| dls:document-extract-part | 
	    This function extracts an XML element from an existing document and creates a new document from the extracted element. | 
	  
	  
	    | dls:link-expand | 
	    This function performs a single level expansion of a single XInclude reference. | 
	  
	  
	    | dls:link-references | 
	    This function returns a list of all the distinct URIs of documents referenced (either directly or indirectly) in the expansion of the node. | 
	  
	  
	    | dls:node-expand | 
	    This function recursively examines the node for XInclude references and expands them, following the rules of the XInclude specification. |