I'm trying to create a set of modular documents using XInclude to assemble them (using a custom XSD). During editing, it is vital that IDREFs resolve to an ID value to ensure data integrity. To make that easier, I want Content Completion to work when inserting an attribute value of type IDREF. I have followed the directions in Oxygen Help to set this up. I am able to validate each module individually and the master file, regardless of where the id values reside, showing that the ID values are available during the validation step. But I cannot get the Content Completion to work for the IDREFs. When I enter an attribute of type IDREF and hit Ctrl-Space, there is no list, not even ID values from the current module. Details: Oxygen 14.2 Text mode Custom xsd schema using xs:ID and xs:IDREF attribute types. Enabled Master File Support for the project. Project set up with top-level file listed under Master Files in the Project view. Validation scenario created and assigned to all files has its "URL of the file to validate" set to the Master file. What's missing that allows the IDs be validated but the Content Completion fail to work? Bob Stayton Sagehill Enterprises bobs@sagehill.net