《大唐开元礼》是复原唐令所依据的最基本的文献之一。当它的记载与其他文献存在差异时，首先应当综核《开元礼》的不同版本，由此确定这一记载本身是否存在讹误或缺省；其次则需考虑《开元礼》所载制度并非仅限于开元七年的立法，还融入了开元二十年成书之前的新制，而且《开元礼》的《序例》与五礼仪注对于新制的吸收并不同步，同书的两个部分之间存在矛盾性的记载。此外，开元七年至二十年间颁布的新制也没有全部体现在《开元礼》中，即使是标有“永为常式”等字样的新制也可能随时被废止。这些都为此前的唐令复原成果带来了若干不确定性。

Authentication of the Historical Data for Restoring the Tang Decree: Focusing on The Kaiyuan Rites of Tang

Zhao Jing

The Kaiyuan Rites of Tang is one of the most fundamental documents for restoring the decree of the Tang Dynasty. When the records in it differs from other document, firstly, we should comprehensively examine different versions of The Kaiyuan Rites to ascertain whether there is error or default in the record. Secondly, we should take into account that the systems recorded in The Kaiyuan Rites were not limited to the legislation in the seventh year of the Kaiyuan reign (719 A.D.), but also included new system before it was completed in 732 A.D. And the absorption of new system by “Preface on Principle” and “Annotations of the Five Rites” in The Kaiyuan Rites were out of step, so there exist contradictory records between the two parts. Moreover, the new system promulgated during 719 to 732 A.D. were not reflected entirely in The Kaiyuan Rites, and even the new system with the mark of “Permanent Routine” might be abolished at any time. Those all bring uncertainty to the former achievements on restoring the Tang decree.