|  | <?xml version="1.0" encoding="UTF-8"?> | 
|  | <xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'> | 
|  | <xs:include schemaLocation="a.xsd"/> | 
|  | <xs:element name="personnel"> | 
|  | <xs:complexType> | 
|  | <xs:sequence> | 
|  | <xs:element ref="person" minOccurs='1' maxOccurs='unbounded'/> | 
|  | </xs:sequence> | 
|  | </xs:complexType> | 
|  |  | 
|  | <xs:unique name="unique1"> | 
|  | <xs:selector xpath="person"/> | 
|  | <xs:field xpath="name/given"/> | 
|  | <xs:field xpath="name/family"/> | 
|  | </xs:unique> | 
|  | <xs:key name='empid'> | 
|  | <xs:selector xpath="person"/> | 
|  | <xs:field xpath="@id"/> | 
|  | </xs:key> | 
|  | <xs:keyref name="keyref1" refer='empid'> | 
|  | <xs:selector xpath="person"/> | 
|  | <xs:field xpath="link/@manager"/> | 
|  | </xs:keyref> | 
|  |  | 
|  | </xs:element> | 
|  |  | 
|  | <xs:element name="person"> | 
|  | <xs:complexType> | 
|  | <xs:sequence> | 
|  | <xs:element ref="name"/> | 
|  | <xs:element ref="email" minOccurs='0' maxOccurs='unbounded'/> | 
|  | <xs:element ref="url"   minOccurs='0' maxOccurs='unbounded'/> | 
|  | <xs:element ref="link"  minOccurs='0' maxOccurs='1'/> | 
|  | </xs:sequence> | 
|  | <xs:attribute name="id"  type="xs:ID" use='required'/> | 
|  | <xs:attribute name="note" type="xs:string"/> | 
|  | <xs:attribute name="contr" default="false"> | 
|  | <xs:simpleType> | 
|  | <xs:restriction base = "xs:string"> | 
|  | <xs:enumeration value="true"/> | 
|  | <xs:enumeration value="false"/> | 
|  | </xs:restriction> | 
|  | </xs:simpleType> | 
|  | </xs:attribute> | 
|  | <xs:attribute name="salary" type="xs:integer"/> | 
|  | </xs:complexType> | 
|  | </xs:element> | 
|  |  | 
|  | <xs:element name="name"> | 
|  | <xs:complexType> | 
|  | <xs:all> | 
|  | <xs:element ref="family"/> | 
|  | <xs:element ref="given"/> | 
|  | </xs:all> | 
|  | </xs:complexType> | 
|  | </xs:element> | 
|  |  | 
|  | <xs:element name="family" type='xs:string'/> | 
|  |  | 
|  | <xs:element name="given" type='xs:string'/> | 
|  |  | 
|  | <xs:element name="email" type='xs:string'/> | 
|  |  | 
|  | <xs:element name="url"> | 
|  | <xs:complexType> | 
|  | <xs:attribute name="href" type="xs:string" default="http://"/> | 
|  | </xs:complexType> | 
|  | </xs:element> | 
|  |  | 
|  | <xs:element name="link"> | 
|  | <xs:complexType> | 
|  | <xs:attribute name="manager" type="xs:IDREF"/> | 
|  | <xs:attribute name="subordinates" type="xs:IDREFS"/> | 
|  | </xs:complexType> | 
|  | </xs:element> | 
|  |  | 
|  | <xs:notation name='gif' public='-//APP/Photoshop/4.0' system='photoshop.exe'/> | 
|  |  | 
|  | </xs:schema> |