I have two files, one with a topic and one with definitions: * TOPIC* <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "Topic.dtd"> <topic id="CREF_TOPIC"> <title>Topic with crossref</title> <body> <p>The best thing since sliced bread is <ph conref="cfs.dita#cfs/mpm"/>.</p> </body> </topic> *DEFINITIONS* <?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Composite//EN" "Topic.dtd"> <topic id="cfs"> <title>Cross References</title> <body> <p> <ph id="mpm">My Payment Method</ph> </p> <p> <ph id="stx">SuperTransactions</ph> </p> </body> </topic> If I set this up & view in Oxygen 10.2, the first tile (TOPIC) displays the cref values just fine. When I run any of the default transforms in Oxygen (to PDF, HTML, etc.), the cref value is blank. I'm not getting an error in the transform - says it transformed fine. But cref isn't working. Clues on how to debug this? The cref is a major component of my documentation plans - I want to have pre-defined values that I can use in documentation so I don't need to update product names, release dates, and so on, inside the final documents.