An omission from the end of the isnād, after the tābiʿī, is al-mursal.
The rejected report falls into two kinds: that rejected because of an omission in the isnād, and that rejected because of criticism of the narrator.
Al-Shāfiʿī accepts the mursal under three conditions; some Shāfiʿīs treat the third as one of the four corroborating supports, leaving two conditions.
An omission from the start of the isnād by the compiler's action — this is al-muʿallaq.
Al-maqṭūʿ (literally, severed) consists of the sayings and actions of the tābiʿūn and those after them.
