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• detector-specific calibrations will access run-dependent constants using detectorType_segmentSerialNumberString, where segmentSerialNumber is either read from the detector hardware by the daq (ideal, like epix) or managed administratively (more difficult)
• algorithm-specific calibrations (e.g. hexanode, "pop" electron image inversion algorithm) will access run-dependent constants using algorithmType_serialNumberString, where both halves of that field are administratively managed.
• this means that multi-segment detectors will need to do multiple database fetches (bad) but that detector segments can be shuffled around without changing the calib database (good)
• calibration constants should not be exposed to ami, but only used internally by the detector interface or the algorithm