XML 架构中的集合 [英] Collections in XML SChema

问题描述

学习 XML Schema，我希望能够在另一个元素中拥有元素的集合.看起来很简单，但不太确定如何去做.

Learning XML Schema, I want to be able to have collections of elements inside another element. Seems simple enough, not quite sure how to do it though.

这是架构:

 <xs:attributeGroup name="ProcedureMappingFragment">
  <xs:attribute name="ParameterName" type="xs:string" />
  <xs:attribute name="TypeName" type="xs:string" />
  <xs:attribute name="PropertyName" type="xs:string" />

<xs:complexType name="ProcedureMappingSection">
  <xs:sequence>
    <xs:element name="ProcMapping" type="ProcedureMapping" /> 
  </xs:sequence>
</xs:complexType>

<xs:complexType name="ProcedureMapping">
  <xs:attributeGroup id="two" ref="ProcedureMappingFragment" />
    <xs:attribute name="ProcedureName" type="xs:string" />
</xs:complexType>

我正在尝试制作这样的东西:

And I am trying to produce something like such:

<MappingSection xmlns="http://tempuri.org/ServiceMapping.xsd">
  <ProcMapping ParameterName="ParameterName1" TypeName="TypeName1" PropertyName="PropertyName1" ProcedureName="ProcedureName1" />
  <ProcMapping ParameterName="ParameterName1" TypeName="TypeName1" PropertyName="PropertyName1" ProcedureName="ProcedureName1" />
  <ProcMapping ParameterName="ParameterName1" TypeName="TypeName1" PropertyName="PropertyName1" ProcedureName="ProcedureName1" />
  <ProcMapping ParameterName="ParameterName1" TypeName="TypeName1" PropertyName="PropertyName1" ProcedureName="ProcedureName1" />
</MappingSection>

但是它告诉我在 MappingSection 中我只能有一个 ProcMapping.具体来说，它调用了对命名空间 MappingSection 无效的第二个 ProcMapping 元素.

However it is telling me that I can only have one ProcMapping inside MappingSection. Specifically it is calling the 2nd ProcMapping element invalid for namespace MappingSection.

推荐答案

您需要设置 minOccurs 和 maxOccurs.由于它们的默认值为 1，因此只允许使用一个元素.

You need to set the minOccurs and maxOccurs. Since they have a default value of 1, only one element is allowed.

所以我会定义:

<xs:complexType name="ProcedureMappingSection">
   <xs:sequence>
      <xs:element name="ProcMapping" type="ProcedureMapping" maxOccurs="unbounded" /> 
   </xs:sequence>
</xs:complexType>

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