4.6.5 Format Change
A format change element represents any change in formatting
attributes. The region where the change took place is marked by a change start
and a change end element.
<define name="text-changed-region-content"
combine="choice">
<element
name="text:format-change">
<ref
name="office-change-info"/>
</element>
</define>
Note: A format change element does not contain
the actual changes that took place.