<?xml version="1.0"?> <!DOCTYPE procedure PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"> <procedure><title>An Example Procedure</title><step><para> A Step </para></step><step><para> Another Step </para><substeps><step><para> Substeps can be nested indefinitely deep. </para></step></substeps></step><step><para> A Final Step </para></step></procedure>