openvino/docs/Extensibility_UG/model_pass.md

OpenVINO Model Pass

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.. meta:: :description: Learn how to use Model Pass transformation class to take entire ov::Model as input and process it.

:ref:`ov::pass::ModelPass <doxid-classov_1_1pass_1_1_model_pass>``` is used for transformations that take entire :ref:`ov::Model <doxid-classov_1_1_model>``` as an input and process it.

Template for ModelPass transformation class

.. doxygensnippet:: docs/snippets/template_model_transformation.hpp :language: cpp :fragment: [model_pass:template_transformation_hpp]

.. doxygensnippet:: docs/snippets/template_model_transformation.cpp :language: cpp :fragment: [model_pass:template_transformation_cpp]

Using :ref:`ov::pass::ModelPass <doxid-classov_1_1pass_1_1_model_pass>```, you need to override the run_on_modelmethod where you will write the transformation code. Return value istrueif the original model has changed during transformation (new operation was added, or operations replacement was made, or node attributes were changed); otherwise, it isfalse. Also :ref:ov::pass::ModelPass <doxid-classov_1_1pass_1_1_model_pass>``` based transformations can be executed via ``:ref:ov::pass::Manager <doxid-classov_1_1pass_1_1_manager>```.

See Also ########

• :doc:OpenVINO™ Transformations <openvino_docs_transformations>

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