Orach Chayim is a section of Rabbi Jacob ben Asher's compilation of Halakha, Arba'ah Turim. This section addresses aspects of Jewish law pertinent to the Hebrew calendar. Rabbi Yosef Karo modeled the framework of the Shulkhan Arukh, his own compilation of practical Jewish law, after the Arba'ah Turim. Many later commentators used this framework, as well. Thus, Orach Chayim in common usage may refer to another area of halakha, separate from Rabbi Jacob ben Asher's compilation.