RenderX XEP is a commercial grade application written in Java for dynamic rendering of XML documents. XEP is a pluggable architectural component that takes two open standard inputs, XML data and XSL FO stylesheet, and produces the industry's de-facto standards for high-quality rendered electronic documents, Adobe PDF, and Postscript.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.