[xsd-users] Sending arguments down the Hierarchy

[Wahid]

Hello,
I am using C++/parser in my project. I am working in "type map"s to delegate information/arguments between the parsers.
Here is a scenario that I made it very clear and simple to understand:
(scenario is a bit lengthy but the question is VERY small)

My XML:

<SimMobility_t>
            <GeoSpatial_t>
                      <RoadNetwork_t>
                                           <Links>
                                                 <Link_t>
                                                  ...........

one of my classes: (pertaining to the above <RoadNetwork_t> element)

class RoadNetwork {
               ........
               std::vector<Link*> links;    
              ...........
}

Now a portion of my map file:
.......
 links Link* Link;
 link_t Link Link;
......

After generating skel and pimpl files, I declare a variable for the above class in the generated "RoadNetwork_t_pimpl" class:

class RoadNetwork_t_pimpl: public virtual RoadNetwork_t_pskel
  {
.....
    private:
    RoadNetwork RN;
  };

As you can see RN has a member called "links" which is a vector of "link"s . Right? 
And you agree that the order of call backs is as follows:
SimMobility_t_pimpl:: pre ()
    GeoSpatial_t_pimpl:: pre ()
     RoadNetwork_t_pimpl:: pre ()
                           Links_pimpl::pre()
                              link_t_pimpl::pre()
                              ........
                          Links_pimpl::Link (Link link)
                          ...
...
right? :)

I can almost shoot my question now:
I update RoadNetwork_t_pimpl::RN in RoadNetwork_t_pimpl:: pre ()  referencing to my RoadNetwork singleton:

  void RoadNetwork_t_pimpl::
  pre ()
  {
      RN=..........::GetInstance().getNetwork(); //RN is a vecor of "link"s
  }
and as the "link" information are read in the xml, I would like to create "link" objects in 
link_t_pimpl::pre() .Later, after I updated the object, I would like to push it to RN.
QUESTION is: I don't know how to send RN as a variable from RoadNetwork_t_pimpl  to 
link_t_pimpl.
more explanation: map file allows me to send argument only in
Inside "Links_pimpl::Link(Link link)" which is a few calls after link_t_pimpl::pre() while, I guess, I need the argument at my disposal when the control is calling  "link_t_pimpl::pre()" itself.
Any suggestions please? 
May be i am writing my program in an inefficient way. In that case also help me please.

Many thanks
vahid