Users have to categorize their texts on submission. Which is certainly the case in our problem field. In addition to primitives similar to those of gIBIS ZENO offers the opportunity to state preference expressions over previous discussion contributions as a discussion contribution and an evaluation function for discussion contributions and a computational framework to determine, what issue branches of the discussion have been agreed upon and what have been rejected. We note that in both Systems the option to lead meta-discussions on the discussion or the tools itself is mentioned, e.g. for building coalitions. In real world communication environments there have been developing routines to handle complexity based on trust.
Recommendations can be a good starting point for exploring a discussion.
Mandates given from participants to other participants can to represent them in a branch of the discussion. Mandates could also be restricted in duration. The amount of mandates a person has can influence his or her representation. Delegation establishes a relationship between two participants where one delegates his representation in an informally described part of the discussion to the other. We feel insecure judging the effectiveness of those mechanisms in our context.