XSD 1.1 xs:alternative/xs:assert [英] XSD 1.1 xs:alternative/xs:assert

问题描述

xsd 1.1 可以吗?我想根据类型"切换属性，如果它是A"或B".如何为这个简单的问题编写 XSD 1.1 语法?

Is that possible with xsd 1.1? I want to switch the attributes depending on the "type" if its "A" or "B". How can I write an XSD 1.1 syntax for this simple problem?

  <?xml version="1.0"?>
  <node type="A" a1="asd" a2="d"/>

  <node type="B" b="4" />

推荐答案

是的，您可以根据 type 属性的值使用 <为 node 定义替代类型代码>xs:替代.在这种情况下，您不需要 xs:assert.

Yes, you can define alternative types for node depending on the value of the type attribute using xs:alternative. You don't need xs:assert in this case.

您的示例似乎与规范中的示例非常相似，以至于我不太确定您为什么要问这个问题.例如:

Your example seems so similar to the ones in the spec that I'm not quite sure why you are asking the question. For example:

<xs:element name="message" type="messageType">
  <xs:alternative test="@kind='string'" type="messageTypeString"/>
  <xs:alternative test="@kind='base64'" type="messageTypeBase64"/>
  <xs:alternative test="@kind='binary'" type="messageTypeBase64"/>
  <xs:alternative test="@kind='xml'"    type="messageTypeXML"/>
  <xs:alternative test="@kind='XML'"    type="messageTypeXML"/> 
  <xs:alternative                       type="messageType"/>
</xs:element>

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