Hi Does the DITA-OT provided with oXygen have modifications that support using topics with either .xml or .dita filename extensions in the same build? I am running into a problem with a different DITA-OT where we have imported files and wound up with both extensions in use at the same time. The symptom is that the .dita files are not filtered. That is, the conditions in @product are not respected, resulting in contents for 2 different products included in the output. My simple tests with our oXygen-based builds show that files with both extensions are processed correctly. Can you let me know if you made changes to support mixed extensions, and where the changes are? The version of the DITA-OT I am using is the 1.5.4 version that came with oXygen 13.2. All my very best, Rob -- Rob Echlin, Documentation Systems Architect, Wind River +1.613.270.5796 | Skype: rob.echlin.wr