I have found this information about Structured Document Tags and their MarkupLevels on the forum:
StructuredDocumentTag can occur in a document in the following places:
Inline-level - Among inline content inside, as a child of a Paragraph.
Block-level - Among paragraphs and tables, as a child of a Body,
HeaderFooter, Comment, Footnote or a Shape node.
Row-level - Among rows in a table, as a child of a Table node.
Cell-level - Among cells in a table row, as a child of a Row node.
Nested inside another StructuredDocumentTag.
However, when I try to create Combo Box or Drop Down List at MarkupLevel.ROW, I get this exception:
Can not create such SdtType at this level.
I have two questions:
1. Which MarkupLevels can Combo Box and Drop Down List be at?
2. As a child of which nodes can these two SDTs occur?