[mudpyr8]

Correct. Examples:

[roll=Hero]5d6[/roll]

Returns (1 STUN/pt, 0 BODY for 1s, 1 BODY for 2-5, 2 BODY for 6):

5 + 1 + 2 + 6 + 6 
STUN = 20
BODY = 6

[roll=HoE]5d6[/roll]

Returns (open ended and pick the highest single result)

5 + 1 + 2 + 10 (6 + 4) + 22  (6 + 6 + 6 + 4) = 22

But

[roll]5d6[/roll]

Returns:

5 + 1 + 2 + 6 + 6 = 20

There are of course limits so someone can't write 100000d10000000.