Know what you (your organisation) want from the negotiation, know what the main and essential things are and what things are desirable. Also know what may be part of the negotiation that is secondary to requirements.
The parent node(s) for this knowledge are.
The child or prerequisite node(s) for this knowledge are.
Parent nodes show knowledge which can only be known fully by a human expert if they also understand this item of knowledge.
Child or prerequisite knowledge is knowledge which a human expert must already understand if they know this knowledge fully.