Talmud (literally, "study") is the generic term for the documents that comment and expand upon the Mishnah (“repeating”), the first work of rabbinic law, published around the year 200 CE by Rabbi Judah the Patriarch in the land of Israel.
Although Talmud is largely about law, it should not be confused with either codes of law or with a commentary on the legal sections of the Torah. Due to its spare and laconic style, the Talmud is studied, not read. The difficulty of the intergenerational text has necessitated and fostered the development of an institutional and communal structure that supported the learning of Talmud and the establishment of special schoolswhere each generation is apprenticed into its study by the previous generation.
In the second century, Rabbi Judah the Patriarch published a document in six primary sections, or orders, dealing with agriculture, sacred times, women and personal status, damages, holy things, and purity laws. By carefully laying out different opinions concerning Jewish law, the Mishnah presents itself more as a case book of law. While the Mishnah preserved the teachings of earlier rabbis, it also shows the signs of a unified editing. Part of that editing process included selecting materials; many of the traditions that did not “make it” into the Mishnah were collected in a companion volume called the Tosefta (appendix, or supplement).