HasSubCategories
Within a category context, this tag returns true if the current category has a sub-category.
Example
<mt:IfArchiveType type="Category">
<mt:CategoryLabel>
<mt:HasSubCategories>
Subcategories:
<mt:SubCategories glue=", ">
<mt:CategoryLabel>
</mt:SubCategories>
</mt:HasSubCategories>
</mt:IfArchiveType>