"Continuous discharge rate" is arbitrary and variable, calculated by dividing a cell's capacity in Ah by the hours it takes to deplete it. CDR, as you say, is whatever current load that is put on a cell, which can be literally anything, 0.2A, 0.5A, 1A, 3A, etc. The attachment you posted used "nominal discharge current," which is not a standard term. What marketing meant (I assumed) and what matters, because it tells us the amp rating of the cell, is known as maximum continuous discharge current. But it is possible, I suppose, that "nominal discharge current" is the current the manufacturer used to calculate the advertised capacity (which would indeed be CDR in that case). The smaller the current, the larger the capacity, so it is a trick used by a lot of cell labels to claim high capacity when, in fact, at the currents used by flashlights, that published capacity is a gross exaggeration if not outright deception.