Action represents some default action which should occur when a rule matches a node in the XSLT processing model.

Attribute defines an XML attribute.

Branch interface defines the common behaviour for Nodes which can contain child nodes (content) such as XML elements and documents.

CDATA defines an XML CDATA section.

CharacterData is a marker interface for character based nodes such as the CDATA,Comment and Text nodes.

Comment defines the behavior of an XML comment.

Document defines an XML Document.

DocumentType defines an XML DOCTYPE declaration.

Element interface defines an XML element.

ElementHandler interface defines a handler of Element objects.

Entity defines an XML entity.

Node defines the polymorphic behavior for all XML nodes in a dom4j tree.

NodeFilter defines the behavior for a filter or predicate which acts on a DOM4J Node.

Pattern defines the behaviour for pattern in the XSLT processing model.

ProcessingInstruction defines an XML processing instruction.

SingletonStrategy is an interface used to provide common factory access for the same object based on an implementation strategy for singleton.

Text defines an XML Text node.

Visitor is used to implement the Visitor pattern in DOM4J.

XPath represents an XPath expression after it has been parsed from a String.