<!DOCTYPE procedure PUBLIC "-//OASIS//DTD DocBook V3.1//EN"> <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>