Represents a section of content in a document.
SectionStructure elements are used to mark abstract blocks of content within the document. Example uses of SectionStructure elements would be to mark a summary that describes the main topic of the document, or to identify titled sections of a document that might include a header followed by paragraphs, lists, figures, and tables.
StoryFragment is the only allowable parent of a SectionStructure.
Initializes a new instance of the SectionStructure class.
Adds a block to the section.