The Default Visitor Pattern is a version of the classic Visitor Pattern defined by Martin E. Nordberg in a paper called Variations On The Visitor Pattern. It basically shows how to provide a default implementation or Template Method of a classic Visitor Pattern so that others can easily create derivatives.
Please help describe this useful pattern. I would provide a more detailed explaniation, but I am swamped by work! -- Jimmy Cerra 20050913
See original on c2.com 