在RelaxNG中将元素定义为非空 [英] Define an element as non-empty in RelaxNG

问题描述

我已经开始使用RelaxNG来指定XML消息模式，并开始使用PHP DOMDocument来验证和解析传入的消息，但是无法弄清楚如何定义文本节点，因此该文本节点不能为空.模式示例:

I've started using RelaxNG to specify XML message schemas, and using PHP DOMDocument to validate and parse incoming messages, but can't figure out how to define a text node so that it cannot be empty. Example schema:

<?xml version="1.0"?>
<element name="amhAPI" xmlns="http://relaxng.org/ns/structure/1.0">
    <element name="auth">
        <element name="validateUser">
            <element name="username">
                <text/>
            </element>

            <element name="password">
                <text/>
            </element>
        </element>
    </element>
</element>

但是， DOMDocument :: relaxNGValidate正在验证以下消息是否正确方法(因为Relaxng 匹配任意字符串 [包括一个空字符串) text模式)，并且等效于):

However, the message below is being validated as correct by the DOMDocument::relaxNGValidate method (since relaxng matches any arbitrary string [including an empty one] with the text pattern) and is equivalent to ):

<?xml version="1.0"?>
<amhAPI>
    <auth>
        <validateUser>
            <username/>
            <password/>
        </validateUser>
    </auth>
</amhAPI>

因此，我必须对不应该为空的字段进行一堆检查和验证，如果验证者将其识别为非空元素，则可以将其删除.

Because of this, I have to add in a bunch of checks and validation for fields that are not supposed to be empty, which could be removed if the validator identified them as non-empty elements.

是否可以强制非空文本?

Is there a way to force non-empty text?

推荐答案

如果您的RELAX NG验证器支持XSD数据类型(大多数这样做)，则可以使用正则表达式来完善文本内容的约束:

If your RELAX NG validator supports XSD data types (most do), then you can use regular expressions to refine the constraints for text content:

<?xml version="1.0"?>
<element name="amhAPI" xmlns="http://relaxng.org/ns/structure/1.0"
  datatypeLibrary="http://www.w3.org/2001/XMLSchema-datatypes">
  <element name="auth">
    <element name="validateUser">
      <element name="username">
        <data type="string">
          <param name="pattern">.+</param>
        </data>
      </element>
      <element name="password">
        <data type="string">
          <param name="pattern">.+</param>
        </data>
      </element>
    </element>
  </element>
</element>

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