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<a accesskey="3" href="page.php?w=Hierarchical_task_network&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=artificial_intelligence">artificial intelligence</a>, <b>hierarchical task network (HTN) planning</b> is an approach to <a href="page.php?w=automated_planning">automated planning</a> in which the dependency among actions can be given in the form of hierarchically structured networks.</p>

<p>Planning problems are specified in the hierarchical task network approach byproviding a set of tasks, which can be:</p>

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# primitive (initial state) tasks, which roughly correspond to the actions of <a href="page.php?w=Stanford_Research_Institute_Problem_Solver">STRIPS</a>;<br/></p><p>
<a accesskey="3" href="page.php?w=Hierarchical_task_network&amp;p=2">3.Next</a>
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