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>
12