com.aspose.words

Example:

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

// Below are two ways to apply a style from the document to a structured document tag.
// 1 -  Apply a style object from the document's style collection:
Style quoteStyle = doc.getStyles().getByStyleIdentifier(StyleIdentifier.QUOTE);
StructuredDocumentTag sdtPlainText = new StructuredDocumentTag(doc, SdtType.PLAIN_TEXT, MarkupLevel.INLINE);
sdtPlainText.setStyle(quoteStyle);

// 2 -  Reference a style in the document by name:
StructuredDocumentTag sdtRichText = new StructuredDocumentTag(doc, SdtType.RICH_TEXT, MarkupLevel.INLINE);
sdtRichText.setStyleName("Quote");

builder.insertNode(sdtPlainText);
builder.insertNode(sdtRichText);

Assert.assertEquals(NodeType.STRUCTURED_DOCUMENT_TAG, sdtPlainText.getNodeType());

NodeCollection tags = doc.getChildNodes(NodeType.STRUCTURED_DOCUMENT_TAG, true);

for (StructuredDocumentTag sdt : (Iterable<StructuredDocumentTag>) tags) {
    Assert.assertEquals(StyleIdentifier.QUOTE, sdt.getStyle().getStyleIdentifier());
    Assert.assertEquals("Quote", sdt.getStyleName());
}