HasNoParentCategory
Returns true if the current category does not have a parent category.
<mt:Categories>
<mt:HasNoParentCategory>
<$mt:CategoryLabel$> has no parent category.
</mt:HasNoParentCategory>
</mt:Categories>
This type of conditioning can be done with the mt:IfCategory tag as well.
Example
List categories and note if each has a parent or not:
<ul>
<mt:Categories>
<li>
<mt:HasNoParentCategory>
<$mt:CategoryLabel$> has no parent category.
<mt:Else>
<$mt:CategoryLabel$> has a parent category.
</mt:HasNoParentCategory>
</li>
</mt:Categories>
</ul>