[Bug 2891] Element being valid without satisfying its {type definition}

http://www.w3.org/Bugs/Public/show_bug.cgi?id=2891

           Summary: Element being valid without satisfying its {type
                    definition}
           Product: XML Schema
           Version: 1.0/1.1 both
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Structures: XSD Part 1
        AssignedTo: ht@w3.org
        ReportedBy: sandygao@ca.ibm.com
         QAContact: www-xml-schema-comments@w3.org


Section 3.3.1 has
"An element information item is ·valid· only if it satisfies the {type 
definition}."

This is not correct. An element can be valid if it satisfies an xsi:type that's 
derived from the {type definition} by extension, even if the element doesn't 
satisfy the {type definition} itself.