hmm..sounds like their version of the dpa widecardiod (which is also a modified cardiod)
and is the greatest microphone on the planet
actually, the schoeps mk21 is more like the DPA wide-card.
the DPA 4027 wide-card is at approx. -10dB at 180 degrees
the Schoeps mk21 is at approx. -10dB at 180 degrees
the Schoeps mk22 is at approx. -16dB at 180 degrees
so, all three mics are wide-cardiod (or "sub-cardiod"). as Dsatz has explained, there is no industry wide definition for wide-card or sub-card (and the two terms can be used interchangably). All that it really means is that the polar pattern is somewhere between a cardiod and an omni. In this case, the DPA 4027 and the Schoeps mk21 are both similar in their off-axis rejection, while the new mk22 is more on the cardiod side of things, with higher off-axis rejection compared to the mk21.