Question

我正在尝试使用Eclipse的WTP插件作为我的IDE重新定义简单XML Schema中元素的maxOccurs属性。

文件：widget1.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.example.org/widget"
  elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
  xmlns:tns="http://www.example.org/widget">

  <xsd:complexType name="WidgetType">
    <xsd:sequence>
      <xsd:element name="Name" type="xsd:string"/>
      <xsd:element name="ProductID" type="xsd:unsignedInt"/>
    </xsd:sequence>
  </xsd:complexType>

  <xsd:element name="Widgets">
    <xsd:complexType>
      <xsd:sequence>
        <xsd:element name="Widget" type="tns:WidgetType" minOccurs="1" maxOccurs="65536"/>
      </xsd:sequence>
    </xsd:complexType>
  </xsd:element>

</xsd:schema>

文件：widget2.xsd 在此文件中，我想将maxOccurs的{{1}}属性重新定义为10。

Widget

但是，widget2.xsd上的验证失败，Eclipse报告此错误

<?xml version="1.0" encoding="UTF-8"?> <xsd:schema targetNamespace="http://www.example.org/widget" elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:tns="http://www.example.org/widget"> <xsd:include schemaLocation="widget1.xsd"/> <xsd:redefine schemaLocation="widget1.xsd"> <xsd:complexType name="Widgets"> <xsd:complexContent> <xsd:restriction base="Widgets"> <xsd:sequence> <xsd:element name="tns:Widget" maxOccurs="10"/> </xsd:sequence> </xsd:restriction> </xsd:complexContent> </xsd:complexType> </xsd:redefine> </xsd:schema>

Multiple annotations found at this line:

我尝试将- src-resolve.4.1: Error resolving component 'Widgets'. It was detected that 'Widgets' has no namespace, but components with no target namespace are not referenceable from schema document 'file:///C:/Projects/Test/XMLSchema/Widget/widget2.xsd'. If 'Widgets' is intended to have a namespace, perhaps a prefix needs to be provided. If it is intended that 'Widgets' has no namespace, then an 'import' without a "namespace" attribute should be added to 'file:///C:/Projects/Test/XMLSchema/Widget/widget2.xsd'. - src-redefine.5.b.d: 'restriction' does not have a 'base' attribute that refers to the redefined element, 'http://www.example.org/widget,Widgets'. <complexType> children of <redefine> elements must have <extension> or <restriction> descendants, with 'base' attributes that refer to themselves.中的Widgets替换为<redefine>，希望摆脱命名空间错误，但这也不起作用。

这个错误是什么意思？我正在尝试做什么呢？

Answer 1

好的，经过大量的试验和错误，我成功地把这个想出来了！问题似乎是在widget1.xsd中Widgets元素的类型被创建为匿名本地类型。一旦我将类型分离到它自己的本地WidgetsType，它就解决了问题。如果有人能回答为什么，我会很感激。我正在粘贴修改过的文件，也许它会帮助别人。

文件：widget1.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.example.org/widget"
  elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
  xmlns:tns="http://www.example.org/widget">

  <xsd:complexType name="WidgetType">
    <xsd:sequence>
      <xsd:element name="Name" type="xsd:string"/>
      <xsd:element name="ProductID" type="xsd:unsignedInt"/>
    </xsd:sequence>
  </xsd:complexType>

  <xsd:complexType name="WidgetsType">
    <xsd:sequence>
      <xsd:element name="Widget" type="tns:WidgetType" minOccurs="1" maxOccurs="65536"/>
    </xsd:sequence>
  </xsd:complexType>

  <xsd:element name="Widgets" type="tns:WidgetsType"/>

</xsd:schema>

文件：widget2.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema targetNamespace="http://www.example.org/widget"
  elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
  xmlns:tns="http://www.example.org/widget">

  <xsd:redefine schemaLocation="widget1.xsd">
    <xsd:complexType name="WidgetsType">
      <xsd:complexContent>
        <xsd:restriction base="tns:WidgetsType">
          <xsd:sequence>
            <xsd:element name="Widget" type="tns:WidgetType" maxOccurs="10"/>
          </xsd:sequence>
        </xsd:restriction>
      </xsd:complexContent>
    </xsd:complexType>
  </xsd:redefine>

  <xsd:element name="Widgets" type="tns:WidgetsType" />

</xsd:schema>

Answer 2

首先包含在你的第一篇文章中不允许。重新定义的行为也包括在内。

你必须声明你重新定义的元素中的类型。你不能只是匿名。

Answer 3

您的解决方案有效，因为在原始 widget2.xsd 中尝试redefine元素Widgets＆＃34;，但重新定义只允许您重新定义类型。那是你在解决方案中尝试过的。

XML Schema重定义错误

3 个答案: