This inheritance list is sorted roughly, but not completely, alphabetically:

[detail level 123]

CGBase< GMaterial > [external]
CGMaterial	Material definition belonging to a detector system
CGBase< GMirror > [external]
CGMirror	Optical boundary (surface) definition belonging to a detector system
CGBase< GSystem > [external]
CGSystem	Represents a single detector system (e.g., calorimeter, tracker)
CGBase< GSystemDynamicFactory > [external]
CGSystemDynamicFactory	Optional plugin interface for dynamically-loaded system factories
CGBase< GSystemFactory > [external]
CGSystemFactory	Abstract base class for loading a GSystem from a specific source
CGSystemCADFactory	Load a system from CAD assets (e.g. STL) whose definitions live in the sqlite database
CGSystemGDMLFactory	Placeholder factory for GDML-based systems
CGSystemSQLiteFactory	Load a GSystem from a sqlite database
CGSystemTextFactory	Load a system from ASCII text files
CGBase< GVolume > [external]
CGVolume	Geometry volume record loaded into a GSystem
CGBase< GWorld > [external]
CGWorld	Builds the “world” as a collection of systems, volumes, and post-load modifiers
CGModifier	Describes a post-load modification to a single volume