StructuredDocumentTagRangeStart.placeholder_name property. Gets or sets Name of the [BuildingBlock](../../../aspose.words.buildingblocks/buildingblock/) containing placeholder text....STRUCTURED_DOCUMENT_TAG_RANGE_START , True )[ 0 ] . as_structured_docu...STRUCTURED_DOCUMENT_TAG_RANGE_END , True )[ 0 ] . as_structured_document_tag_range_end...