The aim of this paper is to present the multi-linear approach being developed among the ProDiGE research group at the Institut de Phonétique of the Laboratoire Parole & Langage (Université de Provence) in Aix-en-Provence. We first introduce the conceptual bases of this approach, before focusing our attention on the prosodic levels which constitute one of the lines in our formal and functional representation. In the last part, we present a sample analysis grid of part of our spontaneous speech corpus, detailing each level in turn.