It is not clear if restrictions in 8.1.4 (e.g., Unicode only and no DTDs) apply to only those parts defined in OPC or do they also apply to parts designed by format designers. Can users create a Shift_JIS XML document containing a DTD and incorporate it in a package

If the restrictions do not apply only to those parts defined in OPC, explicitly state that format designers can design parts freely.

Part 2 Clause 8.1.4

ed

Proposed Disposition of DIS 29500 Comment JP-0041 (Modified: 2007-12-07) Agreed; the following change will be made to Part 2, §8.1.4, page 14, line 9: All XML content of the parts defined in this Open Packaging specification shall conform to the following validation rules: