XML : XMLID and XMLIDREF between two xml files

The solution on this post suggests using an XMLAdapter to get around this problem. I've repeated part of the question below for convenience.

  --Network.xml--  <Network>    <Nodes>      <Node id="ROD" />      <Node id="KFI" />      <Node id="JND" />    </Nodes>    <Arcs>      <Arc fromNode="ROD" />      <Arc fromNode="JND" />    </Arcs>  </Network>  ---------    

Using @XmlID and @XmlIDREF annotations, this can be unmarshalled fine.

  --NetworkInputs.xml--  <NetworkInputs>    <Flows>      <Flow toNode="JND" />      <Flow toNode="ROD" />    </Flows>  </NetworkInputs>  ------    

There's no connection between Network and NetworkInputs that allows JAXB to "see" the nodes that exist in Network. I want my Flow objects to point to the correct Node in the Network class.

WHAT I WANT: 1 - I am hoping to find a more general solution, without having to write an adapter for each individual case.

2- Another reason for not writing an adapter is because, I cannot gaurantee that the Network.xml file will be unmarshalled before the NetworkInputs.xml file.