Does anyone have the full fare rules for the Discovery fare? (Can't see fare rules on Expedia).

What cities is it good from? Can you do open jaws?

I'm getting the following fare quoted:
LHR-ORD-AUS on BA
DFW-LAX-SYD-POM on QF
POM-BNE-LAX-DFW on QF
IAH-LHR on BA

in H-class for just over $3k (eek!!) But for when I'm wanting to go it actually works out cheaper to buy an AUS-LHR R/T then the Discovery fare, than to buy a separate AUS-LHR and AUS-POM. (I'd prefer to end in MAD if possible)