<xsd:element name="extension"> <xsd:complexType mixed="true"> <xsd:sequence> <xsd:any minOccurs="0" maxOccurs="unbounded" processContents="skip" /> </xsd:sequence> <xsd:attribute name="name" type="xsd:NMTOKEN" use="required" /> <xsd:anyAttribute processContents="skip" /> </xsd:complexType> </xsd:element>