I am a new Nektar++ user. I want to use the Advection-Diffusion-Reaction Solver where Discontinuous Galerkin method is chosen (property "Projection" has the value "Discontinuous") to solve 2D Unsteady Advection equations over a mesh comprised of both triangles and quads.

I have two questions. 

Q1) When TYPE = "MODIFIED"  (in the "EXPANSIONS" node in a xml file), what are the basis functions over a triangle, over a quad used? The user guide v4.2.0, Section 3.2 addresses this part only generally.

Q2) The approximate solution is a linear combination of basis functions. How can one export the coefficients of the linear combination to an output file? I opened a file *.fld, those coefficients seem to be written inside the node <"ELEMENTS FIELDS="u"...> but the output coefficients are in some kind of encrypted format. 

Are there any documents that I can find answers to the two questions? Of course, I appreciate very much if someone can answer those questions via this mailing list. 

Thank you very much in advance, 

Manh Nguyen