Hello. In 10.1 it seem to be impossible to override the default catalog settings from the file {oxygenhome}/frameworks/dita/catalog.xml. I have a project specific DTD set that currently uses the default Oasis publicd (for historical reasons) but isn't 100% identical to the ones included with Oxygen. In a normal way I created a project and included my own catalog file, but Oxygen still uses the files included in the framework for validation. I verified the behaviour from the information view where full paths to files are shown during validation. If I rename the file catalog.xml in frameworks/dita to something else and restart Oxygen, my project specific catalog file works as supposed. If I remember correctly, this behavior was different in earlier versions of Oxygen, where my project specific catalog files had priority higher than Oxygen's default files. I hope this behavior can be modified so that the project settings would always allow overriding default settings. Br, Jan -- Jan Nylund Senior System Designer Citec Information Oy Ab