DocumentException is a nested Exception which may be thrown during the processing of a DOM4J document.

IllegalAddException is thrown when a node is added incorrectly to an Element

InvalidSchemaException is thrown when an invalid XML Schema document is used

InvalidXPathException is thrown when an invalid XPath expression is used to traverse an XML document

XPathException is thrown when an exception occurs while evaluating an XPath expression, usually due to some function throwing an exception.