what does ex, dx, etc. mean?

Just as the topic asks. I'm assuming dx means dpfi. Am I right? Thanks.

Oz

hf is the mpfi fuel economy car 1.5L 8 valve 62 hp
dx is the dpfi 1.5L 16v 92 hp
si is the mpfi 1.6L 16v 108hp

hf is the mpfi fuel economy car 1.5L 8 valve 62 hp
dx is the dpfi 1.5L 16v 92 hp
si is the mpfi 1.6L 16v 108hp

Ok, thanks. So what would the sohc zc be considered? Is it a 1.6 liter? Thanks again.

Oz

sohc zc = jdm version of the d16a6!