StructuredDocumentTagRangeStart.placeholder property. Gets the [BuildingBlock](../../../aspose.Words.buildingblocks/buildingblock/) containing placeholder text which should be displayed when this structured document tag run contents are empty, the associated mapped XML element is empty as specified via the [StructuredDocumentTagRangeStart.xml_mapping](../xml_mapping/) element or the [StructuredDocumentTagRangeStart.is_showing_placeholder_text](../is_showing_placeholder_text/) element is ``True``.... words . buildingblocks . BuildingBlock...tag. See Also module aspose.words.markup class StructuredDocumentTa...