  RefDB is the CMS Monte Carlo Reference Database. It is used for recording and
managing all details of physics simulation, reconstruction and analysis
requests, for coordinating task assignments to world-wide distributed Regional
Centers, Grid-enabled or not, and trace their progress rate. RefDB is also the
central database that the workflow-planner contacts in order to get task
instructions. It is automatically and asynchronously updated with book-keeping
run summaries. Finally it is the end-user interface to data catalogues.
