xsd unique constraint is Invalid

Question

xsd 스키마에서 고유 요소를 사용하는 방법을 보여주는 많은 예제를 보았지만 성공하지 못했습니다. http://www.freeformatter.com/xml-validator-xsd.html으로 테스트 한 오류 (테스트를위한 더 나은 도구를 알고있는 경우) : "스키마의 콘텐츠가 잘못되었습니다."고유 한 요소가 잘못되었거나 잘못 배치되었거나 너무 자주 발생합니다. "

XSD :

<xsd:schema xmlns:inf="http://www.example.net/inflation" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:instrument="http://www.example.net/Instrument" targetNamespace="http://www.example.net/inflation" elementFormDefault="qualified" attributeFormDefault="qualified"> 
    <xsd:import namespace="http://www.example.net/Instrument" schemaLocation="instrument.xsd"/> 
    <xsd:element name="inflations" type="inf:Inflations"/> 
    <xsd:complexType name="Inflations"> 
     <xsd:sequence> 
      <xsd:element name="historyTable" type="xsd:string" default="INFLATION_HISTORY"/> 
      <xsd:element name="inflationHistory" type="inf:InflationHistory" minOccurs="0" maxOccurs="unbounded"/> 
     </xsd:sequence> 
    </xsd:complexType> 
    <xsd:complexType name="InflationHistory"> 
     <xsd:sequence> 
      <xsd:element name="identifier" type="integer"/> 
      <xsd:element name="inflation" type="inf:Inflation" minOccurs="0" maxOccurs="unbounded"/> 
     </xsd:sequence> 
    </xsd:complexType> 


    <!-- Uniqueness --> 
    <xsd:unique name="CodeUniqueKey"> 
    <xsd:selector xpath="inf:inflationHistory" /> 
    <xsd:field xpath="inf:identifier" /> 
    </xsd:unique> 
</xsd:schema> 

Answer 1

고유 제한 조건이 있으므로, 요소 선언의 내부 가고 있습니다

<xsd:element name="inflations" type="inf:Inflations> 
    <xsd:unique name="CodeUniqueKey"> 
    ... 
    </xsd:unique> 
</xsd:element>