The ‘well-defined naming guidelines’ expression is an oxymoron in the context of a standard. This is reinforced in the case of OOXML proposal by the fact that ‘guidance’ parts of the text are explicitly meant to be informative only (as opposed to normative).
Replace ‘guidelines’ with ‘rules’.
page 1, lines 9 Part 2, Section 1. Scope
ed
Proposed Disposition of DIS 29500 Comment DE-0129 (Modified: 2007-11-15) Agreed; the following change will be made to Part 2, §1, page 1, lines 89: Parts have content types and are uniquely identified using the well-defined naming guidelines rules provided in this Open Packaging specification. Similar Comments: DK-0073 , FR-0029 , GB-0051 , PT-0031 , US-0268

dupe of GB 51