...N could be number of edges and M could be number of nodes or something).

...could do two passes. First, read all nodes into a table, which you can index...

...break relationships with consistency requirements across compute-nodes (servers).

Looks interesting, but I don't...

...changing, and all your nodes are flavored as pointing to const nodes.

I see you...

...a generic tree or array container whose nodes
can either be elements or a subtree...

...existing nodes and it keeps mutable lists in the nodes (i.e. making the nodes...

...data structures have their strengths especially when nodes are
part of several containers.
I implemented...

...so:

string getCData(XmlNode[]nodes) {
  if (!nodes.length) return "";
  return nodes[0].getCData();
}

and in...

...DescribeInstances.xml

You can find all parent nodes that provide this set of information with...

...string path)
{
  XmlNode[] nodes = src.parseXPath(path);
  return nodes.length==0 ? null : nodes[0];
}

Then...