總括釋尊一代之說教，視如一經，分為序分正宗分流通分三段。華嚴阿含方等般若諸經為序分。無量義經法華經普賢觀經為正宗分。涅槃經為流通分。此日本日蓮上人依傍天台五時教判，主張法華經中心主義之名目也。見觀心本尊鈔四種三段下。
The three sections, divisions, or periods of Buddha's teaching in his life- time, known as 序分, i.e. the 華嚴, 阿含, 方等, and 般若 sūtras; 正宗分, i.e. 無量義, 法華, and 普賢觀sūtras; and 流通分, i.e. the 涅槃經; they are known as introductory, main discourse, and final application. There are other definitions.
一一代三段 劃分釋迦一代之教法為三段，此乃日僧日蓮依天台宗之五時教判，而主張以法華經為佛教之中心教理所立之名目。日蓮將釋迦如來一代之說教視如一經，分為序分（指華嚴、阿含、方等、般若等法華經以前之諸經）、正宗分（指無量義經、法華經、普賢觀經等法華三部經）、流通分（指涅槃經）三段。p42