Geant4 Persistency working group

The Geant4 persistency working group is responsible for the development and maintenance of different persistency mechanism for the Geant4 geometry classes as well as event information classes such as hits, particles, etc.
The Working Group is currently composed by:

Gabriele Cosmo, CERN (coordinator)

Pedro Arce Dubois, CIEMAT (ASCII module)

Tatiana Nikitina, IN2P3 Saclay (GDML module)

Witold Pokorski, CERN (GDML module, MC-truth)

Work plans

[ 2007 ] [ 2008 ] [ 2009 ] [ 2010 ]

GDML
Geometry Description Markup Language is an XML-based language dedicated to detector geometry description. GDML binding for Geant4 allows reading GDML information into Geant4, as well as writing out GDML files from the Geant4 geometry.

GDML home page

ASCII, text-format Detector Persistency
Geometry Description persistency based on a plain text description, according to a well defined syntax for identifying the different geometrical entities (solids, volumes, materials and volume attributes) with associated parameters.

ASCII User Manual

Geant4 Object Persistency
The goal of the Geant4 Object Persistency work package is to provide the interface for the Root I/O machinery. Such an interface would allow saving all the geometry information from a Geant4 application into the Root binary file. The file could then be reused in different applications.

Demonstrated with extended examples in the Geant4 distribution

HepMC Interfaces
The HepMC interface provides a way of storing the Monte Carlo Truth information coming from a Geant4 simulation, using the HepMC event record.

Available as extended example in the Geant4 distribution