Hello, A new version of Xmlm is available. It's a security update. All users are recommended to upgrade. http://erratique.ch/software/xmlm A call to List.map crept into my implementation of namespaces. A maliciously crafted xml file with a very large amount of attributes on a single tag can crash your (native code) program by stack overflow. The fix doesn't affect performance -- a rev and a map makes a t.r. rev_map. Daniel