The itemgroup element can be used to sub-divide or organize elements that occur inside a list item, definition, or parameter definition.
The itemgroup element is particularly useful as a basis for specialization, where it can be used to group content within specialized list items or definitions. For example, in the OASIS task specialization, many elements within the step element are specialized from itemgroup.
See appendix for information about this element in OASIS document type shells.
<li>Second point of a list. <itemgroup>related discourse</itemgroup> </li>