There are numerous types and categories of Uloom al-Hadeeth. Among the Mutaqaddimeen, Imaam Haakim al-Neesaaboori (rahimahullah) has mentioned 52 types in his book “Ma’rifah Uloom al-Hadeeth”. Ibn as-Salaah in “Muqaddimah Ibn as-Salaah”, Imaam Nawawi in “al-Taqreeb fun Usool al-Hadeeth” and ...