XML Publisher is a reporting platform for Oracle Fusion Applications that allows business users to create reports without technical assistance. It uses XML data sources, templates, and an engine to generate reports. The process involves creating an application engine to supply sample data and schemas, developing an RTF template, defining the data source and report in PeopleSoft, updating the application engine for full data, and running it to output reports. Advanced features include bursting, content libraries, and translations. While it provides a flexible single toolset, some XML/XSL knowledge is needed for complex reports and Excel output is basic.