robbiehanson/KissXML — pull request #6 by abillingsley (2011-12-08 18:45:12+00:00)
Title: Add subclassing support for arc this time

Because of the architecture and data model of NSXML, when it parses and processes a source of XML it cannot know about your subclass unless you override the class method replacementClassForClass: to return your custom class in place of an NSXML class.