1)Possible question no.1 ?

Since this is a thorough overhaul of the previous version, a list of changes has been provided instead of a diff. This document is a Working Draft, and it is still very incomplete. In fact, many of its sections have not been added in. Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.

2)Possible question no.2 ?

Since this is a thorough overhaul of the previous version, a list of changes has been provided instead of a diff. This document is a Working Draft, and it is still very incomplete. In fact, many of its sections have not been added in. Publication as a Working Draft does not imply endorsement by the W3C Membership. This is a draft document and may be updated, replaced or obsoleted by other documents at any time. It is inappropriate to cite this document as other than work in progress.