Reference Design, What should I do with DNI component??

I trying to design a board using the reference design of ALTERA cyclone V, I found many DNI components (resistors and capacitor), what i have to do with this components?, opened circuit?
In the LPDDR2 schematic there are singal CK and CK# (clocks) have a resistor DNI between them, besides in this schematic i saw DQ[0..31] (data port ) have connected the DQ[16..31] connected to ground by resistors DNI?

thanks in advance