| NetworkedPlanet | TMCore Web Services Guide | 
This element contains the description of a single hierarchical ordering of topics. The hierarchy is represented as a nested set of lists of nodes, each node consists of a reference to the topic that is at that position in the hierarchy followed by a list of the child nodes. The element has the following syntax:
<tmh:nodelist>
  <tmh:node>
    <tmh:topic tref="OID" displayname="NAME" />
    <tmh:children>
      <tmh:node> ... </tmh:node>
    </tmh:children>
  </tmh:node>
</tmh:tree>tmh:nodelist/tmh:nodeContains the specification of a single node in the hierarchy. This element is REQUIRED and REPEATABLE.
tmh:nodelist/tmh:node/tmh:topicA reference to the topic that occupies this node in the hierarchy. This element is REQUIRED.
tmh:nodelist/tmh:node/tmh:topic/@trefThe unique object identifier of the topic that occupies this node in the hierarchy. This attribute is REQUIRED.
tmh:nodelist/tmh:node/tmh:topic/@displaynameA display label for the topic that occupies this node in the hierarchy. This attribute is OPTIONAL.
tmh:nodelist/tmh:node/tmh:childrenA list of the child nodes of this node in the hierarchy. This element is OPTIONAL.
tmh:nodelist/tmh:node/tmh:children/tmh:nodeContains the specification of a single node in the
              hierarchy. This element is REQUIRED and REPEATABLE and has the
              same structure as the tmh:nodelist/tmh:node
              element.