Consider the following example: 

instance doc fragment: 

     <person>
          <salary xsi:type='xs:integer'>Hello<salary>
     <person>

schema fragment: 

    <xs:element name="person">
     <xs:complexType>
      <xs:sequence>
          <xs:any processContents="skip" maxOccurs='unbounded'/>
      <xs:sequence>
     <xs:complexType>
    <xs:element>

The element "salary" matches the wildcard with processContents of skip within 
the content model of "person". However, the element in the instance has an 
xsi:type specified. The question is: should a processor attempt to 
validate "salary" against the integer type? Schema Validity Assessment 
(Element) [1] would seem to indicate "yes" because clause 1.2 appears to be 
satisfied (via 1.2.1.2). Is this correct? If not, what did I miss? If so, was 
this the intention? 

[1] http://www.w3.org/TR/xmlschema-1/#cvc-assess-elt 

See: http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2002Nov/0281.html