AR code types?

What does the AR code type "DC000000 00000000" mean?

I checked the Trainer Toolkit manual and it's unlisted, but I've seen it used in several codes. For example, the in-game name changer Dragonboy made:

94000130 FCFF0000
B21C5C88 00000000
DC000000 000079E0
F21D905E 00000008
D2000000 00000000

DC000000 00000000 = adds an offset to the current offset
for example....
B21C5C88 00000000 sets the offset as the address held at 0x21C5C88
DC000000 000079E0 adds 0x79E0 to that address


this may help: http://doc.kodewerx.org/hacking_nds.html#arcodetypes

Thanks. =]