Safe DOCX posture
Bookmark start
w:bookmarkStart opens a bookmark range. The matrix records sampled
preservation only; range identity and bookmark semantics are separate gaps.
ECMA-376 edition 5, Part 1 § 17.13.6.2
Bookmark start
Product posture and evidence for this normative section. The ECMA publication is the authority; this page reports only the pinned Safe DOCX projection.