<substep>A <substep> element has the same structure as a
<step>, except that it does not allow lists of choices or sub-steps
within it, in order to prevent unlimited nesting of steps.
See appendix for information about this element in OASIS document type shells.
- topic/li task/substep
See substeps.
The following attributes are available on this element: Universal attribute group (with a narrowed definition of
@importance, given below) and outputclass.
<step> or
<substep> is optional or
required. Output processors might highlight steps
that are optional or required. Allowed values are
"optional", "required", or -dita-use-conref-target.