“衍义”是一种解释行为,是指对文本及其意义的扩展、发挥,使之流传久远。所谓“衍义体”,就是以真德秀《大学衍义》诠释体例作为典范的经典诠释方式。《大学衍义》开创了一种遵循“确立纲目,先经后史,诸子议论,自己按语”的原则和次序的经典诠释体例,它遵从“以义求经”的诠释 “Yan Yi” is an interpretation of behavior, refers to the expansion of the text and its meaning, to play, so that the spread of long-term. The so-called “Daoist body” is based on the true moral show “University Danyi” interpretation of the body as a model of the classic interpretation. The “Undertakings of the University” pioneered a classic interpretation of the principle and order of “establishing the outline, first passing through the history, following the philosophies of the philosophers, and lending one’s own words”, and complied with the interpretation of “seeking righteousness through the righteousness”