Intro to CMSSW: Glossary

The CMS SoftWare (CMSSW) is the software used by the CMS experiment for acquiring, producing, processing and analyzing its data.

CMSSW is built in a modular fashion around a main Framework.

CMSSW is needed to decode data formats like AOD and miniAOD

A CMSSW area is not really installed but set up.

cmsRun is the CMSSW executable. There are also utilitarian scripts.

You can compile CMSSW with scram b

An EDAnalyzer is a an edm class that generates a template for any analysis code using CMSSW.

There are essentially three important files in an EDAnalyzer package, the source code in c++, the python config file and a Buildfile for tracking dependencies.

The C++ source code file of an EDAnalyzer is taylored for particle physics analysis under the CMSSW Framework.

This source file needs to be modified according to the analyzer needs

The Python implementation of the configuration of CMSSW is fundamentally modular.

The CMSSW configuration allows for the usage of already available code and/or make changes to yours without having to recompile.