A NodeFilter interface represents an object used to filter the nodes in a NodeIterator or TreeWalker. They don't know anything about the DOM or how to traverse nodes; they just know how to evaluate a single node against the provided filter.
The CharacterData abstract interface represents a Node object that contains characters. This is an abstract interface, meaning there aren't any object of type CharacterData: it is implemented by other interfaces, like Text, Comment, or ProcessingInstruction which aren't abstract.
The Comment interface represents textual notations within markup; although it is generally not visually shown, such comments are available to be read in the source view. Comments are represented in HTML and XML as content between '<!--' and '-->'. In XML, the character sequence '--' cannot be used within a comment.
This chapter describes the DOM Event Model. The Event interface itself is described, as well as the interfaces for event registration on nodes in the DOM, and event listeners, and several longer examples that show how the various event interfaces relate to one another.
The W3C's DOM Level 1 Core is a powerful object model for changing the content tree of documents. It is supported in all major browsers including Mozilla Firefox and Microsoft Internet Explorer. It is a powerful base for scripting on the web.
The Text interface represents the textual content of Element or Attr. If an element has no markup within its content, it has a single child implementing Text that contains the element's text. However, if the element contains markup, it is parsed into information items and Text nodes that form its children.