"Sefer ha-Halachot" plays a fundamental role in the development of Halakha. Firstly, "the Rif" succeeded in producing a "Digest", which became the object of close study, and led in its turn to the great "Codes" of Maimonides and of Rabbi Joseph Karo. Secondly, it served as one of the "Three Pillars of Halakha", as an authority underpinning both the Arba'ah Turim and the Shulkhan Arukh. Rabbi Nissim of Gerona (the "RaN") compiled a detailed and explicit commentary on this work; In yeshivot "the Rif and the RaN" are regularly studied as part of the daily Talmudic schedule.