Typical and atypical manuscripts
Beside codex types, which encompass clearly identifiable connected manuscripts, quite a large group of manuscripts exist which, because of the diversity of their composition, could better be referred to as a-typical codex formations. This does not necessarily imply that no vision lay at the basis of the composition, but that a greater variation was allowed / enjoyed, which is in fact quite characteristic of handwritten documents, in comparison with printed editions. More detailed research is required to gain better insight into the choices behind the composition of a-typical manuscripts. Only then is it possible to determine whether codices with a largely mixed content were formed without any organisational vision.