Here's the page in the authoring kit wiki that describes the Procedure elements:
http://hlkitwiki.wolflair.com/index.php5?title=Procedure_Element_(Data)
(If the link fails to work, edit the address to add a close parentheses - the link autodetect on this forum doesn't include those in auto-detected links, and my manual creation of the link might not work correctly)
You'll need to create it by editing the XML - there's no editor tab for them at this time.