The following illustration shows the class hierarchy for the XML Document Object Model (DOM), with the World Wide Web Consortium (W3C) name in parenthesis along with the class name where it is relevant.
XML Document Object Model (DOM) hierarchy
The following classes do not inherit from the XmlNode:
The XmlImplementation class is used to create an XML document. For more information, see XML Document Creation.
The XmlNamedNodeMap class handles an unordered set of nodes. For more information, see Unordered Node Retrieval by Name or Index.
The XmlNodeList class handles an ordered list of nodes. For more information, see Ordered Node Retrieval by Index.
The XmlNodeChangedEventArgs class handles event handlers registered on the XmlDocument. For more information, see Event Handling in an XML Document using the XmlNodeChangedEventArgs.
The XmlLinkedNode class inherits from XmlNode. Its purpose is to override two methods from XmlNode: the PreviousSibling and NextSibling methods. These overridden methods are then inherited and used by XmlCharacterData, XmlDeclaration, XmlDocumentType, XmlElement, XmlEntityReference, and XmlProcessingInstruction, which are classes that have previous and next siblings.