1  <?xml version="1.0"?>
 2  <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
 3    <xs:complexType name="length1">
 4      <xs:simpleContent>
 5        <xs:extension base="xs:nonNegativeInteger">
 6          <xs:attribute name="unit" type="xs:NMTOKEN"/>
 7        </xs:extension>
 8      </xs:simpleContent>
 9    </xs:complexType>
10    <xs:element name="width" type="length1"/>
11  </xs:schema>