
 
                A DOM-specific 
XMLStructure. The purpose of this class is to
 allow a DOM node to be used to represent extensible content (any elements
 or mixed content) in XML Signature structures.
 
If a sequence of nodes is needed, the node contained in the
 DOMStructure is the first node of the sequence and successive
 nodes can be accessed by invoking Node.getNextSibling().
 
If the owner document of the DOMStructure is different than 
 the target document of an XMLSignature, the   
 XMLSignature.sign(XMLSignContext) method imports the node into the 
 target document before generating the signature.