Al-mawqūf (literally, halted) consists of the sayings and actions of the Companions, may Allāh be pleased with them.
Al-mursal is an omission from the end of the isnād, after the tābiʿī; one of the four kinds of rejected report rooted in a break in the chain.
Al-marfūʿ (literally, that which is raised) is what is attributed to the Messenger of Allāh ﷺ.
How the muḥaddithūn, fuqahāʾ and uṣūliyyūn differ in their working definitions of ḥadīth, and why those differences track back to their respective objectives.
