difference between dvd iso and dvd udf?

hi all

i have nero v6.something and wanted to burn some data onto dvd. nero gives me two choices for this if i'm right:

dvd-rom (iso)
and
dvd-rom (udf)

i've studied both options, maybe i missed something, but i can't see a difference?
anyone knows the diference?
and
what type shpuld i eventually use. i'm completely new to the hole dvd stuff.

thx in advance

 

hi

udf is for film file formats i think?

but use iso for data!

 

http://www.afterdawn.com/glossary/terms/udf.cfm

 

uh now i feel real bad for not having found that site by myself

thanks a lot m8