Maps with Topic Hierarchy

A map with a topic hierarchy contains topics with a parent or child relationship.

Tip: Topic hierarchies may be harder to reuse than map hierarchies. Map hierarchies can be easily added to new maps, while topic hierarchies have to be rebuilt each time.

Example

CODE 
<map id="_m_user_guide" title="User Guide"> 	
	<topicref href="introduction.dita"> 	
		<topicref href="features.dita"/> 
	</topicref>
	<topicref href="safety.dita"/> 
	...
</map>