[wss] Order of elements

[Jerry Schwarz <jerry.schwarz@oracle.com>]

I have a question about the ordering rule, namely "As elements are added to 
the <wsse:Security> header block, they should be prepended to the existing 
elements."

This suggests to me that if I want to include a signed security token, I 
would first add the token and then prepend a <ds:Signature/> 
element.  However all examples show the opposite order with the security 
token above the signature.   What have I misunderstood? What is the 
implication if subsequent processing wants to add another signature for the 
same security token?