text: The fixed-format export code can use the information passed by the 
  
  **HrAddOutlineNode**method to construct a user-navigable outline of the export 
  
  document. From the user's perspective, each node in the outline is represented by some 
  
  title text that maps to a particular location within the document. 
  
  Each call to**HrAddOutlineNode**specifies information for a single node in this outline. 
  
  Each node is identified by a node ID that is unique within the outline. An ID of**0**is 
  
  reserved for the root node. The outline is hierarchical, that is, it has a tree structure in 
  
  which each node has a single parent and zero or more child nodes. 
  
  The first parameter to**HrAddOutlineNode**provides the ID of the node that is the parent 
  
  of the node being passed in. 
  
  Publisher always calls**HrAddOutlineNode**for a parent node before calling the method 
  
  for any of the parent node's children. In other words, the export code is assured of 
  
  already having the node information for the node identified by the*idNodeParent*
  
  parameter. The only exception is the initial call to**HrAddOutlineNode**that specifies the 
  
  root node. For this call, the value of*idNodeParent*is**0**. 