Has the DFM 5.2 API doc been released for zExplore?
It has not been released yet.
when can we expect these API to be released?
ZEDI (Zexplore) now has APIs for DFM 5.2 and and 6.0. Please download the latest NMSDK 5.2 from http://support.netapp.com/NOW/cgi-bin/software.