eMMC physical interface connections

I’m currently working on designing a new board with a Cyclone V HPS. I would like to use a 16GB eMMC device for storage of the application code, as well as the FPGA configuration. I am looking at two devices right now, but they appear the have an extra “DS” (Data Strobe) pin. As I compare this to one of the demo boards I have this pin is not present.

The chips I’m considering are MTFC16GAKAENA-4M IT and EMMC16G-W525-X01U.

My question is: what should I do with this pin? I have looked in the data sheets and other documents online and can’t seem to find an explanation of this newly added pin to the eMMC standard.