Safe DOCX posture
w:tblBorders table border collection
Declared table borders emit as a w:tblBorders collection whose edges
appear in the CT_TblBorders sequence (top, left, bottom, right, insideH,
insideV) with explicit size/space/color on every edge.
Schema declarations
Bounded evidence
No bounded source, test, or formal-evidence path is attached to this section entry. That absence is preserved rather than inferred away.