During the preparation of the revised English version of La Syntaxe du codex, the authors highlighted the need to reconsider the current notion of ‘content’ from a codicological point of view, in order to complement the more traditional textual and philological perspectives. This contribution offers a first overview of an ongoing reflection on the identification and delimitation of the various types of contents that can be found in a codex including the notions of BlocConts and UniConts. The analysis of contents raises a number of (partially open) questions concerning their interaction, aimed at a better understanding of the structure of the codex, as well as of its genesis and subsequent transformations.