XSLT-标准化不间断的空白字符

问题描述

我有一个这样的示例 xml 文件，

I have a sample xml file like this,

<doc>
    <p>text1 text2  </p>
    <p>text1 text2     </p>
    <p>text1 text2   </p>
</doc>

这个示例xml，第一个

有空格空格字符( )，第二个

具有制表符空白字符 (	) 并且第三个 <p> 具有空格不间断空白字符 ( ).

this sample xml, first <p> has space whitespace character (&#x0020;), second <p> has tab whitespace whitespace character (&#x9;) and third <p> has space non-breaking whitespace character (&#x00A0;).

我需要删除在结束标记之前出现的任何空格.

I need to remove the any white spaces appearing just before closing tag.

所以，预期的输出应该是，

So, expected output should be,

<doc>
    <p>text1 text2</p>
    <p>text1 text2</p>
    <p>text1 text2</p>
</doc>

通过使用 xslt normalize-space() 我可以删除不必要的空格和制表符，但不能删除不间断的空白字符.

By using xslt normalize-space() I can remove unnecessary spaces and tab characters but not non-breaking whitespace characters.

<xsl:template match="p/text()">
    <xsl:value-of select="normalize-space()"/>
</xsl:template>

有什么建议可以规范化所有空格，包括 xslt 中的不间断空格?

Any suggestions how can I normalize all white spaces including non-breaking white spaces in xslt?

推荐答案

您可以:

<xsl:value-of select="normalize-space(translate(., '&#160;', ' '))"/>

这将适用于 XSLT 1.0 和 2.0.

This will work in XSLT 1.0 and 2.0 alike.

在 XSLT 2.0 中，您还可以使用正则表达式 - 例如:

In XSLT 2.0, you could also use regex - for example:

<xsl:value-of select="replace(., '[\t\p{Zs}]', '')"/>

将删除水平制表符以及Unicode Space_Separator 类别中的任何字符，其中不仅包括空格和不间断空格字符，还包括其他空格字符.文档很难找到，但我相信这是目前的完整列表:(摘自 http://www.unicode.org/Public/UNIDATA/UnicodeData.txt):

will remove the horizontal tab character as well as any character in the Unicode Space_Separator category, which includes not only the space and non-breaking space characters but also other space characters. Documentation is hard to find, but I believe this is currently the complete list: (extracted from http://www.unicode.org/Public/UNIDATA/UnicodeData.txt):

  SPACE
  NO-BREAK SPACE
  OGHAM SPACE MARK
  EN QUAD
  EM QUAD
  EN SPACE
  EM SPACE
  THREE-PER-EM SPACE
  FOUR-PER-EM SPACE
  SIX-PER-EM SPACE
  FIGURE SPACE
  PUNCTUATION SPACE
  THIN SPACE
  HAIR SPACE
  NARROW NO-BREAK SPACE
  MEDIUM MATHEMATICAL SPACE
　 IDEOGRAPHIC SPACE

𐲰 OLD HUNGARIAN CAPITAL LETTER EZS
𐳰 OLD HUNGARIAN SMALL LETTER EZS
𖼶 MIAO LETTER ZSHA
𖼼 MIAO LETTER ZSA
𖼾 MIAO LETTER ZZSA
𖽁 MIAO LETTER ZZSYA

但是，使用 Saxon 9.5 进行的测试表明无法识别最后 6 个字符:http://xsltransform.net/ncntCSo

However, testing with Saxon 9.5 shows that the last 6 characters are not recognized: http://xsltransform.net/ncntCSo

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