server)
</li><li> __job__: The requested <em>job</em> (client/server, pusher/worker and registry)
</li><li> __type__: Request type (registry)
</li><li> __job-type__: Type of job (registry)
</li><li> __queue__: Queue to register (registry)
</li><li> __hb__: Heartbeat specification (registry)
</li><li> __sc__: Status Code (registry) 
</li></ul></div></div><div id="synopsis"><p id="control.syn" class="caption expander" oncl