The following are examples of the keys used with A, B, C, and D data set records:

FIXCDS A HSM.HMIG.T231510.USER.DATA.H4060
FIXCDS A VSAM.PATHNAME
FIXCDS B USER.DATA.NAME
FIXCDS C HSM.BACK.T352016.DATA.NAME.H4323
FIXCDS D USER.DATA.NAME