Beginner's question

Imported from previous forum

On the Madrid exchange (not FIX), when we want to do business, we first ask for a "price list", and this then enables us to submit orders. Under FIX is this done by sending/receiving:
1: Indication of Interest, MsgType=6
2: Advertisements, MsgType=7
Or not ?, then how ?

Perhaps somebody could suggest where to find a document which answers beginner’s questions like this.

Faithfully,
Krzysztof Rybicki