Hi Eliot, My quick test shows that oXygen uses the XML catalogs with Trang. For example I create a new topic, change the system ID on the DOCTYPE to make sure the DTD can be found only through the "public" catalog mapping and converting to XSD shows that the DTD was read through the catalog because the required class attributes that are specified only in the DTD appear in the generated schema. Best Regards, George -- George Cristian Bina <oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger http://www.oxygenxml.com On 1/11/11 1:19 AM, Eliot Kimber wrote:

h Oxygen is not catalog aware, which is a bit annoying when you want to generate XSDs from DITA map and topic types, which are all about the catalogs.