Prince is a batch formatter for converting XML to printable PDF and PostScript by applying cascading style sheets. It prints any XML document with special support for XHTML and SVG, which can both be used in combination with other XML languages.
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.