No - This is my simple map:
<?xml version="1.0"?>
<!DOCTYPE map PUBLIC "-//OASIS//DTD DITA Map//EN" "map.dtd">
<!-- Created with XMetaL (
http://www.xmetal.com) -->
<map id="map_FBCD272802344C1A9C99F6CB87DB1B2B"><title>Map_1</title>
<topicref format="dita" href="t_task1.xml" scope="local" navtitle="Task 1" type="task">
</topicref>
<topicref format="dita" href="t_task2.xml" scope="local" navtitle="Task 2" type="task">
</topicref>
<topicref format="dita" href="c_concept1.xml" scope="local" navtitle="concept 1" type="concept">
</topicref>
<topicref format="dita" href="c_concept2.xml" scope="local" navtitle="concept 2" type="concept">
</topicref>
</map>