Domain Decomposition Method

[Waad Subber]

Hello everyone: 

    I am new to PETSC. Reading the tutorials, I understand that PETSC 
supports domain decomposition with additive Schwartz and iterative 
substructuring (balancing Neumann-Neumann). I am looking for some 
example codes involving these domain decomposition methods for 1D and 
2D  PDE (preferable linear PDE) so that I can get started. Can anyone 
kindly point me to the right place where I can find them.

Thanks :)

waad