当使用CSS设置XML样式时，如何引用包含句点或冒号的标签名称？ [英] When styling XML with CSS, how to refer to tag names that contain periods or colons?

问题描述

我的样式中包含< a.b>< /a.b> 或< b ：c>< / b：c> 。现在当然，如果我写CSS规则像

  ab {
} 
 
b：c {
} 
  

它不会工作，因为这些字符将被解释为类和伪类。有没有办法用CSS引用这些标记名称？ （我不想使用 XSL ...）

$ b $如上所述，要在其标签名称中引用包含。的元素，您可以简单地转义it：

  a\.b 
  

$元素，但是<$ c $> 不能说 元素，因为：在XML中有一个特殊的含义，作为命名空间分隔符。这意味着你拥有的元素实际上是 b c www.w3.org/TR/xml-namesrel =nofollow>命名空间，而不是名为 b：c 的元素。 ¹

也就是说，有两种正确的方法来选择该元素。首先，因为我提到的元素实际上被称为 c 而不是 b：c ，你可以简单地使用： / p>

  c 
  

在名称空间冲突的情况下，第二种方法是首先在样式表的开头声明 b 命名空间，使用 @namespace code> xmlns：b 命名空间引用在文档中的某个位置，否则它将无效）：

  / *在XML文档中对应于xmlns：b的任何URL * / 
 @namespace b'http://ns.example.com/b'; 
  

然后使用命名空间前缀选择元素：

  b | c 
  

---

¹ 我们在这里谈论XML，而不是HTML或任何任何标记语言，其中：没有任何特殊意义。

I'm styling an XML document that contains tags like <a.b></a.b> or <b:c></b:c>. Now of course if I write CSS rules like

a.b {
} 

b:c {
}

It won't work because these characters will be interpreted as classes and pseudo-classes, respectively. Is there a way to refer to these tag names with CSS? (I don't want to use XSL...)

解决方案

As mentioned, to refer to an element with a . in its tag name you can simply escape it:

a\.b

But the same can't be said for a b:c element, because : has a special meaning in XML, as a namespace separator. This means that the element you have is actually a c element in the b namespace, not an element called b:c.¹

That said, there are two correct ways to select that element. First, since as I mentioned the element is actually called c and not b:c, you can simply use:

c

The second way, in case of namespace collisions, is to first declare the b namespace in the beginning of your stylesheet using @namespace corresponding to the one in your XML document (there should be an xmlns:b namespace reference somewhere in your document, otherwise it won't be valid):

/* Whichever URL corresponds to xmlns:b in your XML document */
@namespace b 'http://ns.example.com/b';

Then use a namespace prefix to select the element:

b|c

---

¹ _{Remember that we're talking about XML here, not HTML or any arbitrary markup language where : holds no special meaning.}

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