See references for urls to P2P projects. Website for this Wiley published book. The XMI Framework is a simple Java API for saving and loading XMI files and creating XMI DTDs. It supports XMI version 1.0 and version 1.1. Bug fixes and more customizable comparison functions.
Element comparison works better when sibling nodes have different positions under their parent.
Also, one can specify which attributes to look at when determining matching nodes. For problems or questions regarding this web contact Garry .