I want to understand whats different between this addressing pattern in jsf .
for example I have this xhtml structure :
<h:panelGroup id="parent">
<h:panelGroup id="child">
<!--
and some other components .
-->
</h:panelGroup>
</h:panelGroup>
What is diff between this updates ?
update="parent child"
update="parent:child"
update="parent,child"