This is a draft and may change often.
What is it?!
It is just a way to break current PmWiki limitations regarded to the bidimensionality of current hirerarchical file and group structure.
We can have a different representation and organization of files and groups, using markup/variables to mark a file as belonging to a virtual hierarchical structure.
That Virtual Hierarchy can then be listed, changed and provide a non-limited way to organize files.
How we do it
We use current markup to set the Virtual Path to a file, like this: