Lorsque l’ordre des livres contrevient à l’ordre des sciences: les repertoires d’Ibn Al-Nadim (XE S.) Et Muḥammad Ibn Al-Akfani (M. 1349)

While the philosophers have thought about the classification of sciences since the 9th century in Islam, the scholars who elaborate the classification of books depend on other categorisation. The comparison between al-Fārābī, Ibn Ḫaldūn on the one hand and Ibn al-Nadīm and Ibn al-Akfānī on the other hand shows the prominence given to the Islamic thouight and the Arab classical literature on the Hellenistic legacy. The unique catalogue of the madrasa preserved reflects the same choice. The practical thematic classifications deviate from the rational epistemology in favour of a subjective or cultural ranking