On Tue, Feb 28, 2012 at 10:40, Matthew Knepley <[email protected]> wrote:

Right now, DMs wrap up - Domain Topology

- Domain Geometry

These are nowhere in the DM interface.

- Modeling approximation (like function spaces, projectors)

This is only in the DM interface through coarsening and interpolation.

- Modeling equations (including decompositions, variable substitutions)

This is only in the DM interface with collective semantics. (For nonlinear ASM, I would be in favor of getting a subdomain DM which would have collective semantics on the subcommunicator instead of putting "local" evaluation into the public interface.)

and I may have forgotten some stuff. That is a huge amount of crap for one object.

You seem to be confusing the DM interface from a particular way of packing data into an implementation of DM.