One of the limitations of PersistentResourceXMLParser preventing its use within the clustering subsystems is the lack of the ability to group child resources. For example, the JGroups subsystem's root resource contains 2 attributes and 2 child resources, where child resources are logically grouped within an attribute groups. The JGroups subsystem in one such example:

<channels default="...">
    <channel name="..." stack="..."/>
    <channel name="..."/>
</channels>
<stacks default="...">
    <stack name="..."/>
    <stack name="..."/>
</stacks>

Here, we need the ability to group specific children within the element of an attribute group.