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DDG4: The digitization tools of DD4hep
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Simulating the detector response is an essential tool in high energy physics
to analyze the sensitivity of an experiment to the underlying physics.
Such simulation tools require a detailed though convenient detector description as
it is provided by the `DD4hep` toolkit `DDG4` which uses [Geant4](https://geant4.web.cern.ch/)
to simulate the energy response of a given apparatus.
The toolkit implements a modular and flexible approach to simulation activities using `Geant4`.
User defined simulation applications using `DDG4` can easily be configured,
extended using specialized action routines.
The design is strongly driven by easy of use;
developers of detector descriptions and applications using
them should provide minimal information and minimal specific
code to achieve the desired result.
For further details please see the user manual
[HTML](https://dd4hep.web.cern.ch/dd4hep/usermanuals/DDG4Manual/DDG4Manual.html)
[PDF](https://dd4hep.web.cern.ch/dd4hep/usermanuals/DDG4Manual/DDG4Manual.pdf)
