Composite Framework for CMS Applications

We present a composite 1 framework 2 which exploits the advantages of the CMS data model and uses a novel approach for building CMS simulation, reconstruction, testbeam visualisation and future analysis applications.The framework exploits LCG SEAL [1] and CMS COBRA [2] plug-ins and extends the COBRA framework to pass communications between the GUI and event threads, using SEAL callbacks to navigate through the metadata and event data interactively in a distributed environment.We give examples of current applications based on the framework, including CMS test-beams, geometry description debugging, Geant4 [3] simulation, event reconstruction, and the verification of reconstruction and higher level trigger algorithms.