Introduction

This document result from the effort lead by the Photon Group at SUBATECH to organize within the PHOS collaboration the software needed for the performance and physics simulation of PHOS and for the reconstruction of the raw data (presently simulated one's and real data in the future).

The PHOS software is a package of AliRoot, the off line project for ALICE. Before doing anything you should carefully read the general AliRoot documentation. The current stable version is V3.03. This is the last version which still includes the old structure. The higher versions (the branch tagged as HEAD in the CVS server) are a major rewriting of the entire package. It has been rewritten to follow the lines defined by the AliRoot project.

Rules

1. The AliRoot offline policy must be followed.
2. SUBATECH represented by Yves Schutz is the librarian of the PHOS contribution to AliRoot.
3. Any modification to the existing software or any new piece of software must be approved by the librarian who is in charge of the updates.
4. Developpers must used CVS to download the official software from the CERN repository.
5. Developpers must comply with the Coding AliRoot coding convention.
6. FORTRAN is a strictly prohibited language.
7. Any new piece of code must be documented along the line: what is the purpose, how is it done, how to use it. You can start any new class from a canevas, available in the PHOS package. A class definition file should be started from canevas.h and a class implementation file should be started from canevas.cxx.

Figure 1.: Use case diagram of the simulation and reconstruction for PHOS (click on image for full size)