| Class | Description | |
|---|---|---|
 | PdfContentObjectReference | Provides information about content object in structure tree. |
| PdfMarkedContentIdentifier | Represents the marked-content identifier of marked-content sequence. |
| PdfMarkedContentReference | Provides information about marked-content in structure tree of PDF document. |
| PdfStructureCompositeNode | Represents a base class for structure elements and structure tree root. |
| PdfStructureElement | Provides information about structure element of PDF document. |
| PdfStructureElementDictionary | The dictionary that contains pairs: StructureElementIdentifier => PdfStructureElement. |
| PdfStructureTreeNode | Represents a base class for any of structure tree elements. |
| PdfStructureTreeNodeList | Represents the list of PdfStructureTreeNode. |
| PdfStructureTreeRoot | Provides information about a structure tree root of PDF document. |