As de Groot had argued for southern Fujian, Schipper distinguished two separate ritual traditions. On the one hand, the Daoist priests (daoshi ) of the Orthodox Unity (Zhengyi
) line—the Celestial Masters who claimed descent from Zhang Daoling, the progenitor of their ritual lineage—use the Chinese texts of the Daoist Canon (daozang
). On the other hand, another class of ritual specialist used texts of a “vernacular” tradition.
As Schipper points out, in order to perform orthodox Daoist ritual, it is necessary to be able to read classical Chinese:
Thus, for Schipper, one of the defining features of the Daoist priest is his literacy in Chinese, and his ritual use of Chinese texts, which he explains are always in manuscript form, and are not only meant to be read but also have a place in the ritual as objects of great symbolic power.
In contrast to the orthodox traditions of the Daoist priests, Schipper— following de Groot—distinguished a separate class of specialist known