使用XML Schema进行XML验证

时间:2017-10-28 16:15:09

标签: xml validation xsd schema unique

我正在尝试编写一个XML Schema,它将验证XML文档,如下所示。出于验证目的,我使用的是xs:unique。我正在尝试将树转换为XML。所以从根本上会有很多分支。在一个路径中从根到叶实体名称必须是唯一的。示例路径:

name0>scenarioDec>Entities>entityMultiAsp>Entity2>entitySpec>Entity2

在此路径中Entity2添加了两次。所以不行。我无法解决这个问题。

另一条道路:

name0>scenarioDec>Events>eventMultiAsp>Aircraft>entitySpec>Entity2

这里的Entity2还可以。因为在此路径中之前没有添加Entiy2。

我尝试过使用

<xs:selector xpath=".//entity"/> 

而不是

<xs:selector xpath="*/entity"/>. 

如果我使用.//则检查所有路径。但我只需要一条路径唯一性。

我该如何解决这个问题?

<?xml version="1.0" encoding="UTF-8"?>
<entity xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 

 xsi:noNamespaceSchemaLocation="file:/M:/axm.xsd"
 name="name0">

 <aspect name="scenarioDec">

  <entity name="Environment">
  <!-- for test -->
  </entity>

  <entity name="Entities"> <!-- -->
   <multiAspect name="entityMultiAsp">
    <entity name="Entity2">
     <specialization name="entitySpec">
      <entity name="Aircraft"/>
      <entity name="Entity2"> <!-- it is not ok because in this path already one Entity2 added before.
       name0>scenarioDec>Entities>entityMultiAsp>Entity2>entitySpec>Entity2-->
        <var name="var1"></var>
        <var name="var2"></var>                 
     </entity>
     </specialization>
    </entity>
   </multiAspect>
  </entity>

  <entity name="Events">
   <multiAspect name="eventMultiAsp">
    <entity name="Aircraft"> <!-- it is ok -->
     <specialization name="entitySpec">
      <entity name="Entity2"> <!-- it is ok because in this path no Entity2 is added before 
      name0>scenarioDec>Events>eventMultiAsp>Aircraft>entitySpec>Entity2-->
       <var name="var1"></var>
       <var name="var2"></var>       
      </entity>      
     </specialization>     
    </entity>
   </multiAspect>
  </entity>

 </aspect>

</entity>

上面的XML的XML模式如下:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified"
xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" vc:minVersion="1.1">



<xs:complexType name="aspectType">
    <xs:sequence>
        <xs:element minOccurs="0" maxOccurs="unbounded" ref="entity"/>
    </xs:sequence>
    <xs:attribute name="name" use="required"/>
</xs:complexType>

<xs:complexType name="multiAspectType">
    <xs:sequence>
        <xs:element minOccurs="0" maxOccurs="unbounded" ref="entity"/>
    </xs:sequence>
    <xs:attribute name="name" use="required"/>
</xs:complexType>

<xs:complexType name="specializationType">
    <xs:sequence>
        <xs:element minOccurs="0" maxOccurs="unbounded" ref="entity"/>
    </xs:sequence>
    <xs:attribute name="name" use="required"/>
</xs:complexType>


<xs:complexType name="varType"> <!--  mixed="true" -->
    <xs:sequence>
        <xs:element minOccurs="0" maxOccurs="unbounded" ref="entity"/>
    </xs:sequence>
    <xs:attribute name="name" use="required"/>
</xs:complexType>


<xs:element name="entity">
    <xs:complexType>
        <xs:sequence>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="aspect"/>
                <xs:element ref="specialization"/>
                <xs:element ref="multiAspect"/>
                <xs:element ref="var"/>
            </xs:choice>                
        </xs:sequence>

        <xs:attribute name="name" use="required"/>
<xs:assert test="every $x in .//* satisfies empty($x//*[node-name(.) = node-name($x)])"/>

    </xs:complexType>


</xs:element>

<xs:element name="aspect" type="aspectType"/>
<xs:element name="multiAspect" type="multiAspectType"/>
<xs:element name="specialization" type="specializationType"/>
<xs:element name="var" type="varType"/>   


</xs:schema>

这里我添加了一张图片,以明确这个概念。

enter image description here

........ 编辑2: ........

<xs:element name="entity">
    <xs:complexType>
        <xs:sequence>
            <xs:choice minOccurs="0" maxOccurs="unbounded">
                <xs:element ref="aspect"/>
                <xs:element ref="specialization"/>
                <xs:element ref="multiAspect"/>
                <xs:element ref="var"/>

            </xs:choice>            

        </xs:sequence>

        <xs:attribute name="name" use="required"/>

        <xs:assert test="empty(../@name)"/>

        <!--                
            Your suggestion: 
                <xs:assert test="empty(../Entity2)"/>
            but for my case may be it will be  
            <xs:assert test="empty(../@name)"/>

            as entity name is not fixed. I have tried both the way but it is not working. 
        -->

    </xs:complexType>

-----编辑3 -------

我有四种类型的节点:1。实体,2。MultiAspect,3。Aspect和4.专业化。如果节点是实体,则其后继者是Aspect,MultiAspect或Specialization。如果节点的类型是Aspect,MultiAspect或Specialization,则其子节点的类型为Entity。根节点始终是实体。

我使用上述规则设计了我的XML Schema。我使用“assert”来验证XML文件。我用过

every $x in .//* satisfies empty($x//*[node-name(.) = node-name($x)])

并尝试使用实体而不是*

every $x in .//entity satisfies empty($x//entity[node-name(.) = node- name($x)])

但它一直在显示错误。上面给出了XML Schema。

<?xml version="1.0" encoding="UTF-8"?>
<entity xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="file:/M:/axm.xsd" name="name0">

 <aspect name="scenarioDec">
  <entity name="Environment">
   <multiAspect name="entityMAsp">
    <!-- <entity name="EntityTest"></entity>  --> <!-- if i add "EntityTest" 
as an entity then it shows error but it should be correct -->
   </multiAspect>
  </entity>

 </aspect>


</entity>

当我尝试添加以下行时,在“multiAspect”内部显示错误。

<entity name="EntityTest">

但它应该是正确的。

1 个答案:

答案 0 :(得分:1)

感谢您的额外解释,我想我现在明白您要实现的目标。

我不认为这种约束可以在XSD 1.0中表达。在XSD 1.1中,可以使用断言来完成:

<xs:element name="Entity2">
 ...
 <xsl:assert test="empty(.//Entity2)"/>
</xs:element>