Question

假设我有以下XML，我应该如何更新我的XSD架构（也在下面描述）以防止它的验证？

基本上，对于问题＃3，它看起来像是一个选择题，因为标签中只有一个答案。但是标签内部必须至少有一个标签，否则没有其他问题可供选择但是正确的。

<?xml version="1.0" encoding="utf-8" ?>
<quiz>
  <question><!-- single choice question -->
    <text>Question 1</text>
    <answers>
      <answer>Answer 1</answer>
      <answer>Answer 2</answer>
      <answer>Answer 4</answer>
      <correct>
        <answer>Answer 3</answer>
      </correct>
    </answers>
  </question>
  <question><!-- multiple choice question -->
    <text>Question 2</text>
    <answers>
      <answer>Answer 1</answer>
      <answer>Answer 3</answer>
      <correct>
        <answer>Answer 2</answer>
        <answer>Answer 4</answer>
      </correct>
    </answers>
  </question>
  <question><!-- doesn't make sense. help me prevent this validation -->
    <text>Question 3</text>
    <answers>
      <correct>
        <answer>Some answer</answer>
      </correct>
    </answers>
  </question>
  <question><!-- all answers are correct -->
    <text>Question 4</text>
    <answers>
      <correct>
        <answer>Answer 1</answer>
        <answer>Answer 2</answer>
        <answer>Answer 3</answer>
        <answer>Answer 4</answer>
      </correct>
    </answers>
  </question>
</quiz>

这是XSD：

<?xml version="1.0" encoding="utf-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified"
 xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="quiz">
    <xs:complexType>
      <xs:sequence>
        <xs:element maxOccurs="unbounded" name="question">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="text" type="xs:string" />
              <xs:element name="answers">
                <xs:complexType>
                  <xs:sequence>
                    <xs:element minOccurs="0" maxOccurs="unbounded" 
                     name="answer" type="xs:string" />
                    <xs:element name="correct" minOccurs="1" maxOccurs="1">
                      <xs:complexType>
                        <xs:sequence>
                          <xs:element maxOccurs="unbounded" name="answer"
                           type="xs:string" />
                        </xs:sequence>
                      </xs:complexType>
                    </xs:element>
                  </xs:sequence>
                </xs:complexType>
              </xs:element>
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:sequence>
    </xs:complexType>
  </xs:element>
</xs:schema>

Answer 1

answer元素（\question\answers\answer）的定义应该有minOccurs = 1.你最初有这个：

<xs:element minOccurs="0" maxOccurs="unbounded" name="answer" type="xs:string" />

将其更改为此，您将获得正在寻找的验证：

<xs:element minOccurs="1" maxOccurs="unbounded" name="answer" type="xs:string" />

但是，如果您希望验证correct序列在answer列出的answer元素中没有列出answers多个{{1}}，则会{序列 - 你运气不好。您不能使用XML模式进行这种类型的验证。

使用XSD进行复杂的XML验证

1 个答案: