I'll need a bit more information in order to help answer your question. When you say "Can I assume the .rpt is a report output?" ... where are you, or your customer, seeing this .rpt file? All of your documents will have either a .sgm or xml extension based on whether you are using SGML or XML to create your documents. There are many different output formats that Arbortext Editor can support: PDF, HTML, HTML Help, CDROM, Web, XSL, etc. A .rpt file is not something that is typically an output from Arbortext Editor, but this could be a customization by your organization or the customer. This is why I need more information in order to assist you.