I'm helping a colleague set up an Oxygen environment. For reasons I can't determine, it is failing to resolve any DITA-related DTDs. I did find that the master frameworks catalog did not have a reference to the frameworks/dita/catalog.xml. I added that reference, verified that it was correct and that it eventually got me to the catalog-dita.xml catalog, but even after restarting Oxygen, it is still unable to validate any DITA documents. I compared the various catalog-related settings to my own environment and couldn't see any obvious differences. Any idea what I might have overlooked? It appears that when Oxygen was initially installed DITA was not selected as a framework, but all the DITA-related settings appear to otherwise be in place. Other than the entry in the master catalog, is there some other setting I might have overlooked? Thanks, Eliot -- Eliot Kimber Senior Solutions Architect, RSI Content Solutions "Bringing Strategy, Content, and Technology Together" Main: 512.554.9368 www.rsicms.com www.rsuitecms.com Book: DITA For Practitioners, from XML Press, http://xmlpress.net/publications/dita/practitioners-1/