"we study each part intensively in order to detect the detailed argumentation"
Osborne, G. R. (2006). The hermeneutical spiral : A comprehensive introduction to biblical interpretation (Rev. and expanded, 2nd ed.) (40). Downers Grove, Ill.: InterVarsity Press.
Reading this reminded me how nice it would be to have an argument diagramer in the product. Not only does it apply directly to some Bible studies, it also is a fatastic apologetics and homilitic tool. Follow the tutorial at http://rationale.austhink.com/rationale2.0/tutorials/ to see what I mean. And, yes, other conventions would be acceptable.