+For the package changed command only, the following fields are also available:
+<UL>
+ <LI>$old_pkgnum and $new_pkgnum
+ <LI>$old_pkgpart and $new_pkgpart
+ <LI>$old_agent_pkgid and $new_agent_pkgid
+ <LI>$old_order_date and $new_order_date
+ <LI>$old_start_date and $new_start_date
+ <LI>$old_setup and $new_setup
+ <LI>$old_bill and $new_bill
+ <LI>$old_last_bill and $new_last_bill
+ <LI>$old_susp and $new_susp
+ <LI>$old_adjourn and $new_adjourn
+ <LI>$old_resume and $new_resume
+ <LI>$old_cancel and $new_cancel
+ <LI>$old_unancel and $new_unancel
+ <LI>$old_expire and $new_expire
+ <LI>$old_contract_end and $new_contract_end
+</UL>