Is there a typo in the sender-vouches example of the SAML Token Profile 1.1 (wss-v1.1-spec-os-SAMLTokenProfile.pdf) document?  Section 3.5.2.3 and 3.5.2.4 have XML examples a SAML token using the sender-vouches method.  However, both of these XML examples use "holder-of-key", rather than "sender-vouches", even though they are under the sender-vouches section.

Is this a typo, or is it intentional?

Thank you.