[wss] revised draft clarification

I am having trouble understanding the new paragraph added to section 8 of WSS-Core-03-1103.pdf (in red).
Does the following capture the intended meaning?:

"The creator of an XML Signature on a message payload, message header, or message attachment may 
associate key claims with the signature by using one or more SecurityTokenReferences. 

A token referenced by a SecurityTokenReference may provide information about the key, serving a similar 
function as the XML Digital Signature KeyInfo element.

Such a token may also be used to convey additional information relevant to the signature, serving a similar
function as the XML Digital Signature SignatureProperties element. 

Appropriate use and interpretation of a token referenced by a SecurityTokenReference depends upon
signing and relying party agreement on business and security trust models."

Is this the intent?

Thanks

 Frederick