Besides a theory that says the Teiki indicated only a specific book of Ancient Japanese Literature, there is a theory that says the Teiki indicated not only a specific book but also the whole books which record the tradition of the genealogy of the Imperial Family
帝紀とは上記の特定の書物だけを指すとする説の他に、特定の書物だけを指すのではなく天皇家の系譜の伝承を記した書物全般を帝紀と呼ぶとする説