1 <?xml version="1.0" encoding="ISO-8859-1"?>
2 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
4 <xsd:element name="items">
7 <xsd:element name="item" maxOccurs="unbounded" type="xsd:string"/>
8 <xsd:element ref="items" minOccurs="0" maxOccurs="2"/>
11 <xsd:unique name="ItemUnique">
12 <xsd:selector xpath="item"/>
13 <xsd:field xpath="."/>
17 <xsd:element name="ELEMENTS">
20 <xsd:element name="ELEMENT">
23 <xsd:element ref="items"/>
24 <xsd:element name="ref" type="xsd:string" maxOccurs="unbounded"/>
27 <xsd:keyref name="ItemRef" refer="ItemUnique">
28 <xsd:selector xpath="ref"/>
29 <xsd:field xpath="."/>