What DACs are "reclocking"?

Are there many, many reclocking DACs, or is this particular feature limited to just a few makes and models? Also, how can one tell if a DAC is of the reclocking variety? If the description says something about a low-jitter clock, is that enough, or is that something else entirely? (Yes, I did search the archives -- and Google -- before posting this question.)
Thanks very much.
-- Howard