9F5B

Data Storage Data Object List is the card's own tag-and-length request list, in the same request-list family as the PDOL and CDOLs already covered throughout this dictionary, specifically for what data the kernel must pass in GENERATE AC to support Kernel 2's data-storage feature - it only appears once the card has recognised the Data Storage Requested Operator ID (9F5C, covered alongside it here) as one it participates in. Related to CDOL1 (8C, covered earlier) as a parallel mechanism operating alongside it in the same GENERATE AC step, 9F5B extends what the terminal supplies specifically for the data-storage exchange, layered on top of the ordinary cryptogram-request data CDOL1 already defines. A terminal implementation that handles CDOL1 correctly but doesn't also honour 9F5B when present will complete a technically valid cryptogram exchange while silently failing to participate in whatever data-storage program the card was expecting, which surfaces as a missing feature rather than a transaction error. See EMV Contactless Book C-2.