Now that Marty has discovered these two useful nodes, he will need to subscribe to them. This is done rather simply, using the following stanzas:

<iq type='set' id='sub1' 
from='[email protected]/street' 
to='pubsub.hill.valley'> 
  <pubsub xmlns='http://jabber.org/protocol/pubsub'> 
    <subscribe node='storm-updates' jid='[email protected]'/> 
  </pubsub> 
</iq> 
<iq type='set' id='sub2' 
    from='[email protected]/street' 
    to='pubsub.hill.valley'> 
  <pubsub xmlns='http://jabber.org/protocol/pubsub'> 
    <subscribe node='doc-brown-weather-experiment' 
      jid='[email protected]'/> 
  </pubsub> 
</iq> 

The subscription requests come back almost immediately:

<iq type='result' id='sub1' 
from='pubsub.hill.valley' 
to='[email protected]/street'> 
  <pubsub xmlns='http://jabber.org/protocol/pubsub> 
    <subscription...