Hi all, I am cleaning up DITA files created with FrameMaker. FrameMaker has added a lot of unnecessary attributes, for example. Among others, FM has added an *xmlns:ditaarch* attribute to every top-level dita element such as concept, task or reference. Example: <concept id="id187JBI00EHS" xml:lang="en-US" *xmlns:ditaarch="http://dita.oasis-open.org/architecture/2005/"*> Can I safely remove this attribute or is it required? Regards, Frank -- *Frank Dissinger* Documentation Manager .................................................................... *CGS Publishing Technologies International GmbH* *Email *frank.dissinger@cgs-oris.com | *Web* www.cgs-oris.com <http://www.cgs-oris.com/> *Address* Kettelerstr. 24 | D-63512 Hainburg | Germany *Phone* +49 6182 9626-27 | *Fax* +49 6182 9626-99 *Commercial register* Offenbach, HRB no. 21495 *Managing directors* Bernd Rückert, Christoph Thommessen https://www.cgs-oris.com/Signatur.png <https://www.cgs-oris.com/signatur>