Great question—this is one of those nuanced Office Open XML (OOXML) details that trips up many developers working directly with the format. Let’s break this down clearly:

First, let’s clarify what w:pPr/w:rPr actually does: it defines the default character formatting for the entire paragraph. This is not "useless"—it’s designed to act as a fallback style for any w:r (run) in the paragraph that does not have its own explicit w:rPr tag.

Common Reasons It Might Seem Unused (And How It Actually Works) #

• Your test run might have inherited higher-priority formatting: If your paragraph is linked to a paragraph style (like the default Normal style) that already defines character formatting, that style’s settings will take precedence over the w:pPr/w:rPr values. OOXML uses a strict priority hierarchy for formatting:

  1. Explicit w:rPr on a run
  2. w:pPr/w:rPr (paragraph-level default character formatting)
  3. Character formatting defined in the paragraph’s assigned style
  4. Document-wide default character formatting

• An empty w:rPr tag counts as explicit formatting: If your "style-less" run has an empty <w:rPr/> tag (even with no properties set), OOXML treats this as the run explicitly opting out of inheriting paragraph-level defaults. That’s why you wouldn’t see the w:pPr/w:rPr styles applied here.

• You’re testing with conflicting properties: For example, if your w:pPr/w:rPr sets w:b="true" but your run inherits a style that sets w:b="false", the style’s setting will override the paragraph-level default.

When w:pPr/w:rPr Is Actually Useful #

This tag shines when you want to apply consistent character formatting to an entire paragraph without repeating the same w:rPr on every individual run. For example:

• If you want every run in a paragraph to be 14pt and italic, you can define those properties once in w:pPr/w:rPr instead of adding <w:sz w:val="28"/> and <w:i/> to every w:rPr in the paragraph.
• It’s also handy for resetting formatting for runs that don’t need custom styles, ensuring they align with the paragraph’s base character appearance.

A Quick Fix for Your Test Case #

If you want your final style-less run to pick up the w:pPr/w:rPr settings, make sure:

1. The run has no w:rPr tag at all (not even an empty one)
2. The paragraph isn’t using a style that overrides the character properties you’ve set in w:pPr/w:rPr

Give that a try, and you should see the paragraph-level default styles apply to that run!

内容的提问来源于stack exchange，提问作者J. Doe