This shows an example helpset map file, where some of the HTML files reside in the topics/topicA subdirectory of the helpset.
<?xml version='1.0' encoding='ISO-8859-1' ?>
<!DOCTYPE map PUBLIC "-//Sun Microsystems Inc.//DTD JavaHelp Map Version 1.0//EN" "http://java.sun.com/products/javahelp/map_1_0.dtd">
<map version="1.0">
<mapID target="mytool_topicA_coolstuff_html" url="topics/topicA/coolstuff.html" />
<mapID target="mytool_topicA_hotstuff_html" url="topics/topicA/hotstuff.html" />
...
</map>