is-registry/etc/pushFactory.xml

<ServiceGroupRegistrationParameters
   xmlns:sgc="http://mds.globus.org/servicegroup/client"
   xmlns:xsd="http://www.w3.org/2001/XMLSchema"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/03/addressing"
   xmlns:agg="http://mds.globus.org/aggregator/types"
   xmlns="http://mds.globus.org/servicegroup/client">

   <RefreshIntervalSecs>20</RefreshIntervalSecs>

<Content xsi:type="agg:AggregatorContent" xmlns:agg="http://mds.globus.org/aggregator/types">
      <agg:AggregatorConfig xsi:type="agg:AggregatorConfig">
	 <agg:AggregatorSubscriptionType>
	   <agg:TopicExpression wsnt:Dialect="http://docs.oasis-open.org/wsn/2004/06/TopicExpression/Simple"
		xmlns:wsnt="http://docs.oasis-open.org/wsn/2004/06/wsn-WS-BaseNotification-1.2-draft-01.xsd"
		xmlns:wssgtopic="http://diligentproject.org/namespaces/informationservice/disregistry/DISRegistryFactoryService">
		wssgtopic:ExternalRunningInstance
	  </agg:TopicExpression>
	 </agg:AggregatorSubscriptionType>
      </agg:AggregatorConfig>
      <agg:AggregatorData/>
   </Content>
</ServiceGroupRegistrationParameters>