Geant4 User's Guide For Application Developers Geometry

An example of how to import and export a detector description model based on GDML [3] is provided and can be found in examples/extended/gdml. A description on how to describe a geometry in GDML together with an annotated example, is provided in [4]. GDML (Geometry Description Markup Language) [3] is a markup language based on XML and suited for the description of detector geometry models. It allows for easy exchange of geometry data in a "human-readable" XML-based description and structured formatting.

[3]	http://cern.ch/gdml
[4]	http://cern.ch/gdml/g4example.html