Ellipses and anaphora are commonplace in everyday conversation and thus, also in negotiation dialogues. Finding them is one problem, representing them another one. As for the representation there are two principal approaches, one using links (which replace missing data) and inferring the complete object at a later stage and one using instant completion of the data. For anaphora that is replacing the anaphor by the actual reference object and for ellipsis that is adding the missing object(s).