It is not clear how this interacts with the bidi paragraph property and its effect on the ind property (see 2.3.1.12).

While it can reasonably be implied that mirrorindents functions identically for right-to-left and left-to-right documents, the explanatory text should be clear.
Change the second sentence as follows:
"When this element is present, the lead indent shall become the inside indent and the trail indent shall become the outside indent."

"mirrorIndents (Use Left/Right Indents as Inside/Outside Indents)"
, page 94 Section 2.3.1.18

ed

Proposed Disposition of DIS 29500 Comment IL-0001 (Modified: 2008-01-03) Agreed; there was unnecessary ambiguity in the intent of some of these properties. The following changes will be made to ensure the intent is explicit: Part 4, §2.3.1.6, page 51­52, lines 14­15: This element specifies that this paragraph shall be presented using displayed from a right to left direction . This property only affects the following set of paragraph-level properties : ind (§2.3.1.12) jc (§2.3.1.13) tab (§2.3.1.37) textDirection (§2.3.1.41) , and shall not This setting alone does not affect the layout ordering of text within the contents of this paragraph ­ see the rtl element (§2.3.2.28) for a detailed description . Part 4, §2.3.1.13, page 81, the val attribute: Attributes Description val (Alignment Type) Specifies the justification which should be applied to the parent object within a document. The possible values (see below) for this attribute are always specified with left specifying justificiation relative to the leading edge of the paragraph page , and do not therefore change semantic from right-to-left and left-to-right documents. [Example: Consider the following WordprocessingML fragment for a paragraph in a document: <w:pPr> <w:jc w:val="right" /> </w:pPr> This paragraph is now right justified on the page, regardless of the paragraph or section settings. end example] The possible values for this attribute are defined by the ST_Jc simple type Attributes Description (§2.18.50). Part 4, §2.3.1.17, page 87, line 11: This element specifies the border which shall be displayed on the left side of the page around the specified paragraph. This shall not change based on the paragraph direction. Part 4, §2.3.1.28, page 112, line 7: This element specifies the border which shall be displayed on the right side of the page around the specified paragraph. This shall not change based on the paragraph direction. Part 4, §2.3.1.37, page 141, lines 15­16: This element specifies a single custom tab stop within a set of custom tab stops applied as part of a set of customized defined within a set of paragraph properties in a document. A tab stop location shall always be measured relative to the leading edge of the paragraph in which it is used (that is, the left edge for a left-to-right paragraph, and the right edge for a right-to-left paragraph). Similar Comments: ECMA-0075 , IL-0024