Reply to: Adding a Logo to DITA OT outputMarch 7, 2013 at 8:27 pm
One easy way to check that a file you have modified is being used is to make a major error such as leaving out a closing tag. The DITA OT will then stop with a fatal error and list the file's name. Once you know a file is actually being used then I would recommend other more standard XSLT debugging methods like putting messages into the FO output and checking the FO output itself.
In XMetaL Author Enterprise 5.0 through 7.0 that deliverable (XMetaL Enhanced PDF via RenderX XEP) uses the files here:
In XMetaL Author Enterprise 8.0 they are here (due to restructuring by the DITA OT project):