 <OpenGeoSysProjectDiff base_file="sandwich.prj">

   <add sel="/*/processes/process">

     <use_algebraic_bc>true</use_algebraic_bc>

   </add>

   <add sel="/*/processes/process">

     <weighting_factor>1000</weighting_factor>

   </add>

   <add sel="/*/processes/process">

     <linear>true</linear>

   </add>

   <replace sel="/*/time_loop/output/prefix/text()">sandwich_algebraic_bc</replace>

   <replace sel="/*/linear_solvers/linear_solver/eigen/solver_type/text()">CG</replace>

   <replace sel="/*/linear_solvers/linear_solver/eigen/precon_type/text()">DIAGONAL</replace>

 </OpenGeoSysProjectDiff>