关于什么是变文、变文的来源和界定等问题，历来众说纷坛。“变文”与“变相”是相辅而行的，是“变相”的说明文。“讲唱”，是“变文”作为一种文体的形式，是中国本上固有的东西。但“变文”不同于“讲经文”、“诗话”、“话本”等其它敦煌讲唱文学写本，不能以“变文”一词笼统称之。 On what is the subject of change, change the source and definition of other issues, has always been numerous public forums. “Variants” and “disguised” are complementary, is “disguised” explanatory text. “Talking and singing” is a form of stylistic change of “variant text” and is inherent in China. However, “Variations” are not the same as other scripts of Dunhuang speech literature, such as “Telling the Scriptures,” “Poetry,” “Scripts,” and so on.