XSD 验证错误：cos-all-limited.1.2：“所有”模型组必须出现在粒子中

Question

我有 XSD，它在模式生成过程中出现以下错误。

    org.xml.sax.SAXParseException; systemId: file:/D:/Basil/Projects/myproducts.xsd; lineNumber: 577; columnNumber: 50; cos-all-limited.1.2: An 'all' model group must appear in a particle with '{'min occurs'}' = '{'max occurs'}' = 1, and that particle must be part of a pair which constitutes the '{'content type'}' of a complex type definition.
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:198)
    at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
    at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:437)
    at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaErr(XSDHandler.java:4124)
    at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaError(XSDHandler.java:4107)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:588)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:555)
    at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:521)
    at com.sun.org.apache.xerces.internal.jaxp.validation.XMLSchemaFactory.newSchema(XMLSchemaFactory.java:240)
    at com.sun.tools.xjc.reader.xmlschema.parser.SchemaConstraintChecker.check(SchemaConstraintChecker.java:101)
    at com.sun.tools.xjc.ModelLoader.loadXMLSchema(ModelLoader.java:357)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:167)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:113)
    at com.sun.tools.xjc.Driver.run(Driver.java:313)
    at org.codehaus.mojo.jaxb2.AbstractXjcMojo.execute(AbstractXjcMojo.java:298)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)

下面粘贴了相关的XSD。我无法理解实际的错误是什么。错误在最后的第三行。请帮忙。

<xs:group name="prodVar">
  <xs:all>
     <xs:element name="prodVar" minOccurs="0" maxOccurs="1">
        <xs:complexType>
           <xs:sequence>
              <xs:element name="varName" type="xs:string" minOccurs="0" maxOccurs="unbounded" />
              <xs:element ref="skuList" />
              <xs:element name="vStory" type="xs:string" minOccurs="0" />
              <xs:element ref="attList" />
           </xs:sequence>
        </xs:complexType>
     </xs:element>
     <xs:element name="colorSwatchList" minOccurs="0" maxOccurs="1">
        <xs:complexType>
           <xs:sequence minOccurs="1" maxOccurs="unbounded">
              <xs:element name="colorSwatch" minOccurs="0" maxOccurs="unbounded">
                 <xs:complexType>
                    <xs:sequence>
                       <xs:element name="swatchName" type="xs:string" minOccurs="0" />
                       <xs:element name="swatchHeight" type="xs:string" minOccurs="0" />
                       <xs:element name="swatchWidth" type="xs:string" minOccurs="0" />
                       <xs:element name="colorName" type="xs:string" minOccurs="0" />
                       <xs:element name="mainImageHeight" type="xs:string" minOccurs="0" />
                       <xs:element name="mainImageWidth" type="xs:string" minOccurs="0" />
                       <xs:element name="mainImageName" type="xs:string" minOccurs="0" />
                    </xs:sequence>
                 </xs:complexType>
              </xs:element>
           </xs:sequence>
        </xs:complexType>
     </xs:element>
  </xs:all>
</xs:group>

<!--lot of other stuff -->

<xs:element name="prodVarList" minOccurs="0" maxOccurs="1">
    <xs:complexType> <!-- ERROR HERE -->
        <xs:group ref="prodVar" minOccurs="0" maxOccurs="unbounded" />
    </xs:complexType>
</xs:element>

Answer 1

刚刚摆脱的maxOccurs="unbounded"中<xs:group ref="prodVar" minOccurs="0" maxOccurs="unbounded" />

在 XSD 1.0 中， anxs:all不能重复（这里间接地，有些人可能会说“不错的尝试！”），也不能在 下有任何粒子xs:all，也不能嵌套在任何其他合成器下。