1<?xml version="1.0"?> 2<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> 3 <xs:complexType name="length2"> 4 <xs:complexContent> 5 <xs:restriction base="xs:anyType"> 6 <xs:sequence> 7 <xs:element name="size" type="xs:nonNegativeInteger"/> 8 <xs:element name="unit" type="xs:NMTOKEN"/> 9 </xs:sequence> 10 </xs:restriction> 11 </xs:complexContent> 12 </xs:complexType> 13 <xs:element name="depth" type="length2"/> 14</xs:schema> 15