Reply to: PDF Output for constrained DTD’sSeptember 26, 2013 at 4:49 pm
You need to use the DITA OT's own catalog system to help it find the DTDs. It has two catalog files, one is a template and one is generated based on the template. Pretty sure you need to modify the template copy. Some people also find it easier to put a copy of their own DTD files into the DITA OT location so that it is easier to set up the paths, but I don't think that is necessary as long as all of the references resolve.