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Problem currently need to implement dirichlet and neumann functions and we have the corresponding boundary conditions dirichlet and neumann. However we use neumann much more general than in there original meaning I believe. For example Robin/Cauchy boundary conditions can be realized in the neumann function.

Essentially neumann corresponds to the integrand of all boundary integrals in the equations. It's always a weakly enforced boundary condition. dirichlet corresponds to setting a fixed value and is strongly or weakly enforced depending on the discretization scheme.

Alternative naming schemes could be

• boundaryFluxes (for neumann) and BC type flux
• boundaryValues (for dirichlet) and BC type value/fixed

or only changing neumann

• boundaryFluxes (for neumann) and BC type flux
• dirichlet and BC type dirichlet

Other ideas and opinions?