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+## New Filter Interface Design ##
+
+An overhaul of the Filter interface is undergoing. This refactoring effort will
+address many problems we faced in the old design. The most important one is to
+remove the requirement to compiler every single Filter users with a Device Compiler.
+This is addressed by removing C++ template (and CRTP) from Filter and is subclasses.
+A new non-templated NewFilter class is added with many old templated public interface
+removed.
+
+This new design also made Filter implementations thread-safe by default. Filter
+implementations are encouraged to take advantage of the new design and removing
+shared metatable states from their `DoExecute`, see Docygen documentation in
+NewFilter.h
+
+Filter implementrations are also re-orgnized into submodules, with each submodile
+in its own `vtkm/filter` subdirectory. User should update their code to include
+the new header files for example, `vtkm/filter/field_transform/GenerateIds.h`and
+link to submoudle library file, for example, `libvtkm_filter_field_transform.so`.
+To maintain backward compatability, old `vtkm/filter/FooFilter.h` header files
+can still be used but will be deprecated in release 2.0.