This element specifies that the nearest ancestor structured document tag shall be of a document part type. <w:sdt> <w:sdtPr> … <w:docPartObj> … </w:docPartObj> </w:sdtPr> … </w:sdt> The docPartObj element in this structured document tag's properties specify that the type of structured document tag is a document part. The child elements must specify the gallery and category semantics for this part, if any. Currently, such elements are skipped on import.