Athena Developer Guide

Athena Chapter 18 Framework packages, interfaces and libraries Version/Issue: 2.0.0
Gaudi package
External package
Gaudi Package dependency
External Package dependency
GaudiDb GaudiSvc
(persistency) (services)
GaudiTools
(tools)
Gaudi Framework
GaudiAlg
(algorithms)
GaudiAud
(monitoring)
GaudiExamples
(applications)
HbookCnv
(converters)
Gaudi
RootDb
(persistency)
RootHist
Cnv
(converters)
CLHEP
HTL
Gaudi
Kernel
(foundations)
GaudiPolicy
(configuration)
GaudiSys
CernLib
ROOT
SIPython
(scripting)
ExternalLibs
(configuration)
Python
Figure 18.1 Package structure of the Gaudi software
the software installation at a given site. All the above packages are grouped into the GaudiSys set of
packages which are the minimal set required for a complete Gaudi installation
The remaining packages are optional packages which can be used according to the specific technology
choices for a given application. In this distribution, there are two specific implementations of the
histogram persistency service, based on HBOOK (HbookCnv) and ROOT (RootHistCnv) and one
implementation of the event data persistency service (GaudiRootDb) which understands ROOT
databases. There is also a prototype scripting service (SIPython) depending on the Python scripting
language. Finally, at the top level we find the applications (GaudiExamples) which depend on
GaudiSys and the scripting and persistency services.
18.2.1 Gaudi Package Layout
Figure 18.1 shows the layout for Gaudi packages. Note that the binaries directories are not in CVS, they
are created by CMT when building a package.
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