I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments. Summary: this document is ready, perhaps with nits. You might consider reducing the security considerations part, just to increase emphasis on the fact that while the data described by this schema is potentially very privacy-impacting, it is the *protocol(s)* that need to address those issues. Perhaps adding an intro sentence like that to the Sec 15 would be useful. Thanks for the trip down my personal memory line. Haven't deal with XML Schema since WS-star days :) -- Senior Architect, Akamai Technologies IM: richsalz at jabber.at Twitter: RichSalz