text: The members of the**DocExComment_BeginStructNode**structure are as follows: 
  
  **ident**Specifies the constant value, msodocexsignature, which identifies this EMF 
  
  comment as containing semantic information. 
  
  **iComment**Specifies the MSODOCEXCOMMENT value, 
  
  msodocexcommentBeginStructNode. 
  
  **idNodeParent**Specifies the ID of the parent node. A value of**0**specifies the root 
  
  node. A value of**-1**specifies the currently open structure node, that is, the 
  
  *enclosing*structure node. 
  
  **iSortOrder**Specifies the sort order of the structure node among its sibling nodes. 
  
  The sort order enables the add-in to order the content correctly in the exported 
  
  document. 
  
  No two nodes can have the same sort order. However, the set of integers that 
  
  constitute the sort order do not need to be contiguous. 
  
  A value of**-1**indicates that the sibling order is the same order in which the nodes 
  
  appear in the EMF comments. Note that the order in which the content appears in 
  
  the EMF is not necessarily the order in which the content is consumed by a user of 
  
  the document. 