A DCS-offline communication framework for the ALICE TRD

The transition radiation detector (TRD) of the CERN-LHC experiment ALICE is designed to provide excellent electron identification, tracking and a level-one trigger on different event signatures. To meet these requirements, the front-end electronics of the TRD performs complex data processing like online reconstruction, particle identification and a fast evaluation of trigger conditions. The detector control system (DCS) is used for operating and monitoring this electronics. For the purpose of data reconstruction and quality assurance the configuration, operation status and various run-specific counters of each TRD module are to be stored in the ALICE offline calibration database. A procedure for the readout of the above data and for the communication between the systems involved has been implemented and is presented. Tools for online and offline data monitoring have been developed and are discussed as well.