The present paper aims to contribute to the discussion about a) the complementary information in an edited text, namely sources, parallel or similar passages, or the later use of texts and text elements, b) the classification of this information and c) its distribution in apparatuses. Using the guidelines of the Association Guillaume Budé, the Union Académique Internationale and the Association Internationale des Études Byzantines, it raises the question of conformity among editors and points up the need for consistency, at least as regards terminology and the treatment of clear cases.