XML and Erlang: Think different ! XML is not just about tagged serialized data XML is also about tree and hierarchical data The developper does not have to handle XML-formatted data in his programs. In our project, the XML formalism is used for inputs and outputs, based on Ulf Wiger's XMErl: XMErl is fast and reliable It works for us on thousands of XML files XMerl is doing a really great job for us XML can be directly used as a tree data structure to avoid multiple parsing cost XML can be stored in a database like Mnesia to fasten processing and search