schema.org and w3c conflict

We have the following error:

Error Line 278, Column 36: "itemscope" is not a member of a group
specified for any attribute

                    <div itemscope itemtype="schema.org/PostalAddress">

We are trying to adjust our website http://www.insurancefiles.com to
the latest standards of schema.org. Why do we get this error?
Thank you.

--
Slava Rybalka

Received on Friday, 20 January 2012 17:32:01 UTC