[Gmsh] Nurbs support?

[Bill]

I recently downloaded Gmsh and after some experimentation I decided 
to try to implement nurbs.
I am a little overwhelmed with the parser though( states and table 
entries). I see that there are some stubs for nurbs handling and I 
assume they are untested. Is this true?
  Any assistance would be gratefully appreciated (in the form of some 
sort of document describing the parser activity).
Thank you
Bill