best way to uniquely identify a remote XmlObject?

[Anthony Fryer]

I was wondering if what is the best way to uniquely identify an XmlObject 
within a document on a remote server?  I need something similar in concept to 
the signature of a SchemaType which allows me to use 
SchemaTypeSystem.typeForSignature to retrieve the SchemaType object. 
 
I have up to now been generating the  XPath to the XmlObject to identify it, 
but am realizing that this breaks easily when peer nodes or parent peer nodes 
are deleted or inserted, changing the path to the XmlObject.  
 
Are bookmarks what I should use for this?  Do bookmarks persist if a document 
is reloaded?  Is there some other better way I can do this?
 
Regards,
 
Anthony Fryer
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